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

What is the wresting move for a war front

Answers

Answer:

I think it's a Power slam-

Explanation:

Sorry if it's wrong

ill give brainlietst and 50 points
Drag each tile to the correct location on the chart.
Determine whether each statement describes mitosis, meiosis, or both mitosis and meiosis.

Answers

Answer:

DNA replicates in both mitosis and meiosis, Mitosis occurs during growth and development, In meiosis the number of chromosomes reduce by half, Mitosis occurs in all organisms, Meiosis occurs in organisms that sexually reproduce, and chromosomes stay the same in Mitosis.

Explanation:

Mitosis: Occurs during growth and development, Occurs in all organisms, and The number of chromosomes remains the same

Meosis: The number of chromosomes reduces by half, and Occurs in organisms that sexually reproduce

Both: The DNA is replicated.

1. The DNA is replicated: Both Mitosis and Meiosis. In both processes, DNA replication occurs before the division of cells, ensuring that each daughter cell receives a complete set of genetic information.

2. Occurs during growth and development: Mitosis is the process responsible for the growth, repair, and development of multicellular organisms by producing identical daughter cells.

3. The number of chromosomes reduces by half: Meiosis involves two divisions that result in the reduction of chromosome number by half, leading to the formation of gametes (sperm and egg cells) with half the usual number of chromosomes.

4. Occurs in all organisms: Mitosis is a fundamental process occurring in various organisms, ranging from unicellular to multicellular, for growth, tissue maintenance, and asexual reproduction.

5. The number of chromosomes remains the same: In mitosis, the daughter cells have the same number of chromosomes as the parent cell, maintaining the chromosome count.

6. Occurs in organisms that sexually reproduce: Meiosis is specific to organisms that reproduce sexually, as it produces genetically diverse gametes that contribute to the variability of offspring.

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please help :( How are the steps of cellular respiration different when it is anaerobic respiration?

Answers

Answer: HEYYYY also if I’m correct anaerobic respiration doesn’t need oxygen maybe I’m wrong id.k

Explanation:

Please select the word from the list that best fits the definition

Preserved animal tracks are called ______ fossils.

Answers

Answer:

A Trace Fossil

Explanation:

Mark as Brainliest Answet

Trace fossils

Trace fossils include footprints, trails, burrows, feeding marks, and resting marks. Trace fossils provide information about the organism that is not revealed by body fossils.

The controls the materials that enter and
leave the cell.

Answers

Cell membrane is the answe

what solution, (hypertonic, hypotonic, isotonic) would make osmosis go faster?

Answers

Answer:

Explanation:

Osmosis is the movement of WATER molecules across a semipermeable membrane (such as the cell membrane) from where there is a high concentration of water to where there is a low concentration of water. The interior of a living cell consists of cytoplasm, which is a solution of mostly water with dissolved substances such as salt.  

Now for the fun stuff!  An Isotonic solution is a solution that has the same concentration of dissolved substances as is found inside the cell.  If a cell is surrounded by isotonic solution, then there is no net movement of water across the membrane by osmosis, because the concentration of water is the same on both sides of the membrane.

A hypertonic solution is a solution with a higher concentration of dissolved substances than is found inside the cell.  If a cell is surrounded by hypertonic solution, then water will move OUT of the cell by osmosis because there is a higher concentration of water inside the cell compared to outside (where there is lots of dissolved salt, etc.)  A cell in hypertonic solution will shrink.  

A hypotonic solution is a solution with a lower concentration of dissolved substances than is found inside the cell.  If a cell is surrounded by hypotonic solution, then water will move INTO the cell by osmosis because there is a higher concentration of water outside the cell compared to inside.  A cell in hypotonic solution will swell up and, if there is no cell wall, may burst.  A silly but simple way to remember that water moves into a cell in hypotonic solution is that "hypo causes the cell to swell up like a hippo"

how is cytokinesis different in plant and animal cells

Answers

Answer:

The main difference between plant cell and animal cell cytokinesis is the formation of new cell wall surrounding the daughter cells. Plant cells form a cell plate between the two daughter cells. In animal cells, a cleavage furrow is formed between the two daughter cells.

is the bladderwrack ficus gardneri endangered?

