Yes, this statement is true. A gene that blocks DNA replication in response to DNA damage is fused to a regulatory element that activates transcription always, even when DNA is not damaged.
What do you mean by transcription?Transcription is the process of copying a segment of DNA into RNA. The segments of DNA transcribed into RNA molecules that can encode proteins are said to produce messenger RNA. Other segments of DNA are copied into RNA molecules called non-coding RNAs. mRNA comprises only 1–3% of total RNA samples.
Moreover, transcription is the first step in gene expression. It involves copying a gene's DNA sequence to make an RNA molecule. Transcription is performed by enzymes called RNA polymerases, which link nucleotides to form an RNA strand (using a DNA strand as a template).
Hence, transcription, as related to genomics, is the process of making an RNA copy of a gene's DNA sequence. This copy, called messenger RNA (mRNA), carries the gene's protein information encoded in DNA.
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What are 6 ways to prevent the spread of germs?.
Which layer of the intestinal wall contains most of the smooth muscle and controls the majority of intestinal movements?.
The majority of the smooth muscle in the intestinal wall is found in its smooth muscle layer, which also regulates most intestinal motions.
What are the two layers of gastrointestinal tract that regulate motility comprised of?The innermost tunic of the wall is called the mucosa, also referred to as the mucous membrane layer. The lumen of the GI tract is lined with it. The mucosa is composed of the epithelium, a layer of loose connective tissue beneath called the lamina propria, and a thin layer of smooth muscle called the muscularis mucosa. The mucosa creates folds that in some places increase the surface area. Certain mucosal cells release hormones, enzymes for digestion, and mucus. The ducts of other glands pass through the mucosa and into the lumen. In the mouth and anus, the epithelium is stratified squamous tissue, where thickness is necessary for abrasion protection. a simple columnar epithelial layer that is thin.
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which of the following represents a dna vaccine? a. attenuated measles virus b. a plasmid containing genes for influenza type a protein c. hepatitis b antigen produced in yeast cells d. tetanus toxoid
An example of DNA vaccine is a plasmid containing genes for influenza type a protein
what is DNA vaccine?
A DNA vaccine is a form of vaccine that works by infecting an organism's cells with a particular antigen-coding DNA sequence in order to elicit an immune response.
DNA vaccines function by infusing a genetically modified plasmid carrying the DNA sequence encoding the antigen(s) against which an immune response is desired, prompting the cells to manufacture the antigen directly and triggering a protective immunological response. From the following a plasmid containing genes for influenza type a protein represents DNA vaccine.
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Do genes contain instructions for assembling DNA?.
Genes do contain the instructions for assembling DNA, but they are not the only factor involved. The other factor is the proteins that make up the cell’s machinery.
The cell’s machinery is responsible for reading the genes and then using the information to assemble the DNA. The proteins that make up the cell’s machinery are called enzymes. Enzymes are like little machines that can read the genes and then put the DNA together.So, to answer the question, genes do contain the instructions for assembling DNA, but they are not the only factor involved. The other factor is the enzymes that make up the cell’s machinery.
Some scientists believe that genes do contain instructions for assembling DNA, while others believe that genes only provide the blueprint for assembling DNA and that the actual assembly is carried out by proteins. The answer to this question may be discovered through further research into the function of genes and their role in the cellular process of DNA replication.
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in negative control, a(n) protein binds to dna to gene transcription. group of answer choices repressor, prevent activator, prevent repressor, increase activator, increase
Proteins called transcription factors help turn particular genes "on" or "off" by attaching to surrounding DNA.
A gene's transcription is boosted by transcription factors that serve as activators. Reducers lessen transcribing.
An enhancer or silencer is a collection of transcription factor binding sites that can turn a gene on or off in a particular region of the body.
Cells can "decide" whether to express a gene by using transcription factors to execute logic operations and incorporate several sources of information.
Introduction: Do you possess any transcriptional regulators You'll struggle to maintain your cells functioning if the answer is no, therefore I really hope it is!
