Which describes step three of a muscle contraction?

Answers

Answer 1
The nerve impulse enters the T Tubules and Sarcoplasmic Reticulum, stimulating the release of calcium ions.
Answer 2

The answer is Actin and myosin are completely overlapped.

Good luck :)


Related Questions

How is E. coli like a paramecium
A both produce essential viatimins
B both are unicellular
C both have a contractive vacuole D both have a nucleoid

Answers

The answer is B both are unicellular.

E. coli and paramecium are both unicellular. And that is their only common characteristic. E. coli is a prokaryotic unicellular organism while paramecium is a eukaryotic unicellular organism. So, paramecium has nucleus and E.coli has a nucleoid. Neither of them produce essential vitamins. Contractive vacuoles are present only in paramecium.

E. coli is like a paramecium because both are unicellular.


Plants in grasslands would not benefit from adaptations that protect from gazing

Answers

False? If it's a true or false question? Plants in the grassland would most definitely benefit from adaptations that protect it from grazing because the grassland is mostly populated by grazers and being protected from that would further help the development of the species.

It is false that plants in grasslands would not benefit from adaptations that protect from grazing.

What is grazing?

To "graze" is basically to "feed on grass," as sheep, horses, as well as cows do in a meadow where they eat continuously but in small amounts.

In addition to eating little snacks all day long, people also occasionally graze.

In grasslands, grazing is a frequent hazard to plants, as well as many plant species have evolved defenses against herbivorous animals.

Many grassland plants have evolved to withstand the extreme environmental conditions that are typical of these environments, such as drought.

These adaptations may include deep roots that enable the plant to reach water that is located far below the surface or the capacity to go dormant during dry spells.

Thus, the given statement is false.

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Understanding the salinity of aquatic environments is unimportant in understanding the overall ecosystem

True or False.

Answers

The correct answer for the given statement above would be FALSE. Understanding the salinity of aquatic environment is IMPORTANT in understanding the overall ecosystem. Salinity has a huge effect on what species can exist in aquatic environments. The amount of salt present in the water can determine the impact of living organisms present on that area. Salinity can disrupt the entire food chain within an aquatic ecosystem. Hope this answer helps.

Answer:

The correct answer is False

Explanation:

What the medium for earthquake wave?

Answers

Earthquakes generate two different body waves, P waves and S waves. P waves can travel through solids, liquids, and gases. S waves can only travel through solids.

volume can be measured in liters or cubic meters true or false

Answers

yes! just took the quiz

A reaction occurs when solid X is placed into solution Y. As a result, the temperature of the new solution increases by 3°C. The temperature rises another 2°C when more of solid X is added to the solution. What does this indicate about the effect of adding more solid?

Answers

The right answer is a.it increased the number of molecular collisions.

Thermodynamic temperature is a formalization of the experimental notion of temperature and is one of the main magnitudes of thermodynamics. It is intrinsically linked to entropy.

Usually denoted T, the thermodynamic temperature is measured in kelvins (symbol: K). Often referred to as "absolute temperature", it is an absolute measure because it directly reflects the fundamental physical phenomenon that underlies it: the agitation of the particles constituting matter (translation, vibration, rotation, electronic energy levels ) there is a directly proportional relationship between the number of molecules present in a solution, the number of collisions (increased by the number of molecules), and the temperature (increased by the number of collisions).

What natural methods removes carbon dioxide from the atmosphere?

Answers

"Photosynthesis" is the natural method which removes Carbon Dioxide from the atmosphere

Hope this helps!

When analyzing relationships among a particular group of taxa, how does a biologist decide which trees are the most parsimonious?

Answers

Domain analysis techniques provide broad and general analysis results, but are not yet detailed and are still comprehensive. If what is desired is a result of analysis focused on a particular domain or sub-domain, the researcher must use taxonomic analysis techniques.

