Contraction of Skeletal Muscle

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  • Created by: Molly
  • Created on: 23-03-14 17:54
What happens to the I band when a muscle contracts?
It becomes narrower.
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What happens to the Z lines when a muscle contracts?
The z lines become closer together.
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What happens to the H zone when a muscle contracts?
It becomes narrower.
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What types of protein are involved in the myosin?
A fibrous protein (the tail) and a globular protein (the head)
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What happens in muscle relaxation?
Calcium ions are actively transported into the endoplasmic reticulum using energy from hydrolysis of ATP. This allows tropomyosin to block the actin filaments again. Myosin heads are now unable to bind to actin filaments and the muscle relaxes.
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Other cards in this set

Card 2

Front

What happens to the Z lines when a muscle contracts?

Back

The z lines become closer together.

Card 3

Front

What happens to the H zone when a muscle contracts?

Back

Preview of the front of card 3

Card 4

Front

What types of protein are involved in the myosin?

Back

Preview of the front of card 4

Card 5

Front

What happens in muscle relaxation?

Back

Preview of the front of card 5

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