Which of the following can lead to decreased venous
return of blood to the heart?
a) an increase in blood volume
b) An increase venous pressure
c) damage to the venous valves
d) increased muscular activity
Answer: c

Answers

Answer 1

Answer:

I think no.d is the answer.

Explanation:

one question ,

why is there answer: c in the question??


Related Questions

How many molecules of glucose does cellular respiration make?.

Answers

Under aerobic circumstances, the process splits a glucose molecule into two pyruvates (pyruvic acid) molecules, making 2 ATP as energy.

What is cellular respiration?

Producing two net molecules of ATP as energy, in reality, each glucose molecule produces four ATP molecules, although, during the initial stages, two ATP molecules are used.

As much as 38 ATP molecules can be created from one glucose molecule throughout the three phases of cellular respiration combined.

Therefore, one molecule of glucose is used in cellular respiration to make 2 ATP as energy.

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Which of the following series is organized according to the levels of organization used by ecologists?
a) population -> ecosystem -> community
b) species -> community -> abiotic factors
c) species -> ecosystem -> population
d) population -> community -> biotic factors
e) population -> community -> ecosystem

Answers

The levels of organization used by ecologists is  population -> community -> ecosystem.

Which level of ecology is concerned with an environment's biotic and abiotic components?

An ecosystem is made up of both living and non-living elements of the environment (all populations of living things). A region's biotic and abiotic elements come together to form an ecosystem.

What is the research on how biotic and abiotic elements interact in the environment?

Ecology is the study of how biotic and abiotic forces interact. Any organism's niche is determined by how it responds and behaves in response to the distribution and abundance of abiotic stimuli.

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What is agile beginner?.

Answers

Agile gives healthcare teams the ability to swiftly identify and solve issues with patient care, acquiring medical supplies, staffing, and a variety of other duties involved in providing healthcare.

Because it helps the product team to more precisely identify the components and Agile features that matter most to end users (whether they be patients or medical staff), an adapted Agile development approach works effectively for the majority of healthcare solution projects.

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Why is it accurate to claim that the legume-bacteria mutualism described in the text is contingent?.

Answers

Legumes are able to form a symbiotic relationship with nitrogen-fixing soil bacteria called rhizobia. The result of this symbiosis is to form nodules on the plant root, within which the bacteria can convert atmospheric nitrogen into ammonia that can be used by the plant. Establishment of a successful symbiosis requires the two symbiotic partners to be compatible with each other throughout the process of symbiotic development.

What processes during the cell cycle ensures appropriate cell growth and rates of division? malfunction of these processes can lead to uncontrolled growth and cancer.

Answers

Centrioles ensures appropriate cell growth and rates of division.

What are Centrioles?

Small clusters of microtubules known as centrioles are positioned precisely within the cell nucleus. Because these organelles are only visible while they are assisting the cell during the phases of cell division, they are not clearly apparent within the cell (mitosis and meiosis).

Centrioles are composed of nine clusters of microtubules. When the cell is dividing, they are typically found in pairs and move towards the opposite pole ends of the nucleus. Centrioles duplicate during the Interphase of cell division.

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when the cumulative effects of an infection damage or disrupt tissues and organs, the pathologic state that results is called

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The pathologic state that emerges is referred to as disease when the cumulative consequences of an infection disrupt or destroy tissues and organs.

What is a disease?

Disease, which differs from physical injury in origin, is any unfavorable change from an organism's normal structural or functional condition that is often followed by a set of symptoms. A diseased organism frequently displays symptoms or indicators that point to its aberrant condition. Thus, it is necessary to comprehend an organism's normal state in order to identify the symptoms of sickness. However, there is not always a clear distinction between illness and wellness.

The term pathology is referred as the study of disease. It requires identifying the underlying cause of the disease (etiology), comprehending the pathophysiology of it, the structural alterations brought on by the disease process (morphological alterations), and the functional effects of those alterations.

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as a result of rotation about six of its bonds, dna can exist in a variety of forms. determine whether each of the following images and properties describes the a form, b form, or z form of dna.

Answers

As a result of rotation about 6 of its bonds, DNA exists in a A form.

All prokaryotic and eukaryotic cells as well as various viruses contain deoxyribonucleic acid, also known as DNA. DNA is an organic molecule with a complex molecular structure. DNA encodes genetic information that is used to transmit inherited traits.

