Sleep __________ is a medical condition in which a person temporarily stops breathing while he or she is asleep.
A. hypopnea
B. tachypnea
C. hyperpnea
D. apnea
Ans: D. apnea
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Ventilation is increased the most by
a. increases in arterial b. decreases in arterial c. increases in arterial d. decreases in arterial e. none of the above
Which best describes the extracellular matrix?
A. It covers the body's surface, it contains connective and muscle tissue, and it helps generate movement. B. It surrounds cells; it contains proteins, polysaccharides, and minerals; it provides a scaffold for cell attachment; and it transmits chemical messengers to cells. C. It is a tissue having more than the four general cell types, it transports proteins and polysaccharides between body compartments, and it is the route by which chemical signals like hormones reach all parts of the body. D. It is found just inside the cell membrane in all tissues, it sends branching collagen fibers between cells to connect them, and it transmits chemical information from the interior of one cell to the interior of adjacent cells.
Severe anemia may trigger an adaptive conversion of
A. red marrow to yellow marrow. B. yellow marrow to red marrow. C. bone marrow to spongy bone. D. spongy bone to compact bone.
Which of these is a hormone that lowers blood volume and blood pressure?
A) angiotensin-II (A-II) B) renin C) atrial natriuretic peptide (ANP) D) aldosterone