Further explanation

After the researcher analyzes the domain, the domain chosen by the researcher is then determined as the focus of the study, it needs to be deepened through data collection in the field. Data collection is carried out continuously through observation, in-depth interviews and documentation so that the data collected becomes a lot. This stage requires a taxonomic analysis.

At the taxonomic analysis stage, researchers attempt to understand certain domains according to the focus of the problem or research target. Each domain begins to be understood in depth, and divides it again into a domain, and from sub-domains are broken down into more specific parts until there is no more left, aka exhausted. At this stage of the analysis the researcher can explore important domains and sub-domains through consultation with literature to gain a deeper understanding.

Taxonomic analysis is an analysis that is not just a general exploration, but an analysis that focuses on a particular domain that is very useful to describe the phenomenon or problem that is the target of study. So the conclusion is that taxonomic analysis is an analysis of all data collected based on a predetermined domain. The results can be presented in the form of box diagrams, line and node diagrams.

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Class: high school

Subject: biology

Keywords : taxonomic analysis, techniques, exploration

IPS

will upvote anyone who answers.
What evidence was used to support the early spherical model of Earth? Select all that apply.

The shadow seen crossing the moon during an eclipse is curved

When sailing in the ocean there is no edge to sail off of

A person in the North does not see the same stars as a person in the South

Earth is most likely a similar shape to astronomical bodies perceived outside the earth

Answers

A.)The shadow seen crossing the moon during an eclipse is curved

B.)When sailing in the ocean there is no edge to sail off of

They both are your answer but remember the second one 'cause it is most important point who proved that Earth was a spherical instead of flat.

Hope this helps!


Your Answers are B and C. I got my test on 100%

Students graphed the growth rate over several weeks of two plants in their classroom. The equations of both plants are given where x represents the time in weeks and y represents the heights of the plants in inches.
Plant A: y = 1.8x + 3.1
Plant B: y = 2.3x + 1.9
Approximately how many weeks will it take for both plants to reach the same height? Round your answer to the nearest tenth.
1.9 weeks
2.4 weeks
3.1 weeks
7.4 weeks

Answers

The answer is 2.4 weeks

x - the time in weeks
y - the heights of the plants in inches

When both plants to reach the same height, then yA = yB
y = 1.8x + 3.1
y = 2.3x + 1.9

2.3x + 1.9 = 1.8x + 3.1
2.3x - 1.8x = 3.1 - 1.9
0.5x = 1.2
x = 1.2 : 0.5
x = 2.4

Answer:

Answer is B

Explanation:

took it on edge, it was right.

Select all that apply.

The reactants of photosynthesis include _____.

glucose
solar energy
carbon dioxide
carbohydrates
water
chlorophyll
oxygen

Answers

solar energy
carbon dioxide
water

Answer: solar energy, carbon dioxide, water, chlorophyll

Photosynthesis is a natural process through which plants prepare their own food by utilizing atmospheric carbon dioxide, water and sunlight. This process occur specifically in the leaves of the plants. The sunlight is trapped by the chlorophyll pigment present in the chloroplast organelle of the present in the leaves. The food produce in the form of glucose and oxygen is produced as a byproduct of this reaction.

explain the process of mitosis in a tissue culture for cancer cells

Answers

Answer and explanation;

-Mitosis is a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.

-In tissue culture, cancer cells are taken from a living organism and grown in a culture. Cancer cells grow at an uncontrolled rate. Cancer cells do not stop growing when they are touching; they continue growing. Cancer cells grow multiple layers thick. Cancer cell growth differs from normal cell growth and the number of mitotic divisions are unlimited.

-Producing three or more daughter cells instead of normal two is a mitotic error called tripolar mitosis or multipolar mitosis (direct cell triplication / multiplication). Other errors during mitosis can induce apoptosis (programmed cell death) or cause mutations. Certain types of cancer can arise from such mutations.

Answer:

Explanation:

Cancer cells are taken from a living organism and grown in a culture.

Cancer cells grow at an uncontrolled rate.

