A muscle contracts in response to an electrical signal that signals the ______________, the unit of contraction, to shorten.

Answers

Answer 1

Answer:

Sarcomere

Explanation:

A sarcomere is the basic contractile unit of muscle fiber. Each sarcomere is composed of two main protein filaments—actin and myosin—which are the active structures responsible for muscular contraction.


Related Questions

The skin is the body's largest organ. It's made up of many different types of cells.

a. True
b. False

Answers

A. TRUE
The skin is the largest organ of the body. ... It protects the body from external factors such as bacteria, chemicals, and temperature. The skin contains secretions that can kill bacteria and the pigment melanin provides a chemical pigment defense against ultraviolet light that can damage skin cells.

1.3.1 Project - Semester 1 Honors Biology Project, Part 1 (Project) PLEASE DONT KNOW WHAT IT TOPICS IT MEANS TO CHOOSE FOR THIS PROJECT

Answers

Answer:

This is very vague. I am pretty sure that there are other instructions.

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Using the alleles A and a, what is the genotype of individual
a) 11-6
b) 1-4
11-7

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Answer:

what is that supposed to be? maybe a pic of the question?

what is found in the body cells but not sex cells

Answers

Answer:

Sex Cells have 1 set of chromosomes while Body Cells have 2 sets of chromosomes  

Meiosis reduces chromosome number so that sex cells (eggs and sperm) have a half set of chromosomes–one homolog of each pair. This is the haploid number.

Explanation:

who has a better sense of smell, dogs or lions ( i dont know if the subject is right )

Answers

Answer:

dog

Explanation:

Answer:

cats smell better than dogs by a landslide and since a lion is a cat, you can say lions smell better.

Explanation:

what are the four final cell types produced by oogenesis in the female

Answers

Answer:

Oogenesis in the female is the process that produces fertile eggs, ready for fertilisation by the male sperm. Each egg has only one of each of the 23 human chromosomes - normal body cells have a pair of each, having 46 chromosomes in total.

To produce egg cells, the process of oogenesis takes place in the female ovary. Progenitor cells divide through a cell division process called meoisis, which is also known as a reduction division.

Instead of one cell splitting into two identical cells, four cells are produced which have half the normal number of chromosomes - they are described as being haploid.

The four cells are all genetically different because the process of meiosis involves cross overs of the chromosomes during division, so mixing up the genes inherited from the woman's mother and the woman's father. This variation produces fitter offspring as it widens the genetic variation that is possible.Explanation:

Having dimples (D) is dominant over not having dimples (d). A dimpled woman (whose father had no dimples and whose mother did have dimples) marries a man whose mother had no dimples, whose father had no dimples, and whose grandparents on his father’s side did have dimples!

What is the father's genotype?

A)DD
B)Dd
C)dd

Answers

Answer:

C

Explanation:

if he had the traits DD or Dd he would have dimples

Two students were having a discussion about viruses. Student A believes viruses are not living organisms. Student B believes viruses are living organisms. Which student is correct and why?.

Answers

Answer:

Dois alunos estavam discutindo sobre vírus. O aluno A acredita que os vírus não são organismos vivos. O aluno B acredita que os vírus são organismos vivos. Qual aluno está correto e por quê?

Explanation:

espero ter ajudado boa noite

A submicroscopic virulent agent that infects animals, plants, bacteria etc. is called viruses. They are capable of copying inside host cells only. Viruses cause many diseases in animals and plants.

The correct discussion is:

Student A believes that viruses are not living organisms.

The student's statement can be explained as:

The virus is not capable of reproducing on its own without a host system. Therefore they cannot fit in the definition of a living organism.

They just have a genetic material encapsulated in protein coats and do have defined cell structures, unlike prokaryotes and eukaryotes.

Therefore, viruses are not contemplated to be living.

To learn more about viruses follow the link:

https://brainly.com/question/2818201

PLEASE HELP!! MULTIPLE CHOICE

Answers

genes control traits so when a gene is changed the trait changes

A

The answer should be A and C

In what phase do mosses spend most of their life cycle?

