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anyanavicka [17]
2 years ago
10

What stimulates a skeletal muscle cell to contract?.

Biology
1 answer:
mars1129 [50]2 years ago
5 0
A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles. Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron.
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What is the main difference between the life cycles of members of phylum bryophyta and phylum pteridophyta?
morpeh [17]

Answer: mode of reproduction

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Phylum bryophyte lack true roots and they are non-vascular plants (no xylem and phloem tissues). They reproduce via gamates, the dominant reproductive phase in bryophyte is gametophyte.

4 0
3 years ago
During which process are food molecules broken down to produce chemical potential energy in the form of atp
Fittoniya [83]

Process that releases energy by breaking down glucose and other food molecules in the presence of oxygen, A complex set of chemical reactions involving an energy transformation where potential chemical energy in the bonds of "food" molecules is released and partially captured in the bonds of adenosine triphosphate

8 0
3 years ago
Many cells make and use an enzyme, called catalase, to facilitate the decomposition of hydrogen peroxide (H2O2). The products of
Len [333]

Answer:

A. It decreases the activation energy needed to start the reaction

Explanation:

Organic catalyst which speed up the rate of organic chemical reaction is living cells are called enzymes.They have specific reaction site called active sites.This must be in prefect shape with the substrate for the organic chemical reaction to take place

When this occurs the minimum amount of  energy of  reaction to  activate or stimulate  the the atoms and molecules of the substrate to undergo chemical reaction is  lowered.This energy of reaction is celled activation energy.

Catalase thought its active sites lowers the activation energy so that the molecules of H2O2 could break down to C02 and H2 faster,thereby reducing the time for theses product to form.The is the general roles of enzyme.To increase the rate of chemical reaction,by reducing the activation  energy.

8 0
3 years ago
Earth has roughly _________ times more atmospheric pressure than mars
zalisa [80]
Earth has roughly surface times more atmospheric pressure than mars.
Sorry if it's wrong i tried!
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hichkok12 [17]
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3 years ago
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