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ollegr [7]
3 years ago
10

The cell membrane forms a protective barrier between the external and internal environments. It is referred to as ______________

_____, because it allows some substances to cross more easily than others and blocks other substances from crossing into the cell.
Biology
2 answers:
Lesechka [4]3 years ago
8 0
Semi-permeable. It is partially permeable to substances passing through.
harina [27]3 years ago
5 0
Selectively Permeable
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during what phase of a muscle twitch chemical changes such as the release of calicum are according intracelluary as rthe muscles
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<u>During </u><u>latent </u><u>phase of a muscle twitch chemical changes such as the release of calicum are according intracelluary as rthe muscles prepare for contractrion.</u>

What are the phases of a twitch contraction?

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What is a latent period ?

The amount of time that passes between an action potential being generated in a muscle cell and the beginning of muscular contraction.

What is a muscle twitch?

  • The fundamental reaction of a motor unit to a single stimulus is a muscle twitch. Muscle Twitch in three different states .
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What happens during latent period of muscle twitch?

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Learn more about latent period

brainly.com/question/10696517

#SPJ4

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2 years ago
Can someone help me with this question please
postnew [5]
The answer is B) 4IF3 Hope this helps!

Aye Sir!
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Epithelial tissues are the tissues that lines inside of hollow organs. <span> Epithelial tissues covers body surfaces; lines the body cavities and hollow organs.</span>
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