Question

1.
normal heart function depends on blood flowing in only one direction, which is called ____ flow.
worth 1.000 points.

a. bidirectional

b. insufficient

c. unidirectional

2.
the valves between an atrium and a ventricle are called ____.
worth 1.000 points.

a. semilunar

b. pulmonic

c. atrioventricular

Explanation:

Question 1

The question is about heart function and blood flow direction. "Unidirectional" means flow in one direction, which matches the description of normal blood flow in the heart. "Bidirectional" would mean two directions (incorrect), and "insufficient" refers to inadequate flow (not about direction).

Valves between an atrium and a ventricle are called atrioventricular valves. Semilunar valves are between ventricles and arteries, and "pulmonic" is a type of semilunar valve (for the pulmonary artery), not between atrium and ventricle.

Answer:

C. unidirectional

Question 2