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:

Mental Maturing

The process of psychological and emotional growth, leading to more mature thought processes and behaviors.

Physiological Arousal

Refers to the physical responses of the body to stimuli, which may include increased heart rate, sweating, or heightened senses, often associated with emotions and stress.

Bystander-Calculus Model

A psychological framework explaining why individuals decide to intervene or not in emergency situations, based on personal cost-benefit analyses.

Affect-Cost Model

A theoretical framework explaining how emotions influence decision-making, particularly the evaluation of costs and benefits in social interactions.