Of the following items listed below, which is the best description for why skeletal muscle stores glycogen.
A) Glycogen provides a smooth surface for filaments to slide on.
B) Glycogen is part of muscles rigid supporting framework.
C) Skeletal muscle is a heavy consumer of energy.
D) The glycogen is an insulating layer that helps regulate body temperature.
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Question 2) Myoglobin ________.
A) breaks down glycogen
B) is a protein involved in the direct phosphorylation of ADP
C) produces the end plate potential
D) stores oxygen in muscle cells
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Question 3) Oxygen starved tissues can release chemical signals into the blood that can change the diameter of nearby blood vessels delivering oxygen and nutrients to the tissues.
In doing so the blood vessels will respond through vasodilation (widening of the vessel). Which muscle type is responsible for this vasodilation?
A) skeletal muscle
B) striated muscle
C) smooth muscle
D) cardiac muscle
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Question 4) Which of the following is a factor that affects the velocity and duration of muscle contraction?
A) number of muscle fibers stimulated
B) muscle length
C) size of the muscle fibers stimulated
D) load on the fiber
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Question 5) Although all the anatomical parts of muscle work together to give it it's characteristics, which of the following proteins listed below would be most associated with the characteristics of contractility?
A) voltage gated sodium channels
B) thick (myosin) filaments
C) elastic (titin) filaments
D) potassium (K+) leak channels
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Question 6) Which of the following would be recruited later in muscle stimulation when contractile strength increases?
A) large motor units with small, highly excitable neurons
B) motor units with the longest muscle fibers
C) many small motor units with the ability to stimulate other motor units
D) motor units with larger, less excitable neurons
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Question 7) Which muscle cells have the greatest ability to regenerate?
A) no muscle can regenerate
B) smooth
C) skeletal
D) cardiac
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Question 8) Although all the anatomical parts of muscle work together to give it it's characteristics, which of the following proteins listed below would be most associated with the characteristics of extensibility?
A) elastic (titin) filaments
B) potassium (K+) leak channels
C) acetylcholine receptors in the motor end plate
D) thick (myosin) filaments
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Question 9) Although all the anatomical parts of muscle work together to give it it's characteristics, which of the following proteins listed below would be most associated with the characteristics of excitability?
A) acetylcholine receptors in the motor end plate
B) the Na+-K+ pump
C) actin of thin filaments
D) elastic (titin) filaments
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Question 10) What is the role of tropomyosin in skeletal muscles?
A) Tropomyosin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules.
B) Tropomyosin is the chemical that activates the myosin heads.
C) Tropomyosin serves as a contraction inhibitor by blocking the actin binding sites on the myosin molecules.
D) Tropomyosin is the receptor for the motor neuron neurotransmitter.
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