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Concept: Skeletal Muscle Contractions
Concept: Contraction Steps
Problem: Which of the following is not a structure of the sarcomere?
A band
H zone
Z line
U zone
Problem: Which of the following structures is composed of actin, but no myosin?
M line
I band
Problem: When calcium binds to troponin, what happens to tropomyosin?
It binds and covers the actin binding site
It is removed from the actin binding site
It creates a crossbridge structure
It triggers ATP hydrolysis and myosin movement
Problem: When a cross-bridge structure is formed during a muscle contraction, the band lengths shorten and contract.
True
False
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