With the aid of the work of biophysicists Rosalind Franklin and Maurice Wilkins, James Watson and Francis Crick discovered that the structure of DNA is a double-helix polymer, a spiral made up of two DNA strands twisted around one another. Scientists' understanding of DNA replication and the genetic control of biological processes has significantly increased as a result of the discovery. polynucleotide chain of deoxyribonucleic acid (DNA) .DNA is made up of long chains of monomer nucleotides that are called deoxyribonucleic acid polynucleotide chains (DNA).

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What type of body composition method uses air displacement to determine body volume and correlates well with underwater weighing to determine body fat mass?.

Answers

The type of body composition method that uses air displacement to determine body volume and correlates well with underwater weighing to determine body fat mass is called Plethysmography.

What is Plethysmography?

Plethysmography is a process that measures changes in the volume of different body parts to determine if there are blood clots in the arms or legs and the lung capacity to hold large amounts of air.

This process is conducted using a machine known as the Bod Pod which is a computerized device in the shape of an egg. It measures the weight and volume to determine body density and calculate body fat mass.

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the ecosystem-based fishery management approach differs from the maximum sustainable yield approach because it . (mark all that apply.)

Answers

The ecosystem-based fishery management approach differs because it

-acknowledges uncertainties in the system

-acknowledges diverse societal uses of fish stocks, including fishing, recreation, and tourism.

The ecosystem-based fishery management is a strategy that emphasizes a comprehensive approach to fishery management in a way that benefits humans in many ways, such as fishing for food or recreation or for breeding new fish stocks.

This strategy is crucial for monitoring the effects of human involvement in the fisheries environment and for figuring out how to establish a stable balance between the two without endangering the latter.

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7) a student encounters a pondweed which, judging from its appearance, seems to be a charophyte. she brings a sample back to her biology lab. using only a compound light microscope to study the sample, which of the following features should help her to determine whether the sample comes from a charophyte or from some other type of green alga? 1. molecular structure of enzymes inside peroxisomes 2. structure of sperm cells 3. presence of phragmoplasts 4. rings of cellulose-synthesizing complexes a) 1 and 3 b) 1 and 4 c) 2 and 3 d) 1, 3, and 4 e) 2, 3, and 4 topic: concept 29.1

Answers

Because they have such high quantities of oxidative enzymes like catalase and urate oxidase, some cells' peroxisomes can be distinguished in electron micrographs by the presence of a crystalloid core.

What's the peroxisome's molecular make-up?

The phospholipid bilayer that makes up the peroxisome structure contains several membrane-bound proteins. The lipid metabolism-related enzymes are produced on free ribosomes and then specifically transported into peroxisomes.

What properties do peroxisomes have?

Peroxisomes are extremely heterogeneous organelles that differ depending on the species, tissue, cell, metabolic state, or developmental stage in terms of their size, shape, and protein content. Peroxisomes are typically solitary membrane-bounded organelles with an electron-dense matrix made up of finely ground granules.

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an investigation into the link between the frequency of flossing and periodontal disease is called:

Answers

A correlational study is one that looks at the frequency of flossing and periodontal disease.

What is a correlational study?

A correlational study is a type of research design in which the relationships between two or more variables are investigated. Correlational studies are non-experimental, which means that no variables are manipulated or controlled by the experimenter. A correlation is a relationship that exists between two variables. Correlations can be positive or negative, strong or weak. There are times when there is no correlation. A correlation study can produce three results: a positive correlation, a negative correlation, or no correlation. The correlation coefficient is a numerical value that researchers can use to present their findings.

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crossing over during prophase i results in . group of answer choices duplication nondisjunction reciprocal translocation genetic recombination

Answers

Crossing over during prophase I result in genetic recombination.

Genetic recombination is the mixing of some of the genetic material (DNA) from two different cells to form recombinant DNA.

Crossing over results in an exchange of genetic material between chromosomes that occurs only in prophase I of meiosis. During prophase I, homologous chromosomes (one from the mother and one from the father) pair up.

Prophase I in meiosis I division occurs several events:

The splitting of centrosomes into centrioles.Chromatin condenses into chromosomes.Centrioles move towards the opposite polar.Homologous chromosomes close together to form synapses.Molecules form tetrads.Crossing over occurs.Spindle threads are formed from the movement of the centrioles.The nuclear membrane is not visible.

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A chemical company produced a genetically engineered potato called the New Leaf Superior. This plant produces a chemical
that repels insects that might eat the plant. The offspring of the plant will also produce the chemical. What is the most likely,
possible, disadvantage of growing this type of potato?

a
Resistance developed to the chemical by harmful insects.
b
Significantly decreased harvest production of the potatoes.
c
Increased bioluminescence/attraction to fireflies.
d
Decreased nutrient composition in crops.