Proteins called transcription factors control the transcription of genes, which is the copying of genes into RNA before they are used to make proteins.
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the pyloric gland area of the stomach antrum secretes a. histamine b. gastrin c. intrinsic facto
The antrum of the pylorus contains the pyloric glands. They release gastrin, which their G cells generate.
What does the antrum secrete?Pyloric glands are located in the stomach's antrum, and their key characteristic is the presence of G cells that secrete gastrin. The pyloric and oxyntic glands include somatostatin-producing D cells, which regulate gastrin release and stomach acid output.
What exactly are the pylorus glands?Simple or branched tubular glands, the human pyloric glands spiral through the lamina propria's connective tissue. Pyloric gland (mucous) cells, parietal cells, and endocrine cells are the three types of cells that make them up.
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Suppose that for a certain gene, nearly 100 percent of the normal level of expression is required to produce the normal phenotype. Based on this requirement, one could predict that a _________ mutation would be _________.
Suppose that for a certain gene, nearly 100 percent of the normal level of expression is required to produce the normal phenotype. Based on this requirement, one could predict that a loss of function mutation would be recessive.
What is a gene?
The fundamental physical and functional unit of heredity is a gene. DNA constitutes genes. A chromosome is a lengthy DNA strand with numerous genes on it.
The relationship between two variants of a gene is described as dominant. Every gene has two different variations, or alleles, that an individual inherits from each parent. One allele will be expressed when there are different alleles of a gene; this allele is the dominant gene. Recessive, the other allele, has little or no effect.
Alleles with wild types often code for a substance required for a particular biological process. The function that it encodes for is also lost if a mutation arises in that allele. These mutations are known as loss-of-function mutations in general. The function can be lost to varying degrees. A null mutation is one in which the function has completely disappeared. It's also conceivable that some function might endure, but not to the same degree as the wild type allele. They are referred to as leaky mutations.
Mutations that cause loss of function are often recessive. When the wild-type allele and the loss-of-function allele are heterozygotes, the level of expression of the wild-type allele is frequently enough to produce the wild-type phenotype. This would categorize the loss-of-function mutation as recessive in terms of genetics. On the other hand, the wild type allele might not make up for the loss-of-function allele. In those situations, the heterozygote's phenotype will be identical to that of the loss-of-function mutant, and the mutant allele will take the role of the dominant allele.
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Individuals with pku tend to have high levels of _______ in their blood because they have an inactive variant of an _______.
People with PKU cannot break down the amino acid phenylalanine, which then accumulates in the blood and brain. This can lead to brain damage.
Phenylketonuria (commonly known as PKU) is an inherited disorder that increases the levels of a substance called phenylalanine in the blood. Phenylalanine is a building block of protein (an amino acid) that is obtained through the diet. It is found in all proteins and some artificial sweeteners.
Patients with phenylketonuria (PKU) have a diet-controlled deficiency in the conversion of phenylalanine (Phe) to tyrosine (Tyr), leading to decreased production of norepinephrine, adrenaline, and dopamine.
A genetic change (genetic mutation) causes PKU, which can be mild, moderate, or severe. In a person with PKU , a change in the phenylalanine hydroxylase (PAH) gene causes a lack or reduced amount of the enzyme needed to process phenylalanine, an amino acid.
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What are the 3 most important principles for storing food safely?.
The 3 most essential principles for storing meals adequately keep excessive-chance meals at five °C or below or above 60 °C to keep away from the temperature threat sector and food poisoning. shop raw ingredients underneath cooked meals. store meals in appropriate, covered boxes.
Principles offer us an understanding of the world around us, among us, and inside us, the know-how of the way matters appear and why they happen the manner they do. therefore, standards are possibly the most essential type of content material for us to include in the majority of our coaching. A precept is a type of rule, belief, or idea that courses you. you can additionally say a terrific, ethical person has a lot of concepts. In standard, a principle is some form of the fundamental fact that facilitates you with your life. "Be fair" is a principle that publications (or should guide) the general public and organizations.