Answers

Answer: The familiar, green, photosynthetic moss plants are gametophytes. The sporophyte generation is very small and dependent on the gametophyte plant.

which of the following are photosynthetic organisms?​

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Answer:

Plants, algae, and a group of bacteria called cyanobacteria are the only organisms capable of performing photosynthesis (Figure 1). Because they use light to manufacture their own food, they are called photoautotrophs (literally, “self-feeders using light”).

when taking a blood pressure reading which reading indicates the greatest force on the walls of the artery?

Answers

Answer: Systolic blood pressure

Explanation:

Which of the following statements is not true about heterotrophs?
Group of answer choices

Heterotrophs are classified as consumers.

Heterotrophs are at the base of most food webs.

Heterotrophs cannot make their own food.

Heterotrophs can consume autotrophs.

Answers

Heterotrophs are consumers, cannot make their own foods, and have some of them have the capacity to consume autotrophs. Hence, they are not at the base of most food webs.

Heterotrophs are organisms that have no capacity to manufacture their own foods, unlike autotrophs.

They depend on other organisms for their foods. Hence, they are known as consumers, unlike autotrophs that are called producers.

Heterotrophs are of different types:

Herbivores: those that consume autotrophs onlyCarnivores: those that consume meat onlyOmnivores: those that consume both autotrophs and meat.

Thus, heterotrophs do not occupy the base of food webs. The base of food webs are mostly occupied by autotrophs, the producers.

More on heterotrophs can be found here: https://brainly.com/question/13420317?referrer=searchResults

Heterotrophs are at the base of most food webs is the statement that is false.

Heterotrophs are those that must consume organic matter from other living beings.

Autotrophic beings represent the base in the totality of the trophic cycles or food chains, since they constitute the producing link, they are capable of taking advantage of energy and inorganic matter to make their food.

Heterotrophs are characterized by not having the ability to produce their own food in their body, for this reason they need to consume the organic matter of other living beings.

Therefore, we can conclude that autotrophs are considered producers and are at the base of most food webs, while heterotrophs are considered consumers which could not survive without feeding on other organisms.

Learn more about heterotrophic organisms here:  https://brainly.com/question/1212341

it is 21,00 kilometers around the earth and the earth rotates in 24 hours how fast is it rotating

Answers

Answer: 21,000x24= 504,000 kilometers per hour.

Explanation: Hope that helped you.

is the bladderwrack ficus gardneri endangered?

Marine Bio.

Answers

Answer: Chromista

Explanation:

The scientific community disagrees about _______. A. The rate of global climate change b. The occurrence of global warming c. The need for action d. All of the above Please select the best answer from the choices provided A B C D.

Answers

The scientific community disagrees about the rate of global climate change (Option A). The occurrence of global warming is widely accepted by the scientific community.

Global climate change refers to the fluctuations in temperatures worldwide.

Global climate change is caused by the use of fossil fuels such as oil, coal and natural gas, which are known to be associated with the increasing concentration of greenhouse gases in the atmosphere.

The greenhouse gases include, among others, carbon dioxide (CO2) and methane (CH4).

Learn more in:

https://brainly.com/question/1204536

Answer:

a

Explanation:

what is the name given to a virus that attacks a bacterium?

Answers

Bacteriophage, which are also referred to as simply “phage” or a bacterial virus

The enzyme that builds the complimentary strand during replication.
helicase
replicase
polymerase
synthase

Answers

Answer:

polymerase

Explanation:

It wraps itself around a polynucleotide strand and attaches new nucleotides to the exposed nitrogenous bases

What three things might influence a slide when conditions are right? What types of material can make up a flow? (Site 1).

Answers

A slide can be influenced by friction, weight, and the angle of the slope. The materials that form flow generate less friction depending on the environmental conditions.

A slide is a movement that occurs when a fragment of soil/rock suddenly moves down a slope.

Slope stability is a factor influenced by the angle of the slope and the strength of the materials (e.g., rocks) on it.

The slide movement can ultimately be considered as a battle between friction versus gravity.

Learn more in:

https://brainly.com/question/15168022

What is a chronic disease?​

Answers

Answer:

A chronic condition is a human health condition or disease that is persistent or otherwise long-lasting in its effects or a disease that comes with time. The term chronic is often applied when the course of the disease lasts for more than three months.