Cancer cells do not stop growing when they are touching; they continue growing.

Cancer cells grow multiple layers thick.

Cancer cell growth differs from normal cell growth and the number of mitotic divisions are unlimited.

True or false: Migration doesn’t really affect population—it’s just a shifting of people from one place to another.

Answers

The correct answer of the given statement above would be FALSE. It is not true that migration doesn't really affect population. Migration affects population because if people come into another place, it changes that place's population. The place that they migrated will have an increase of population, and the place where they left will have a decrease of the population. Increase or decrease, this is still considered as a change. Hope this helps.
Final answer:

Migration significantly affects population sizes and can alter the genetic and demographic profiles of populations. It can be voluntary, involuntary, or forced, with diverse effects on the places people leave and the places they settle in.

Explanation:

The statement 'Migration doesn’t really affect population—it’s just a shifting of people from one place to another' is false. Migration does affect population sizes and compositions in both the areas people leave (emigration) and the areas they settle in (immigration). Factors such as the distance and choice of migration, whether it is voluntary, involuntary, or forced, can have significant effects on the demographic and genetic profiles of populations.

Migration not only involves the geographic movement of people but also the movement of alleles or the genetic variation within a population, which can influence genotype frequencies. Through human history, migration has been a cornerstone in the shaping of civilizations, cultures, and the genetic diversity observed in modern populations. Hence, dismissing migration as merely a 'shifting' glosses over its profound impacts on population demographics, culture, and biological diversity.

Explain how the experiments carried out by Van Helmont and Calvin contributed to our understanding of how nutrients cycle in the biosphere.

Answers

Water is a element that is continuously circulated in the biosphere. Van Helmont conducted an experiment on trees.  He weighed a willow tree of 5 pounds and placed it in a earthern pot containing 200 pounds of soil. Over five years, he only added distilled water and rain water to the pot and weighed the tree showing a weight of 169 pounds and while the soil had lost few ounces of weight. This concluded that the tree grew up using water alone as he was unaware of photosynthesis.

Melvin Calvin discovered the important process of photosynthesis called the Calvin cycle or the light-independent reaction. In this cycle, the carbon atoms from the carbon dioxide are fixed and used to build the three carbon sugars in association with the ATP and NADPH produced in the light reaction of the photosynthesis. Thus, proving that photosynthesis is the source of nutrition to the plants and responsible for the growth of the plants.

Neurons have _ forms

A) Different
B) the same

Answers

b=the same , but a different charger

how would the cuticle and stomata work together to maintain the leaf's function

Answers

They waxy cuticle keeps water inside the leaf cells. Tis water is then used for photosynthesis. ... Suggest a way in which the stoma and guard cells arrangement might work to control the amount of water that is leaving the leaf. The guard cells regulate the opening and closing of the stomata.
The stomata is the opening in the leaf that regulates what enters and exits. These holes go through the waxy cuticle, the covering of the leaf. The cuticle prevents things from entering and exiting the leaf. The stomata regulates the amount that DOES go in and out by opening and closing.

What are mitochondria?

Answers

Mitochondria are organelles in eukaryotic cells enclosed by 2 membranes. The outer membrane encloses the mitochondria while the inner membrane folds and creates structures called cristae. The function of mitochondria is the production of energy in the form of ATP. Also, mitochondria have their own genetic material similar to bacterial genome.

A mitochondria is like a powerhouse of a cell. They provide most of the cell's energy to do certain things.

Which sphere does a dolphin swim in?

A.
atmosphere

B.
lithosphere

C.
magnetosphere

D.
hydrosphere

Answers

hydrosphere is where a dolphin swims and lives in. It is defined as a mass of water, and includes the ocean.

help please!