A basic idea or rule that explains or controls how something happens or works: The u . s. a . is run on socialist ideas. The gadget works according to the precept of electromagnetic conduction.
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An adult feels the need to urinate when the _____________ contains 300 to 350 ml or urine.
Answer:
body
Explanation:
because it's obvious
The name of the botanist who devised a hierarchical system for classifying species was.
Carolus Linnaeus devised a hierarchical system for classifying species
Carl Linnaeus, also called Carl von Linné or Carolus Linnaeus, is frequently known as the father of Taxonomy. His system for naming, ranking, and classifying organisms is still in wide use nowadays (with many adjustments). His ideas on type have inspired generations of biologists for the duration of and after his very own lifetime, even the ones opposed to the philosophical and theological roots of his work.
He advanced a way to name and organize species that we nevertheless use nowadays. His maximum important contributions to taxonomy were:
A hierarchical classification system
The system of binomial nomenclature (a 2-part naming method)
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Complete the replicative cycle of a virus with a single-stranded genome that can function as mRNA.
(fig)
During a virus's single-stranded genome's replication cycle, infected cells release additional virus particles, which can then invade uninfected cells.
How can viruses with single-stranded RNA replicate?One of two distinct methods—RNA-dependent RNA synthesis or, in the case of retroviruses, RNA-dependent DNA synthesis (reverse transcription) followed by DNA replication and transcription—is used by RNA viruses to replicate their genomes.
RNA viruses produce mRNA in what ways?RNA polymerase encoded by the virus and packed inside the virion produces the mRNAs. Enzymes contained within the virion cap and methylate the RNA. After that, it is extruded from the capsid's vertices. The viral proteins produced by the translation of the mRNAs come together to form an immature capsid.
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TRUE/FALSE. in an exsexual species a beneficial allele and a deleterious allele are in linkage disequilibrium the selection pressure for the beneficial allele is lower than the pressure of purifying selection
Answer:
To that question the answer is True
Explanation:
Im pretty sure its True since i've had this simillar theme a litlle time ago.
Thank me Later
Tadano
a parent cell starts with 40 chromosomes. how many chromosomes will each daughter cell possess after meiosis ii?
At the end of meiosis II, each cell (i.e. gamete) would have half the original number of chromosomes, i.e. 15 chromosomes.
After meiosis II, when each parent cell divides into two gametes, each gamete cell contains 23 chromosomes. In this phase, each gamete remains haploid in nature. At the end of meiosis II, each cell will have half of the actual chromosome, that is, 23 chromosomes. At the end of this process, a single cell produces two new daughter cells, each with the same amount of genome as that present in the parent (initial) cell. Therefore, a cell with 40 chromosomes during the onset of mitosis will produce daughter cells with 40 chromosomes. Option C is mitosis for a diploid organism. 14. D: G1 phase is prior to replication. During prophase I, all chromosomes are made up of 2 sister chromatids and we have not yet divided the genetic material, so the correct answer is 40 chromosomes x 2 chromatids/chromosome = 80 chromatids.
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a woman who has blood type a positive has a daughter who is type o positive and a son who is type b negative. rh positive is a trait that shows simple dominance over rh negative and is designated by the alleles r and r, respectively. a third gene for the mn blood group has codominant alleles m and n. which of the following is a possible phenotype for the father?
A third gene for the MN blood group has codominant alleles M and N. This means that the father of the children must have at least one R allele, one M allele, and one N allele. Therefore, a possible phenotype for the father would be blood type A positive, Rh positive, MN positive.
In order to determine the father’s genotype, we must look at the genotypes of the mother and the two children. Since the mother is type A positive, she must have two A alleles and two R alleles (AO and Rr). The daughter is type O positive, which means she has two O alleles and two R alleles (OO and Rr). The son is type B negative, which means he has two B alleles and two r alleles (BB and rr).