Answers

Answer: a

Explanation:

a particular trait is determined by a single gene. if there are 3 possible alleles, then how many different genotypes are there?

Answers

Six distinct genotypes are conceivable because there are three different alleles.

Even though there are three alleles in a population, each person only receives two of them from their parents. The genotypes and phenotypes shown below are the outcome of this. Consider that there are six different genotypes when three alleles are present.

There are, however, some situations in the population when there are more than two choices (alleles) present. These situations, where several variants of the same gene occur in the population, are known as "multiple alleles."

Multiple alleles are these three or more variations for the same gene.

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innate or biologically determined gender-specific roles innate or biologically determined gender-specific acts innate or biologically determined gender-specific behaviors

Answers

The main explanation for gender roles in the past has been believed to be the biological differences between men and women. Although evidence suggests that biology contributes to gendered behavior .

The innate or biologically based gender-specific behaviors are known as gender traits. We benefit from cross-cultural research because it shows that most gender-specific behaviors vary greatly across cultures and are largely influenced by them.

Hormone levels during pregnancy and lactation as well as genetic make-up are biological aspects that might affect gender identification. Social influences include gender stereotypes that are ingrained in a child's mind by their family, peers, the media, and other prominent adults.

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a translation of most proteins. b increased synthesis of chaperones. c decreased proteasome activity. d all of the above.

Answers

The unfolded protein response involves increased synthesis of chaperones. So option (b) is the correct answer.

Chaperones are a group of functionally related proteins that support intracellular protein folding under physiological and stress conditions. They share the ability to recognize and bind non-natural proteins, preventing non-specific aggregation.

Chaperones are a family of proteins that play an important role in stabilizing unfolded proteins. This stabilization aids in many processes such as translocation, disassembly and folding.

When a male examiner performs an intimate examination or procedure on a female patient, a chaperone is most often needed or required, but the appointment of a chaperone indicates whether they are participating in the procedure or playing a supportive role. Whether or not they play depends on the role expected of them. that's all.

Complete question:

The unfolded protein response involves

a. translation of most proteins.

b. increased synthesis of chaperones.

c. decreased proteasome activity.

d. all of the above.

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What is the importance of cilia?.

Answers

Cilia moves microbes and debris up and out of the airways.

Which one of the following choices increases blood alkalinity and influences blood pressure?.

Answers

Iron increases blood alkalinity and affects blood pressure

Iron is the essential trace of element in the blood. It helps your body make healthy red blood cells, which carry oxygen throughout the bloodstream. Too little or that too much iron also can cause health problems. Too little iron in the body can cause a condition called anemia. The normal range of values ​​are:iron:60 to 170 micrograms per deciliter (mcg/dL) or 10.74 to 30.43 micromoles per liter (micromoles/L) Total Iron Binding Capacity (TIBC):240 to 450 mcg/dL or 42.96 to 80.55 micromoles/L. Your body regularly gets iron from the foods you eat. Not getting enough iron can cause your body to become iron deficient over time. Examples of iron-rich foods include meat, eggs, green leafy vegetables, and iron-fortified foods.

Question seems incomplete the complete question is

Which of one the following choices cause increases blood alkalinity and the influences blood pressure

1.iron

2.nylon

3.zinc

4.cobalt

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most species that can reproduce using parthenogenesis can also prodcue sexually. what might be an advantage to being able to reproduce both ways?

Answers

Advantage to being capable of reproduce each approaches is that, In maximum organisms, parthenogenesis produces handiest lady offspring, which has a specific gain over different varieties of replica.

Both strategies have advantages. Sexual replica is ideal for growing a various gene pool which could resist a dynamic and converting environment. Asexual replica is useful for organisms that are not capable of flow round and for growing a large, uniform populace. Some overachievers in nature do each. Female offspring are capable of make a contribution without delay to the populace of a species, being capable of undergo and bring the following generation.

The reality that maximum eukaryotes reproduce sexually is proof of its evolutionary success. In many animals, it's far absolutely the handiest mode of replica. The genetic variety of sexually-produced offspring is notion to provide species a higher risk of surviving in an unpredictable or converting environment.

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Which factors may contribute to the extinction of a species? check all that apply.

Answers

The factors that may contribute to the extinction of a species are more individuals fighting over the same resources, the loss of the environment in which an organism's needs are met, and the lack of predators in an area.

