31) A common characteristic of the three types of muscle tissue is that
A) they all have striations.
B) contraction is triggered by the release of calcium.
C) they all contain sarcomeres.
D) they can all use aerobic and anaerobic methods to utilize energy.
32) Which of the following correctly defines a triad of the sarcomere?
A) a T tubule and two adjacent terminal cisterns
B) actin, myosin, and titin
C) an axon terminal, synaptic cleft, and sarcolemma
D) actin, troponin, and tropomyosin
33) Eccentric contraction
A) generates force as the muscle lengthens.
B) generates force without changing the length of the muscle.
C) pulls the insertion toward the origin.
D) shortens the muscle.
34) Sarcopenia is
A) the loss of muscle mass with age.
B) a decrease in the muscle's need for energy.
C) a decrease in the amount of actin in the muscle fiber.
D) a decrease in the amount of sarcolemma in the muscle fiber.
35) The embryonic origin of muscle tissue is from
A) endoderm.
B) mesoderm.
C) ectoderm.
D) epidermis.
36) As skeletal muscles enlarge in a weight lifter, all of the following occur
except
A) muscle cells divide mitotically.
B) muscle cells grow larger.
C) myofilaments become more abundant in the muscle cells.
D) myofibrils become more abundant in the muscle cells.
37) Delayed-onset muscle soreness is caused by
A) accumulation of lactic acid.
B) depletion of ATP during prolonged activity.
C) microscopic tears and resulting inflammation.
D) overnight cramps that occur after strenuous exercise.
38) Titin
A) connects myosin to actin.
B) forms the Z disk to which actin attaches.
C) limits the degree to which a muscle may contract.
D) prevents a muscle from being overstretched.
39) Visceral muscle refers to
A) skeletal muscle and cardiac muscle.
B) cardiac muscle and smooth muscle.
C) skeletal muscle and smooth muscle.
D) smooth muscle only.
40) The sarcoplasmic reticulum (SR) stores
A) calcium.
B) sodium.
C) ATPase.
D) myosin.