During the Cardiac Cycle, Why Do the Aortic and Pulmonic

question 15

Multiple Choice

During the cardiac cycle, why do the aortic and pulmonic valves close after the ventricles relax?

• A)Papillary muscles relax, which allows the valves to close.
• B)Chordae tendineae contract, which pulls the valves closed.
• C)Reduced pressure in the ventricles creates a negative pressure, which pulls the valves closed.
• D)Blood fills the cusps of the valves and causes the edges to merge, closing the valves.

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Definitions:

Variance

A measure of the dispersion or spread of a set of data points, indicating how much the values differ from the mean of the set.

Random Variable

A variable whose numerical value results from a random experiment, characterized by its possible values and associated probabilities.

Discrete Random Variable

A variable that has a countable number of possible values, often representing the outcomes of a categorical process.

Discrete Random Variable

A variable that assumes a countable number of distinct values, often representing counts or categorical data.