Normal Heart Sounds Are Caused by Which of the Following

question 79

Multiple Choice

Normal heart sounds are caused by which of the following events?

• A) opening and closing of the heart valves
• B) friction of blood against the chamber walls
• C) closure of the heart valves
• D) excitation of the SA node

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Definitions:

Surgical Procedure

A medical intervention involving manual and instrumental techniques to treat injuries, diseases, or physiological disorders.

Behavior

Observable actions or responses of individuals or groups to stimuli in their environment, across biological or social spectrums.

Hypothalamus

A small but crucial part of the brain located below the thalamus, responsible for controlling many bodily functions, including hunger, thirst, sleep, and the release of hormones from the pituitary gland.