Muscle Contraction, the 14 steps

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Last updated 4:37 AM on 7/7/26
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14 Terms

1
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#1

Nerve impulse, motor neuron

2
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#2

Synaptic vesicles release ACH neurotransmitter

3
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#3

ACH moves across synaptic cleft

4
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#4

ACH binds with receptors on sarcolemma

5
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#5

Sodium channels open on sarcolemma and sodium rushes in

6
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#6

Increase in sodium changes resting membrane potential, causes an action potential

7
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#7

Action potential travels down sarcolemma and T tubules

8
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#8

Action potential causes calcium to be released from sarcoplasmic reticulum

9
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#9

calcium binds with troponin

10
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#10

Troponin-tropomyosin complex forms revealing myosin binding sites on the actin filament

11
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#11

ATP hydrolysis causes myosin “club” heads to attach to actin binding sites

12
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#12

Power stroke occurs

13
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#13

ATP hydrolysis causes myosin head to detach from actin binding site

14
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#14

Muscles relax, ADP converted to ATP, calcium returns to SR, ACHase breakdown ACH