In which phase of contraction do action potentials travel along the sarcolemma and down into the T-tubules, triggering the opening of voltage-gated Ca2+ channels on the sarcoplasmic reticulum?

The depolarization phase of the action potential is due to the entry of _____ ions into the cell, while the repolarization phase is due to the exit of _____ ions from the cell.

Adrenergic postganglionic neurons of the sympathetic nervous system use which neurotransmitter?

The somatic, efferent division of the nervous system would in in charge of:

List one benefit and one drawback of producing ATP via anaerobic fermentation. List one benefit and one drawback of producing ATP via aerobic respiration.

A structure that is located closer to the body midline than another structure is said to be __________ to that structure. 

The study of cells is known as what? List one tenant of cell theory.

Cardiac and smooth muscle have all of the following characteristics in common except:

In a(n) ____________ contraction, the amount of tension produced does not change, but the muscle changes in length, becoming shorter.  

Where in the body is smooth muscle located?