Extinction of species refers to the extinction of one type of organism species or of a number of different types of organism species. The end of a certain species is considered to have occurred when the last member of that species passes away.

When that variety of the species of the organism exploits an ecological niche, new varieties of the organism typically develop and thrive through evolution. However, they typically go extinct when they are no longer able to survive as a result of changes in environmental conditions or when they come up against the superior competition.

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the amount of energy found in the snail in terrarium 1 was determined to be 358 kilocalories. explain why the number of kilocalories in the plant matter would be estimated to be 3,500 kilocalories.

Answers

As we know the flow energy from trophic levels is only 10% of the net energy transferred from one trophic level to another. So, if a snail has 358 calories, then the plant stores energy of 3580 kilocalories or about 3500 calories.

Plants are the main producers in trophic levels. This means that plants produce and synthesize their food. Snails at the trophic level are the main consumers. Hence, slugs are at the second trophic level.

We know that only 10% of the net energy is transferred from one tropic level to another. So, if the amount of energy possessed by a snail is 358 kilocalories.

So, 10% of (plant energy) = 358 kilocalories

Plant energy = 358 kilocalories*100/10 = 3580 kilocalories or about 3500 kilocalories.

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manatees are large, gentle, slow-moving sea creatures found along the coast of florida. many manatees are injured or killed by boats. here is a scatterplot showing the relationship between the number of boats registered in florida (in thousands) and the number of manatees killed by boats for the years 1977 to 2015.

Answers

Using correlation coefficients, as the scatter-plot is increasing linearly, it is found that the value of r is greater than 0 and close to 1.

What is Correlation Coefficient?

This is a metric that measures the correlation between two variables and takes values ​​between -1 and 1.

If positive, it means the relationship is positive and directly proportional.If negative, it is inversely proportional. The relationship is strong if the absolute value of the correlation coefficient is greater than 0.6.

Researching the problem on the web shows that the relationship is modeled by increasing scatterplots. Therefore r > 0. Few points oscillate, indicating a strong relationship, so r is close to 1.

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The complete question is as follows:

Manatees are large, gentle, slow-moving sea creatures found along the coast of florida. many manatees are injured or killed by boats. here is a scatterplot showing the relationship between the number of boats registered in florida (in thousands) and the number of manatees killed by boats for the years 1977 to 2015. is r>0 or r<0? closer to r=0 or r=+- 1? explain your reasoning

TRUE/FALSE the juxtaglomerular apparatus changes if osmolarity to increase the amount of water in the distal tubule

Answers

the juxtaglomerular apparatus changes if osmolarity to increase the amount of water in the distal tubule. the statement is true.

What is juxtaglomerular apparatus?

The distal convoluted tubule and the glomerular afferent arteriole combine to generate the specialised juxtaglomerular apparatus. Its primary job is to control glomerulus filtration rate and blood pressure, and it is situated close to the vascular pole of the glomerulus.

What is osmolarity ?

In contrast to osmolality, which is the number of solute particles in 1 kg of solvent, osmolarity refers to the quantity of solute particles per 1 L of solvent. The distinction between osmolality and osmolarity is negligible for diluted solutions.

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In general, the skeleton of modern homo sapiens is more ____than archaic homo sapiens.

Answers

In general, the skeleton of modern homo sapiens is more gracile than archaic homo sapiens.

Who are archaic homo sapiens?

Both during the Pleistocene era and the time of the earliest humans, archaic homo sapiens lived. Compared to modern homo sapiens, they had a different body type and shape. Compared to the homo sapiens of the past, modern homo sapiens have softer bones. Compared to modern homo sapiens, the skeleton of the archaic homo sapiens is more durable. Because they were designed to survive in more extreme conditions, their structures are harder and wider. Archaic Homo sapiens had larger skulls than modern Homo sapiens; in addition, their shoulders, limb structures, and legs were all built differently from those of modern Homo sapiens.

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the immune system is a complex organization of specialized cells and structures with defenses to help protect the body against foreign substances. these foreign substances are also known as:

Answers

These foreign substances are also known as Antigens.

An antigen in immunology is a molecule, molecular structure, foreign particle, pollen grain, or other foreign substance that can attach to a particular antibody or T-cell receptor.

An immunological reaction may be brought on by the presence of antigens in the body. Initially, an agent that produces antibodies was referred to as an antigen. Proteins, peptides, polysaccharides, lipids, and nucleic acids can all serve as antigens.

Antigen receptors, such as antibodies and T-cell receptors, are responsible for recognizing antigens. Immune system cells produce a variety of antigen receptors, giving each cell a specificity for a single antigen.