The approximate age of Earth is:


6,000 years

150,000 years

4.5 billion years

13.5 billion years
2.
On Aristotle's Scala Naturae, humans were:


on the bottom rung

on the top rung

on the same rung as animals

lower than plants
3.
Which of these ideas is not a central theory for modern biology?


evolution

creationism

cell theory

gene theory

Answers

4.5 billion years
On the same rung as animals and lower than plants
Creationism

Answer:

4.5 billion

On the top rung

creationism

Explanation:

If you look at this website then you will see that humans are on the top rung https://sites.google.com/site/aristotlethebiologist/aristotle-s-biology/great-chain-of-being

Where does digestion take place

Answers

Digestion starts in the mouth when you're chewing, then the stomach, then small intestines.  
Digestion of starch begins in the mouth with the chewing of food (mastication) and the production of amylases immediately breaking down certain starches. The lining of the stomach produces hydrochloric acid (HCl). This acidic environment is critical for helping eliminate unwanted bacteria as well as initiating the digestion of proteins. The small intestine is specifically designed to maximize the digestion and absorption process. The majority of carbohydrate digestion occurs in the small intestine. It is here that disaccharides (sugars composed of two monosaccharides) like sucrose, maltose, and lactose are broken down into monosaccharides, which are then absorbed directly into the cells that form the intestinal lining.

Hope this answer helps! feel free to ask any additional questions :)

Activities that you perform each day require more muscle endurance than other muscular factors.
True
False

Answers

True! Activities that you perform each day require more muscle endurance than other muscular factors.

Answer: the answer is true

Explanation:

What is it called when scientists state whether their data confirmed or rejected the hypothesis?
   
A. Making a prediction
   
B. Drawing a conclusion
   
C. Stating a problem
   
D. Collecting data

Answers

B. drawing a conclusion
Drawing a Conclusion is where scientists state whether their data confirmed or rejected the hypothesis. So you answer is B. Hope this helps :)

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In the Arctic Ocean, there are very few large aquatic plants. Which of the following best explains why?
How does precipitation in a temperate forest compare, in general, to that in a tropical rainforest?

a. Currents are too strong for plants to survive.
b. Plants are unable to attach to the deep sea floor.
c. Plants have a difficult time surviving due to long periods of darkness.
d. Sea ice increases the salinity of the water to a level not suitable for plants. ...?

Answers

The best and most correct answer among the choices provided by your question is the third choice or letter C.

Plants have a difficult time surviving due to long periods of darkness explains why in the Arctic Ocean, there are very few large aquatic plants. 

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

Answer:

c

Explanation:

dw its right

Which of the following statements about a compound is true?
A. The physical and chemical properties of a compound are usually very different from those of the elements from which it is formed.
B. Only the physical properties of a compound are usually the same as those of the elements from which it is formed.
C. Only the chemical properties of a compound are usually the same as those of the elements from which it is formed.
D. The physical and chemical properties of a compound are usually the same as those of the elements from which it is formed.

Answers

The answer is A.Hope this helps

The following are true statements about a compound: The physical and chemical properties of a compound are usually very different from those of the elements from which it is formed and are present in Option A.

What are the properties of the compound?

In general, the physical and chemical properties of a compound are different from those of the elements, and this is because of the arrangement of the atoms in the compound, for example, water has two atoms, such as hydrogen and oxygen, and the same two atoms are present in hydrogen peroxide, but these two have completely different arrangements and properties.

Hence, the following are true statements about a compound: The physical and chemical properties of a compound are usually very different from those of the elements from which it is formed and are present in Option A.

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The widespread loss of wetlands would have little effect on the overall health of the environment.

True or False?

Answers

its false/////////////

Answer: False

Explanation:

The wetlands are the shallow land regions which are occupied with water seasonally, permanently or temporary. These receives water from sources like river, lakes, ponds, rain and melting of glaciers.

The widespread loss of wetlands would have little effect on the overall health of the environment is a false statement because of the fact that wetlands can effect the climatic condition of a region as well these also maintain the biodiversity of the locations where they form. If the wetlands are lost the climatic condition of the locations will be adversely affected and the biodiversity will be reduced.

