Properly controlled skeletal muscle contractions produced by changing the frequency of stimulation and the strength of stimulation are referred to as __________.

Which of the following substances increases in quantity during repetitive muscle contraction during oxygen deficit?

What would occur if a contracting muscle became totally depleted of ATP?

Which of the following does NOT occur during skeletal muscle contraction?

A motor neuron along with all the muscle fibers it supplies is called a(n) __________.

The sites where the motor nerve impulse is transmitted from the nerve endings to the skeletal muscle cell membranes are thea. neuromuscular junctions,b. sarcomeres,c. myofilaments,d. Z discs.

Contraction elicited by a single brief stimulus is calleda. 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 calleda. a twitch,b. temporal summation,c. multiple motor unit summation,d. fused tetanus.

During muscle contraction, ATP is provided bya. a coupled reaction of creatine phosphate with ADP,b. aerobic respiration of glucose, andc. 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?