From this information, we can deduce that the father must have at least one A allele, one B allele, and two R alleles. Therefore, the possible genotypes for the father can be AO and Rr, BO and Rr, AB and Rr, or AB and RR. All of these genotypes would result in a phenotype of blood type A positive, Rh positive, MN positive.
In conclusion, a woman who has blood type A positive and two children with different blood types (O positive and B negative) could have a father with a phenotype of blood type A positive, Rh positive, MN positive. The possible genotypes for the father in this situation would be AO and Rr, BO and Rr, AB and Rr, or AB and RR.
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Activity in brain networks, rather than structural differences, forms the basis of.
Anatomical connections connecting a group of brain components are referred to as structural connectivity. These connections often refer to white matter projections connecting cortical and subcortical regions at the level of the human brain.
What are brain networks?There isn't a set number of brain networks; however, at the highest level, the sensorimotor system, visual system, limbic system, central executive network (CEN), default mode network (DMN), and salience network can be considered to be the seven main networks of the brain. Other networks may exist, depending on how precisely they are defined.Fortunately, the UDL framework targets three different brain networks: emotive, recognition, and strategic, which can be used to organize learner .The term "structural connectivity" refers to the anatomical connections that connect a group of brain components. On a human brain size, these connections often refer to white matter projections connecting cortical and subcortical areasTo learn more about brain networks refer to:
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how can cells, such as kidney cells and connective tissue cells, become specialized to carry out certain functions?
The reason that cells perform different functions is because a certain cell type might activate or silence a particular gene which not be the case of the other cell. Hence, some cells are expressed in some cells while remain silent in the others. In this way, cells become specialized to perform their functions such as kidney cells and connective tissue cells, become specialized to carry out certain functions.
DNA makes up genes. Many genes do not, however, encode proteins. Genes in humans can range in size from a few hundred DNA bases to more than 2 million bases. There are two sorts of cells: prokaryotic cells, which lack a nucleus but still have a nucleoid area, and eukaryotic cells, which have a nucleus. Prokaryotes are single-celled creatures, whereas eukaryotes can be either single-celled or multicellular.
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What is the purpose of a food defense plan?.
A food defense plan's main goal is to protect the safety of the nation's food supply by directing federal regulators' attention away from responding to contamination and toward avoiding contamination just to better the public's health .
Food defense plan refers to the safeguarding of food items against deliberate adulteration or contamination with the aim of endangering the public's health and/or disrupting the economy.
The vulnerability assessment indicated threats that must be reduced by the food defense plan team. They will also oversee and implement the program's procedures and tools. Developing and implementing an efficient food defense plan are among the other responsibilities.
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which of the following are stages of binary fission? select all that apply. the cell duplicates its chromosome and starts to extend its cell membrane and cell wall. when the cell has almost doubled in size, new membrane and cell wall are deposited across the midsection. the partitioning of the cell results in two identical descendant cells. the chromosome attaches to the inside of the plasma membrane.
The cell divides into two identical offspring after partitioning, duplicating its chromosomes and beginning to stretch its cell membrane and cell wall.
Binary fission is a method of prokaryote reproduction used by bacteria. Cell division is the only way for unicellular organisms to create new individuals. The result of cell reproduction in both prokaryotic and eukaryotic cells is a pair of daughter cells that are genetically identical to the parent cell. Daughter cells are distinct entities in unicellular organisms. Several processes are necessary to produce identical daughter cells. To equip the two new cells with the equipment to support life, the cytoplasmic contents must be divided and the genomic DNA must be replicated before being distributed to the daughter cells. Because bacterial cells have a single circular DNA chromosomes for their whole genome, cell division is made easier. Since there is no nucleus or numerous mitochondria,
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Part Which of the following statements about the interactions between the circulatory and respiratory systems is/are true? Select all that apply. During exercise, the heart pumps faster and the demand for oxygen decreases. Blood flows from the right side of the heart to the body, then to the left side of the heart and then to to lungs. The ability of oxygen to be carried in the blood is largely mediated by the presence of the protein hemoglobin. The interactions between alveoli and capillaries allow for gas exchange to occur.
