The Semilunar Valves Are Closed When

question 79

Multiple Choice

The semilunar valves are closed when

• A) atria are contracting.
• B) the ventricles are relaxing.
• C) the atrioventricular valves are closed.
• D) the ventricles are contracting.

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Definitions:

Conservation

The act of preserving, protecting, or restoring the natural environment and wildlife to prevent depletion or destruction.

Barrier

An obstacle that prevents movement or access, or a circumstance or issue that prevents people from understanding each other or from achieving their goals.

Preoperational Period

A stage in Jean Piaget's theory of cognitive development (approximately ages 2-7) during which children begin to engage in symbolic play and struggle with logic.

Reality

The quality or state of being actual or true and the totality of all things possessing actuality, existence, or essence.