Which sex chromosome(s) is(are) needed for life?

A. X
B. Y
C. X and Y


Answer: A

Anatomy & Physiology

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Under normal circumstances, which passageway is capable of conducting air, food, or liquid?

A. Nasopharynx B. Laryngopharynx C. Glottis D. Larynx E. Trachea

Anatomy & Physiology

Which of the following is the dominant method of carbon dioxide transport?

a) Bound to hemoglobin b) Bound to oxygen c) Dissolved in plasma as a gas d) Dissolved in plasma as bicarbonate ions e) Diffusion

Anatomy & Physiology

Which of the following statements accurately describe events that occur as a result of a local potential reaching threshold?

A. Activation gates of Na+ ion channels begin to close. B. Inactivation gates of Na+ ion channels begin to open. C. A positive feedback cycle develops in which depolarization causes activation gates of Na+ ion channels to open. D. K+ ion channels begin to close. E. Inactivation gates of Na+ ion channels begin to open and a positive feedback cycle develops in which depolarization causes activation gates of Na+ ion channels to open.

Anatomy & Physiology

Aldosterone stimulates the reabsorption of Na+ and secretion of K+ by the ________.

A. distal convoluted tubules B. proximal convoluted tubules C. nephron loops D. proximal and distal convoluted tubules

Anatomy & Physiology