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Muscle Contraction: Cross Bridge Cycling Quiz

Authored by Kimberly McCarter

Other

12th Grade

Muscle Contraction: Cross Bridge Cycling Quiz
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What triggers the sarcoplasmic reticulum to release calcium ions?

Troponin

Myosin

Tropomyosin

An action potential

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when calcium ions bind to troponin?

Tropomyosin rolls off the myosin-binding sites

Myosin head cocks

Myosin pulls actin toward the M-line

ATP binds to myosin

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of troponin in muscle contraction?

To change shape and roll tropomyosin off the myosin-binding sites

To form a cross-bridge between myosin head and myosin-binding site

To release calcium ions

To block the myosin-binding sites

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the name of the step where myosin pulls actin toward the M-line?

Step 1

Step 6

Step 5

Relaxed sarcomere

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the function of ATP in cross bridge cycling?

To grab actin

To release actin

To break the cross-bridge

To pull actin toward the M-line

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the memory hook for step 4 of cross bridge cycling?

GRAB

PULL

ON

RELEASE

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the memory hook for step 5 of cross bridge cycling?

PULL

ON

GRAB

RELEASE

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