The First Heart Sound "Lub")

question 172

Multiple Choice

The first heart sound "lub")

• A) is associated with closing of the mitral valve.
• B) is associated with atrial systole.
• C) is associated with opening of the mitral valve.
• D) is associated with closing of the aortic valve.
• E) is associated with opening of the aortic valve.

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Definitions:

Correlational Study

A descriptive study that looks for a consistent relationship between two phenomena.

Consistent Relationship

A stable and reliable connection between individuals or variables, where patterns of interaction or correlation are predictable over time.

Positively Correlated

A relationship between two variables where an increase in one variable is associated with an increase in the other variable.

Students' Heights

The measurement of how tall students are, often collected for health, research, or administrative purposes.