A) Increase in the distance between Z lines
B) Lengthening of the sarcomere
C) Reduction of the H zone
D) Reduction of the A band
E) Decrease in the area of actin and myosin overlap

A) dark color of myosin.
B) multiple nuclei per fiber.
C) regular arrangement of filaments.
D) dense array of microtubules.
E) dense packing of ATP molecules.

A) Signals from nerve impulses may be blocked from initiating an action potential in the muscle cell membrane.
B) An action potential may be prevented from traveling down the T tubules.
C) Calcium pumps in the sarcoplasmic reticulum may be blocked from releasing calcium into the sarcoplasm.
D) Increases in calcium concentration in the sarcoplasm may not lead to cross-bridge formation between actin and myosin.
E) Both c and d