The structure which closes off larynx is

ATI RN

ATI RN Test Bank

The structure which closes off larynx is _________

A. Epiglottis B. Vocal cords C. Adam's apple D. Glottis

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Gas is exchanged in the alveoli by a process of _____.

A. simple diffusion B. active transport C. facilitated diffusion D. filtration

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

The _____ muscle can cause a forced exhalation.

A. diaphragm B. pectoralis major C. internal intercostal D. external intercostal

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Breathing is mainly controlled by the _____.

A. local alveoli B. medulla oblongata C. pons D. pneumotaxic center

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

What is the normal PO₂ of the alveolar air?

A. 40 mm Hg B. 45 mm Hg C. 104 mm Hg D. 50 mm Hg

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

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