Select the Correct Statement About the Heart Valves

question 49

Multiple Choice

Select the correct statement about the heart valves.

• A) Aortic and pulmonary semilunar valves control the flow of blood into the heart.
• B) The atrioventricular (AV) valves prevent backflow of blood added into the atria during ventricular contraction.
• C) The tricuspid valve divides the left atrium from the left ventricle.
• D) The mitral (bicuspid) valve separates the right atrium from the right ventricle.

---

Definitions:

ACh

Acetylcholine, a neurotransmitter involved in muscle activation, memory, and learning.

Flaccid Paralysis

A medical condition characterized by weakness or paralysis and reduced muscle tone without an obvious cause.

Acetylcholinesterase

An enzyme that breaks down the neurotransmitter acetylcholine, terminating its action at the neural synapse.

Action Potentials

Rapid and temporary changes in the electrical membrane potential of a cell, allowing for the transmission of signals along neurons.