Explanation:

A chronic disease is a disease which last for a very long time even the whole life time. Such diseases have a bad effect on our health and may lead to poor health. A person does not recover completely after suffering from a chronic disease.Chronic diseases lead to loss of weight or fatigue.Examples: elephantiasis, diabetes, cancer, etc.

Hope you could get an idea from here.

Doubt clarification - use comment section.

Please help!! What are Okazaki fragments?

Answers

Explanation:

Okazaki fragments are short sequences of DNA nucleotides (approximately 150 to 200 base pairs long in eukaryotes) which are synthesized discontinuously and later linked together by the enzyme DNA ligase to create the lagging strand during DNA replication.[1] They were discovered in the 1960s by the Japanese molecular biologists Reiji and Tsuneko Okazaki, along with the help of some of their colleagues

During DNA replication, the double helix is unwound and the complementary strands are separated by the enzyme DNA helicase, creating what is known as the DNA replication fork. Following this fork, DNA primase and DNA polymerase begin to act in order to create a new complementary strand. Because these enzymes can only work in the 5’ to 3’ direction, the two unwound template strands are replicated in different ways.[2] One strand, the leading strand, undergoes a continuous replication process since its template strand has 3’ to 5’ directionality, allowing the polymerase assembling the leading strand to follow the replication fork without interruption. The lagging strand, however, cannot be created in a continuous fashion because its template strand has 5’ to 3’ directionality, which means the polymerase must work backwards from the replication fork. This causes periodic breaks in the process of creating the lagging strand. The primase and polymerase move in the opposite direction of the fork, so the enzymes must repeatedly stop and start again while the DNA helicase breaks the strands apart. Once the fragments are made, DNA ligase connects them into a single, continuous strand.[3] The entire replication process is considered "semi-discontinuous" since one of the new strands is formed continuously and the other is not.[4]

[2]During the 1960s, Reiji and Tsuneko Okazaki conducted experiments involving DNA replication in the bacterium Escherichia coli. Before this time, it was commonly thought that replication was a continuous process for both strands, but the discoveries involving E. coli led to a new model of replication. The scientists found there was a discontinuous replication process by pulse-labeling DNA and observing changes that pointed to non-contiguous replication.

Answer:

but actually hope is going to read all of this

Explanation:

lol

what is dropped off at the lungs by the blood vessels

Answers

Answer:

carbon dioxide

Explanation:

Which of the following steps occurs in both cellular respiration and photosynthesis?

a. Krebs cycle

b. Light-Dependent reaction

c.glycolysis

d.electron transport chain

Answers

Answer:

I'm pretty sure the answer is B

What is reactivity and what does is have to do it chemistry

Answers

Answer:

In chemistry, reactivity is a measure of how readily a substance undergoes a chemical reaction. The reaction can involve the substance on its own or with other atoms or compounds, generally accompanied by a release of energy. The most reactive elements and compounds may ignite spontaneously or explosively.

( hope this helps!)

Help, please I'll give brainless but the answer got to make sense

Answers

Answer:it’s a machine to weave cloth

Reason: there was too much demand to do it by hand

Importance: it’s important because it changed the way people worked in the textile industry as they didn’t have to weave cloth by hand anymore and it saved tons of time

Reason: there was too much demand to do it by hand

An individual has a genotype of IBi. What is their blood type?

Answers

Answer:

type B

.................

a chromosome is best described as a _____________


a. gene that has more than one form

b. green cell found in many plants

c. strand of DNA containing genetic information

d. reproductive cell found in certain kinds of bacteria

Answers

Answer: the answer is C

The answer would be C

How does sympatric speciation differ from allopatric speciation?

Answers

Symaptric speciation is the formation of new species in populations that live in the same geographic area, while allopatric speciation occurs when the population is separated by a geographcial area. So, according to this: The difference between the sympatric speciation and the allopatric speciation is that sympatric speciation involves a behavioral barrier, while allopatric speciation involves a physical barrier.

