Describe the events that occur from the time calcium ions enter the axon terminal at the neuromuscular junction until muscle cell contraction occurs.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

b. Stimulation by a motor neuron before a muscle fiber has fully relaxed results in a condition called wave summation.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

d. A muscle fiber changes length during isotonic concentric and isotonic eccentric contractions.