Question

1. read to me

backward flow at the semilunar valves is called ____.
worth 4.000 points.
a. insufficiency
b. unidirectional flow
c. contraction

1. read to me

a good time for an accurate resting heart rate is in the ____.
worth 4.000 points.
a. evening
b. afternoon
c. morning

Explanation:

Question 9

To solve this, we analyze each option:

• Option A: Valvular insufficiency (or just insufficiency) refers to the backward flow of blood at valves (including semilunar valves) due to valve dysfunction.
• Option B: Unidirectional flow is the normal forward flow of blood, not backward.
• Option C: Contraction refers to muscle shortening (like cardiac muscle contraction), not related to backward flow at valves.

So the correct answer is A as it matches the definition of backward flow at semilunar valves.

To determine the best time for an accurate resting heart rate:

• Option A: Evening may have had daily activities affecting heart rate, so not ideal.
• Option B: Afternoon also has potential activity influence.
• Option C: Morning, right after waking up (before any physical activity or caffeine, etc.), is when the body is most at rest, making it the best time for an accurate resting heart rate.

Thus, the correct answer is C.

Answer:

A. Insufficiency

Question 10