Which characteristic of living organisms is similar to burning fuel in a car engine

Answers

Answer:

im sorry but there isnt engough information for me to answer this properly

Chemical energy, or in other words using an energy source to fuel us. Cars have gas, that’s what makes them “go”. We eat food, this is what makes us “go”.

1. There are 200 bones in the human body. 2. The skeleton is the structural arrangement of bones in the human body. 3. A bones are of the same shape. 4. Bones give shape to the body. 5. The backbones or spinal column are attached to the skull. the statements below.​

Answers

Answer:

Salmat po

Explanation:

sorry i can send the answer he said "We dont use rude word here, please change"

Other Questions
HELP PLEASE!! What are the answers, say the answers to the blanks and if you can please try to explain it please i failed algebra 3 times and i really need help Read the passage about the life of Clara Barton.Clara Barton was born on December 25, 1821, in Oxford, Massachusetts. As a child, Clara was very shy. She first found her calling while caring for her brother after he fell from a rafter in their barn. Despite the fact that most teachers were still men at the time, Clara became a teacher at the age of 15, as well as one of the first women to work for the federal government at the US Patent Office. In 1881, Clara opened the first chapter of the American Red Cross in the United States and served as its first president. The American Red Cross is a relief organization that offers assistance to victims of such disasters as the 1889 Johnstown Flood and the 1900 Galveston Flood. She served as president for 23 years before resigning amidst claims that money was being mishandled internally.The Civil War was a bloody war fought between the years 18611865. During the war, Clara sought to help the soldiers in any way she could. She collected needed supplies and distributed them to the Union Army. These supplies included items such as food, bedding, and clothing. However, Clara was not content to sit on the sidelines; she often risked her own life to care for soldiers wounded in battle. For these deeds, she was nicknamed the "Angel of the Battlefield. When the war ended in 1865, Clara worked for the War Department helping in various ways.A yearbook page for Clara Barton includes "Claras pet peeve: suffering of any kind. What image would best illustrate this statement?A. Band aids in the shape of the letter x. B. A smile. C. A statue of men standing in a line. B. A teacher. 1. On a rendez-vous----------- aroport What happens to Pink and Say in the Confederate camp, Andersonville? A Pink is killed and Say is imprisoned. B Both boys are returned to their outfits. C Say is killed and Pink is imprisoned. D Both boys are imprisoned for months. Marks: 1How much does a man weigh if it takes 60J of energy to climb onto atable that is 75cm tall?4500 N45 N80 N0.8 N What connection does the author draw between Bernays'campaigns and American culture? in the story the manipulation of the american mind How long will it take the hose to emit 12 quarts? 1. 6 seconds 2. 7 seconds3. 9 seconds4. 8 seconds Determine if these functions are even, odd, or neither What types of line is this in art?A. Leading lineB. Horizontal lineC. Diagonal lineD. Zig Zag lines *What is the relationship between DNA and gene expression? How do they depend on each other?* Pleas help wuickly with this question for studying for my math test 6. What does the Declaration of Independence say the new, independent states, have the right to do? A restaurant recorded the ages of customers on two separate days. You are going to write a program to compare the number of customers in their forties (ages 40 to 49). What is the missing line of code?customerAges = [33, 23, 11, 44, 35, 25, 35, 68, 51]count40s = 0for item in customerAges: _____; count40s = count40s + 1print("Forties:", count40s)if 40 > item > 49if 40 < item < 49if 40 = 49 The statement below is a quote by William R. Rehnquist a former Supreme court Justice. The statement demonstrates that he believed in which principle of American democracy?Quote: We start with first principles. The Constitution creates a Federal Government of enumerated powersa. rule of lawb. checks and balancesc. federalismd. popular sovereignty Why is it challenging to develop a problem statement for a project? completar:En la de un cuerpo slido no influye su . fffffrrrrreeeeee points you can have them! I need help on this question pls can someone help me with this question ILL GIVE BRAINLIEST ALGEBRA 2 There are several methods for solving quadratic equations. But why dont we use the same method every time? Wouldnt that be easier?What is your preferred method for solving quadratic equations? Describe the method in your own words and explain why you prefer it over the other methods.What are the limitations of your preferred method?Please follow these guidelines for your discussion posts:Write at least 150300 words.