3. Mitosis and meiosis are similar processes, but they have some very important differences. Explain how mitosis and meiosis are alike and how they are different. Provide at least two similarities and three differences

Answers

Mitosis is the reproduction of daughter cells making clones. This happens in the process of asexual reproduction. Meiosis is where you half a single cell with half the original amount of genetic information, you would have two of these to form what you need and there called the sperm and egg. This is sexual reproduction. I know that for the first part the off spring is exact clones and the second you have parts of both parents mixed in

Answer:

His answer is perfect do not copy it directly or u will fail

Explanation:

Which statement is true about a cell?








A.
The smallest living things are cells.







B.
All known living things are made of multiple cells.







C.
Cells stop producing once adulthood is reached.







D.
Organs produce cells.

Answers

Cells are the smallest living thing.

So, option A is your answer.

Hope this helps!
A.
The smallest living things are cells.

Good luck!

The process of replication is very accurate. there are about ___ Error in Every ______ Bases.

Answers

Here are the answers that would best complete the given statement above. The process of replication is very accurate. There are about 1 error in every 1 000 000 000 bases. A change in the nucleotide sequence  is known as a mutation.  These errors may be caused when enzymes fail to “proofread “ properly, or they may be caused by outside sources such as carcinogens. Hope this answer helps.

Answer:

The process of replication is very accurate. there are about 120,000 Errors in Every 6 Billion Bases.

A specific mutation in a certain animal leads to abnormal development of the heart and kidney, resulting in miscarriage. Why did this happen?

Answers

Answer:

This most likely happened because "Nature kills the weaker organisms and selects only the strongest organisms, which can survive and flourish" although it should be clear that nature didn't cause this mutation, is "chose" not to select it

Explanation:

What is a characteristic of body cells that requires large amounts of energy?

Answers

They have a large number of Mitochondria. 
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Rewrite the equation in slope-intercept form. Is 5 a prime composite or neither i need the answer to 10 please help A computer virus is eating disk space. during the first day it eats 1/2 of the disk. during the second day, it eats 1/3 of the remaining disk space. the third day it eats 1/4 of what still remains and the fourth day it eats 1/5 of what is left. what fraction of the original disk space remains intact? How does voting ensure "the consent of the governed"? What method can researchers employ in order to counter bias in their sampling?a. snowball sampling b. weighting c. convenience sample d. non-random surveying If p(x) = x2 1 and q(x)=5(x-1), which expression is equivalent to (p q)(x)?5(x 1) x2 1(5x 1) (x2 1)(x2 1) 5(x 1)(x2 1) 5x 1 According to quindlen, slavery and sweatshops, the burning of crosses illustrate america's Wind is caused by which type of heat transfer? Radiation/conduction/or convection Which function has a removable discontinuity?a. g(x)=(2x-1)/(x)b. p(x)=(x+2)/(x-x-2)c. f(x)=(5x)/(x-x)d. h(x)=(x-x+2)/(x+1) ...? how much is 2/7 of 1 and 3/4 How is Cassy's story connected with the themes of the book? Choose two examples and explain how they evoke a specific theme. Your response should be at least 150 words. He always leave the lights on and never wash the dishes,despite warnings that he need to help out around the house. What is wrong in this sentence? The metal in a penny is worth about 0.505 cents. How many cents is this written as a fraction in simplest form? 0.505 cents Find each sum vertically find the amount that results from each. $50 invested at 6% compounded monthly after a period of 3 years ...? The ratio of the number of cats to the number of dogs in an animal shelter was 2:3. After 120 cats were adopted, the ratio of the number of cats to the number of dogs became 3:7. Find the total number of cats and dogs in the animal shelter in the end? Harry just got a new job that requires him to transfer from a tropical climate to a continental climate. He is shopping for clothes that will help him adapt to his new climate. What should Harry purchase? Is y=4x-5 proportional or nonproportional? f a computer costs $600.00 and the sales tax rate is 7.5 percent, what is the total cost of the computer?