Only lymphocytes that are able to detect an antigen are activated and enlarged after being exposed to it, a process known as clonal selection.

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an experimental animal has the bhlh family members snail1 and snail2 knocked out. what effect would this have on neural development?

Answers

G protein would constantly be in motion. G proteins are a family of proteins that serve as molecular switches within cells, they are engaged in the transfer of signals from the outside of the cell to its interior.

G proteins are trimers made up of three distinct subunits that activate adenylyl cyclase. Alpha, beta, and gamma subunits are the names of these. Gs is the name of the nucleotide-binding site on the alpha subunit. Adenylyl cyclase is activated when GTP binds to Gs, activating it in turn. When GDP binds to the nucleotide-binding site of G-protein, it becomes inactive.

When a signalling molecule like adrenaline binds, it makes it easier for GTP to replace the bound GDP and change the Gs into its active form. The beta and gamma Gs subunits separate from the alpha subunit as Gs is activated. Adenylyl cyclase is then activated by the Gs after it has bound GTP and its alpha subunit.

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What is found in all living cells?.

Answers

The same four major classes of organic molecules—nucleic acids, proteins, carbohydrates, and lipids—make up every cell in the body.

The smallest unit in biology that is capable of independent living and that comprises all living things as well as the body's tissues. The cell membrane, nucleus, and cytoplasm make up a cell's three main structural components. The cell membrane, which encloses the cell, regulates the substances that enter and exit the cell. All living things contain organic molecules, which include a variety of vital biological elements like enzymes, hormones, and antibodies. Ribonucleic acid and deoxyribonucleic acid (DNA) are the two main types of nucleic acids. DNA is the genetic building block of all living things, including bacteria with just one cell and mammals with many cells. DNA is present in every cell of a living thing. In a multicellular organism, the full set is actually present in almost every cell.

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an unusual cirvulation mechanism when veins, instead of arteries, supply blood to the capillary bed is found inlyt in a few places in the body and is called circulation

Answers

Portal circulation is a unique form of circulation that occurs at a few locations across the body when veins instead of arteries provide blood to the capillary bed.

Micro circulation is the movement of blood over a capillary bed from an arteriole to a venule. To allow for the exchange of nutrients and other biological components between the blood through circulation and the surrounding tissue, blood flow in the capillaries slows down. Only a single red blood cell may get through without deforming.

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photosynthesis is a process that occurs in the cells of , algae, and some bacteria. there are 2 stages. during stage 1, the , energy from the sun is absorbed by in the of the chloroplast. then, during the (stage 2), is converted into glucose in the of the chloroplast.

Answers

Photosynthesis occurs in two stages : the light-dependent stage to produce ATP, and the light-independent stages to produce glucose.

How are the light-dependent and light independent phase linked?

Photosynthesis is the process to convert light energy into chemical energy.  This process is carried out by plants, algae and some bacteria which has pigment.

In the plant cell, there are organelles called chloroplast which has structures, thylakoid and stroma.

In simply, the process of photosynthesis use sunlight, water, carbon dioxide to create oxygen and sugar. However, there are many steps of photosynthesis that can be broken down into :

Light-dependent reactions. It takes place in the thylakoids and require sunlight. Through this process ATP, oxygen and reduced NADP are produced.Light-independent reactions (Calvin cycle). It happens in stroma and doesn’t need the light. The product of the last stage (ATP and reduced NADP) are used for completing the process. This stage produces complex organic molecules, including carbohydrates.

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Help me! Pretty please with a cherry on top?!
How do membrane bound organelles like mitochondria interact with the cytoskeleton?

Answers

Answer:  They form dynamic contacts with each other to exchange molecules and regulate organelle division and positioning in coordination with the cytoskeleton

Explanation: I hope this helps!!!!

Organelles that are membrane-bound create dynamic interactions with one another to exchange molecules and control organelle placement and division in concert with the cytoskeleton.

What is a cytoskeleton?

It is generally known that mitochondrial-cytoskeletal interactions play a part in mitochondrial mobility. Recent research suggests that these interactions control the equilibrium of mitochondrial fission/fusion, mitochondrial turnover, and mitochondrial inheritance during cell division.

The cytoskeleton's protein filaments act as "tracks," allowing organelles to move about the cell.

In multicellular organisms, the cytoskeleton can move the entire cell by moving itself in addition to aiding intracellular organelle movement.

Therefore, by creating dynamic interactions with one another mitochondria interact with the cytoskeleton.

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