9. Muscle Tissue

True or False: if false, choose the answer that best corrects the statement.

The events of excitation-contraction coupling involve converting the electrochemical signal to the mechanical movement of contraction.

During an action potential, the phase where ___________ moves into the cell results in depolarization while the phase where ______________ exits the cell results in repolarization. 

What is the role of the calcium ion in the signaling of an action potential at the neuromuscular junction?

True or false: if false, choose the answer that best corrects the statement:

The motor neuron is in contact with the sarcolemma in order to efficiently pass the electrical signal to the muscle fiber.

The sites where the motor nerve impulse is transmitted from the nerve endings to the skeletal muscle cell membranes are the

a. neuromuscular junctions

b. sarcomeres

c. myofilaments

d. Z discs

Contraction elicited by a single brief stimulus is called:

a. A twitch

b. Temporal summation

c. Multiple motor unit summation

d. Fused tetanus

A smooth, sustained contraction resulting from very rapid stimulation of the muscle, in which no evidence of relaxation is seen, is called:

a. A twitch

b. Temporal summation

c. Multiple motor unit summation

d. Fused tetanus

During muscle contraction, ATP is provided by:

a. a coupled reaction of creatine phosphate with ADP

b. aerobic respiration of glucose, and

c. anaerobic glycolysis.

______ (1) Which provides ATP fastest?

______  (2) Which does (do) not require that oxygen be available?

______  (3) Which provides the highest yield of ATP per glucose molecule?

______  (4) Which results in the formation of lactic acid?

______  (5) Which has carbon dioxide and water products?

______  (6) Which is most important in endurance sports?