Which nervous system usually maintains a heart rate of 72 beats per minute?
A) somatic nervous system
B) sympathetic nervous system
C) parasympathetic nervous system
D) central nervous system
Answer: C
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Compared to arteries, veins
A) are rounder in a sectional cut. B) have more smooth muscle in their tunica media. C) have a pleated endothelium. D) have thinner walls. E) hold their shape better when cut.
Which of the following shows the correct sequence of mitosis?
A. Prophase - metaphase - anaphase - telophase B. Metaphase - prophase - anaphase - telophase C. Telophase - metaphase - prophase - anaphase D. Metaphase - telophase - anaphase - prophase E. Prophase - anaphase - metaphase - telophase
Erythrocytes function in the transport of CO2 by
a. containing carbonic anhydrase, which catalyzes the interconversion of CO2 and bicarbonate. b. containing hemoglobin, which binds CO2 to the iron portion. c. containing hemoglobin, which binds CO2 to the protein portion. d. both containing carbonic anhydrase and binding CO2 to the iron portion. e. both containing carbonic anhydrase and binding CO2 to the protein portion.
On average, what percentage of the adult female's body is made of water?
A) 15% B) 30% C) 50% D) 65% E) 80%