1. The chief chemical neurotransmitter for the sympathetic nervous system is: a. Acetylcholine                c. Ephedrine b. Norepinephrine          d. Atropine 2. Unoxygenated blood flows from the...

1. The chief chemical neurotransmitter for the sympathetic nervous system is:

a. Acetylcholine                c. Ephedrine

b. Norepinephrine          d. Atropine

2. Unoxygenated blood flows from the inferior and superior vena cavae into the:

a. Left atrium                     c. Right ventricle

b. Left ventricle                d. Right atrium

3. One cardiac cycle occurs every _______ seconds.

a. 0.8 seconds c. 0.52 seconds

b. 0.5 seconds d. 1.2 seconds