Each applies To supply the body with oxygen, the respiratory system collaborates directly with the circulatory system.
How do alveoli and capillaries interact?The alveoli are encircled by capillaries, which are tiny blood vessels. The capillaries and alveoli's thin walls allow oxygen to get from the alveoli to the blood. The capillaries later join the veins, which are bigger blood vessels, to carry the oxygenated blood from the lungs to the heart.
Do capillaries have a gas exchange system?Each alveolus is closely connected to a network of capillaries that transports deoxygenated blood from the pulmonary artery. Due to the thin alveolar and capillary walls, gases can interchange swiftly via passive diffusion along concentration gradients.
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Staphylococcus aureus produces ________, an enzyme that results in the accumulation of fibrin around the bacterial cells, and the test for it helps to diagnose it.
The Staphylococcus aureus enzyme that causes fibrin to build up around the bacterial cells and aids in the diagnosis of the infection is coagulase.
What is the significance of the enzyme coagulase?S. aureus produces a number of enzymes, including coagulase (bound and free coagulases), which makes it easier for fibrinogen to turn into fibrin, which is crucial for the formation of clots in skin infections. It is a protein enzyme that allows fibrinogen to be changed into fibrin by a variety of bacteria.
Coagulase test- Additionally, it is used to differentiate between several Staphylococcus isolate kinds in the lab. If the coagulase test is positive, it indicates that S. aureus or any of the other coagulase-positive Staphylococci are present. Instead, a negative coagulase test may indicate the presence of organisms that lack the enzyme.
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outline the steps involved in the feeding pathway for the entry of galactose into glycolysis (2 pts). g
The Leloir pathway named for Luis Federico Leloir, who discovered the overall mechanism of galactose utilization is the set of stages by which this happens.
What is the galactose pathway?The Leloir pathway is used to digest galactose, allowing it to go through either gluconeogenesis or glycolysis. The conversion of -d-galactose to -d-galactose by mutarotase is the first step in this route.
What is the glycolysis feeder pathway?As we'll be defining it here, a feeder pathway for glycolysis is essentially something that feeds glucose or another starting material into the pathway. As we shall see, the beginning material may be a monosaccharide, a disaccharide, or a polysaccharide (such as glycogen or starch).
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A stomach cell is producing pepsin, an enzyme that hydrolyzes proteins. Which of the following events suggests that gene expression of pepsin has been turned off in the cell? The chromosome with the pepsin gene is tightly coiled.
The chromosome with the pepsin gene is tightly coiled.
What is hydrolyzes proteins?The process by which genetic information travels from genes to proteins is referred to as "gene expression." Transcribed genes, an operator, and a promoter make up a gene operon.
Proteins known as transcription factors are activated by signals from the environment or from other cells. These proteins affect the level of transcription by attaching to regulatory areas of a gene.
Genetic transcription and translation are the two steps in the process of gene expression, which involves converting the data contained in a gene first into messenger RNA and subsequently to a protein.
Genome: the complete set of genetic information contained in an individual. gene expression: the activation or "turning on" of a gene that causes transcription and the production of mRNA.
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a type of intercellular junction is formed by a desmosome which involves an attachment of a cell to an adjacent noncellular surface true false
Answer:
True
Explanation:
Desmosomes are intercellular junctions that provide strong adhesion between cells
if neonicotinoids bind to the acetylcholine receptors stoping the channels from opening what happens to the nerve impulse?
If neonicotinoids bind to the acetylcholine receptors stoping the channels from opening it will induce neuronal depolarisation and temporarily prevent the action of acetylcholine.
Neuronal depolarization relies upon on the hole of ion channels withinside the neuronal membrane and the following inflow of sodium ions (Na+) and efflux of potassium ions (K+). Neuronal responses to ion channel receptor activation by natural ligands/neurotransmitters or drugs are rapid and brief.
