Which of the Following Is NOT True About Semilunar Valves

question 46

Multiple Choice

Which of the following is NOT true about semilunar valves?

• A) One is found at the entrance to the pulmonary trunk.
• B) Their closing causes the second, shorter "dub" sound of the heartbeat.
• C) They connect the atria and ventricles.
• D) One is found at the entrance to the aorta.
• E) They are composed of three half moon shaped flaps.

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Definitions:

Sonar

Sonar is a technique that uses sound propagation (usually underwater) to navigate, communicate, or detect other vessels by sending out pulses of sound and listening for echoes.

Echolocation

Determination of the position of objects by detecting echoes of high-pitched sounds emitted by an animal; a type of sensory system used by bats and dolphins.

Thermoreceptors

Sensory cells or nerve endings specialized in detecting variations in temperature, found in the skin and other parts of the body.

Lateral Line

A system of sense organs found in aquatic vertebrates, used to detect movements and vibrations in the surrounding water.