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Which of the following structures is part of the glottis?

A.

Cricoid cartilage

B.

True vocal cords

C.

"Adam's apple"

D.

Thyroid cartilage

Answer and Explanation

The Correct Answer is B

a. Cricoid cartilage: This is a ring-shaped cartilage located below the thyroid cartilage, but it is not part of the glottis.

b. True vocal cords: The glottis consists of the true vocal cords (vocal folds) and the opening between them. The true vocal cords are essential for sound production.

c. "Adam's apple": This term refers to the prominent part of the thyroid cartilage, particularly in males. It is not part of the glottis.

d. Thyroid cartilage: This is the largest cartilage of the larynx and forms the front wall, but it is not directly part of the glottis.


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Related Questions

Correct Answer is A

Explanation

a. The volume of the cell decreases: When a red blood cell is placed in a hypertonic solution (solution with a higher concentration of solutes outside the cell compared to inside), water will move out of the cell through osmosis to equalize the concentration on both sides of the cell membrane. This movement of water causes the red blood cell to shrink (crenate).

b. The permeability of the cell membrane decreases: Incorrect. The permeability of the cell membrane to water remains relatively constant.

c. The permeability of the cell membrane increases: Incorrect. Osmosis is a passive process that doesn't require increased permeability.

d. The volume of the cell increases: Incorrect. A hypertonic solution will cause the cell to lose water and shrink.

Correct Answer is A

Explanation

a. Subclavian vein: The lymphatic system drains lymph into the cardiovascular system at the subclavian veins, specifically where the lymphatic ducts (thoracic duct and right lymphatic duct) empty.

b. Carotid artery: This is an artery supplying blood to the brain, not involved in returning lymph.

c. Ascending aorta: This is the part of the aorta that rises from the heart and distributes oxygenated blood, not involved in lymph return.

d. Jugular vein: While close to the lymphatic ducts, lymph specifically drains into the subclavian veins.

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