Marine Bio.

Answers

Answer: Chromista

Explanation:

ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd

Answers

Answer:

ddddddddddddddddddd

Explanation:

ddddddddddddddddddddddddddddddddddddddd

dddddddddddddddddddddddddddddddddddddd

ddddddddddddddddddddddddddddddddddddddd

dddddddddddloldddddddddddddddddddddddddd

Which two systems below work together to rid the body of harmful parasites?

skeletal and circulatory systems
immune and lymphatic systems
muscular and nervous systems
respiratory and immune systems

Answers

Answer:

Immune and Lymphatic Systems

Explanation:

people who have come back from being legally declared dead. what was your experience

Answers

my friend told me that one his friend uncles was in a car crash not in a bad one but it did send his uncle flying it hit his head and there was alot of blood people thought he was dead but after like a few hours in the doctor he just opened his eyes but still couldnt move

Suppose two leaf-eating species of animals live in a habitat where there is a severe drought and many plants die as a result. Which term describes the kind of relationship the two species probably will have?.

Answers

Competition is the kind of relationship these two leaf eating species of

animals will have.

Competition involves organisms vying for resources such as food, sunlight,

space etc in the ecosystem. The two leaf eating animal species are in

competition with each other for plant leaves.

When drought occurs and the leaves reduces, competition for food

increases in which the fittest survive and the less fit ones die from starvation.

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6. What are three characteristics of Earth that make it suitable for life?

Answers

Answer:

atmosphere water and temperature

what does thermohaline circulation have in common with coastal upwelling

Answers

Answer:

Coastal upwelling is the process by which strong winds blow down the coasts of continents and, in conjunction with the earth's rotation, cause the surface waters to be pushed offshore. Water from the ocean depths is then pulled up - or upwelled - to the surface to take its place

urea and uric acid are products of the breakdown of:

Answers

I think it’s proteins and nucleic acids

How long do scientists estimate that the sea has been at its current level?
250 years
2,500 years
25,000 years
250,000 years

Answers

Answer:

250,000

Explanation:

Answer:

A. 250 years

Explanation:

NASA measures sea level around the globe using satellites. The Jason-3 satellite uses radio waves and other instruments to measure the height of the ocean's surface – also known as sea level. It does this for the entire Earth every 10 days, studying how global sea level is changing over time.

the energy required for a seedling to push up out of the ground comes from

Answers

Answer:

Food Storage in the Seed

Explanation:

Seeds require oxygen in order to create energy for germination and development. The embryo obtains energy by decomposing its dietary reserves. This is accomplished, as in other creatures, by a process called as aerobic respiration. —a sequence of processes in which energy is released from glucose using oxygen.

Which statement best describes what is occurring in the diagram

A- DNA is being replicated
B- RNA is being used as a template
C- RNA serves a template to synthesize
D- DNA serve as a template to make a strand of mRNA

Answers

Diagram isnt on the question so i cant answer it

true or false? a flood that separates a population of frogs onto opposite sides of a lake is an example of a vicariance event that may result in allopatric speciation.

Answers

Answer:

true

Explanation:

Match each part of the lymphatic system with the correct label.

Answers

Answer:

1 Cervical Lymph Nodes

2 Right Lymphatic Duct

3 Axillary Lymph Nodes

4 Thoracic Duct

5 Cisterna Chyli

6 Peyer's Patches

7 Inguinal Lymph Nodes

Explanation: are correct

Answer:

1 Cervical Lymph Nodes

2 Right Lymphatic Duct

3 Axillary Lymph Nodes

4 Thoracic Duct

5 Cisterna Chyli

6 Peyer's Patches

7 Inguinal Lymph Nodes

Explanation:

What do lung cancer And emphysema have in common

Answers

Answer:

While emphysema and lung cancer are two different conditions, they do share some associations and share the main risk factor for both which is cigarette smoking. Both can lead to immune system malfunction, inflammation, and cell damage which play a role in the development of the two diseases. so they both be come from the cause of smoking

Explanation:

Answer:

Both are caused by smoking.

Explanation:

which zone in the ocean contains enough light for photosynthesis?