During depolarization, the cell's internal negative charge temporarily becomes more positive (less negative). This shift from negative to more positive membrane potential occurs during several processes, including action potentials.
Neonicotinoids bind to acetylcholine receptors on the post-synaptic membrane of insect cholinergic synapses. Because cholinesterase does not break down the pesticide, it remains bound to its receptors, preventing the binding of acetylcholine.This blocks synaptic transmission that kills insects.
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Egrets are birds that walk into the shallow waters of marshes and wetlands to catch fish and insects with their long beaks. which short-term environmental change is most likely to directly affect a population of egrets along the coast of florida? drought earthquake forest fire
Answer: drought
Explanation:
because it needs to get the fish from the water so it wouldn't be able to if the fish were no longer there.
hope this helps :)
Answer:
A. Drought
Explanation:
individuals migrating between populations can cause genotype frequencies in a population to change. group of answer choices true false
True migration will alter gene frequencies by introducing additional copies of an allele that is already present in the population.
Can the genotype frequencies of a population change?In a population, genotype frequencies can change while allele frequencies can stay the same. Non-random mating will alter genotype frequencies but not allele frequencies in the population.
How does emigration impact the frequency of genes?Genetically distinct creatures migrate when they leave one population for another. It is a different type of gene flow, but typically has a negative impact on genetic diversity. This is due to the exodus of rare alleles from the gene pool.
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most exotoxins fall into three general categories that reflect their structure and general mechanism of action. what are these three categories?
The three categories include :
Super-antigensMembrane-damaging toxins,A-B toxinsWhat do you mean by Exotoxins ?
An exotoxin is a toxin secreted by bacteria.It can cause damage to the host by destroying cells or disrupting normal cellular metabolism. They are highly potent.They cause major damage to the host. The body's major defense against exotoxins is the production of antitoxin antibodies.They are used as carriers for the delivery of heterologous molecules.They elicit an immune response and as agents in the development of cell-specific chemotherapy.To know more about Exotoxins from the given link
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the immune system provides protection against many types of threats. identify the types of cells, organisms, and infectious agents that are recognized by the immune system. check all that apply. cancer cells, bacterie, viruses, a person's own skin cells, prions, transplanted cells from a donor
the immune system provides protection against cancer cells, bacteria, viruses, a person's own skin cells, prions, transplanted cells from a donor.
How does immune system provide protection?The immune system defends the body against disease and infection, including cancer, and shields it from potentially harmful elements like germs and viruses. Immune system cells constantly circulate throughout the body, scanning for potential invaders such as bacteria. Antigens, which are proteins on the surface of the invading cells, are used by the immune system to identify invaders. Every substance or cell has a unique set of antigens, and every person's cells include "self-antigens" that are particular to that person. Self-antigens are found on normal human cells such thyroid, liver, and colon cells. Self-antigen-containing cells normally pose little danger. However, since invader germs do not come from the body, they do not carry self-antigens but rather what are referred to as "nonself-antigens. The immune system is built to recognize cells that contain non-self antigens as dangerous and react accordingly. To communicate with other immune cells and manage the body's response to threats, the majority of immune cells release cytokines (messengers).
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Select the correct answer.
Which of the following vessels derive from the aortic arch?
O A. Right common carotid artery
О B. Right subclavian artery
O C. Brachiocephalic trunk
O D. All of the above
Vessels derive from the aortic arch is Brachiocephalic trunk.
What is Brachiocephalic trunk?One of the three major vessels of the aortic arch that carries blood to the head, neck, and upper extremities is the brachiocephalic artery, also known as the brachiocephalic trunk or, more popularly, the innominate artery.The brachiocephalic trunk, sometimes referred to as the brachiocephalic or innominate artery, is the second branch to emerge from the aorta. The right sternoclavicular joint is where it splits into its final branches after traveling upward from the aortic arch through the superior mediastinum.The right subclavian and right common carotid arteries emerge from the brachiocephalic artery after a brief superior journey.
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