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.

---

Definitions:

Electromyography

A diagnostic procedure to assess the health of muscles and the nerve cells that control them (motor neurons) by measuring electrical activity.

Muscle Activity

The physical action or movement produced by the contraction of muscles.

Brain-Wave Activity

The patterns of electrical activity in the brain, measurable by EEG, associated with different states of consciousness.

Restless Legs Syndrome

A neurological disorder characterized by an uncontrollable urge to move the legs, usually due to uncomfortable sensations.