Answers

Answer:

The euphotic zone

The euphotic zone is the layer closer to the surface that receives enough light for photosynthesis to occur.

someone pls help ill give brainliest
Use the terms below to label the components in the diagram below:

ribosome; amino acid; tRNA; mRNA; DNA template; codon;

anticodon; polypeptide chain or protein

Answers

Answer:

Hope fully this sheet will be able to help you

Explanation:

Individuals, as well as industry—and automobile manufacturers in particular have an obligation to work to reduce carbon dioxide emissions that may increase the level of greenhouse gases in the atmosphere. Agree or disagree

Answers

Agree because we need to look ahead into the future. We may have a normal life with not much negative effects but the future generations to come will. Plants will die causing animals to die with them. Good will become scarce and oxygen in the atmosphere will decrease.

It is right that individuals, as well as industry—and automobile manufacturers, in particular, have an obligation to work to reduce carbon dioxide emissions that may increase the level of greenhouse gases in the atmosphere.

Carbon dioxide is a greenhouse gas, which means that it traps heat in the atmosphere. This can lead to climate change, which is already having a number of negative effects on the planet, such as rising sea levels, more extreme weather events, and changes in plant and animal life.

Individuals can reduce their carbon dioxide emissions by making changes to their lifestyle, such as driving less, using less energy at home, and eating less meat. Industry can reduce their carbon dioxide emissions by investing in new technologies, such as renewable energy and energy efficiency.

Automobile manufacturers have a special responsibility to reduce carbon dioxide emissions, as cars are a major source of greenhouse gases. They can do this by designing more fuel-efficient cars and by using alternative fuels, such as electric and hybrid cars.

It is important for everyone to do their part to reduce carbon dioxide emissions. By working together, we can help to protect the planet for future generations.

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Explain the correlation between solar radiation and kelp biomass .

Answers

Answer:

icicles icicles icon DM irks an ignitor

A scientist hypothesizes that increasing the amount of salt in a body of water will decrease the number of plants that can live in the water. What is the independent variable?
Group of answer choices

Amount of salt

Amount of water

Temperature of the water

Number of plants in the water

Answers

Dependent and Independent variables are regarded as variables in mathematical and statistical modeling and of course in some other aspects.

The independent variable is this case is the amount of salt.

In this kind of scenario, one can think of independent and dependent variables in terms of cause and effect.  An independent variable is the variable we assume to be the cause, while a dependent variable is assumed as the effect. Therefore, with this case, the amount of salt would cause a decrease in the number of plants. While the effect of increasing the amount of salt would be seen in the number of plants.

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within the oral cavity, both mechanical and chemical ________ begin.

Answers

Answer:

digestion

Explanation:

there is no explanation

The pedigree below depicts a dominant trait. What is the genotype of individual I-1 (use the letter A for a dominant allele and a for a recessive allele)? How did you come to this conclusion? Using your best grammar, write 3-5 sentences.

Answers

A pedigree chart is a diagrammatic representation showing the occurrence and appearance of phenotypes of a particular gene/traits and its ancestors from one generation to the next establishing relationships between individuals in a family.

Using the letter A for a dominant allele and a for a recessive allele, the genotype of individual I-1 is Aa.

In the key pedigree nomenclature, an individual marked with the black ink is affected with the trait (and this trait is dominant - A). Looking at the F1 generation, there are males affected and females as well. For inheritance of the trait, just one copy is enough to become affected. Therefore, the male parent is heterozygous for the trait and the female normal (aa) to enable the production of both affected and non-affected individuals.

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BEST ANSWER GETS BRAINLIEST

What is a polar molecule?

Answers

Answer:

a polar molecule is a molecule that has a charge on one side of the molecule, that is not cancelled out.

Explanation:

i hope this helps you!

Answer: a molecule that has both positive and negative ions

Explanation: a water molecule has an oxygen element and 2 hydrogen elements the oxygen is a negative ion and the hydrogen ions are positive

Oxygen is made during photosynthesis. (True or False)

Answers

Answer:

True

Explanation:

True

Ans: True
Explanation: oxygen is produced as a by-product during photosynthesis
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