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True or False
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1
Muscle cells are called muscle fibers because of their coarse texture.
A)True
B)False
2
Skeletal and cardiac muscles are striated by filaments in their myofibrils.
A)True
B)False
3
Once a skeletal muscle contracts, it cannot relax until acetylcholine is secreted.
A)True
B)False
4
Acetylcholine causes skeletal muscles to contract.
A)True
B)False
5
Acetylcholinesterase is a neurotransmitter.
A)True
B)False
6
Smooth muscle contraction is stimulated by acetylcholine and norepinephrine.
A)True
B)False
7
Intercalated discs allow muscle fibers to contract separately.
A)True
B)False
8
Cardiac muscle must have nerve stimulation to contract and relax.
A)True
B)False
9
Norepinephrine increases the heart rate.
A)True
B)False
10
ATP can be defined as energy needed for muscle activity.
A)True
B)False





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