Which of the following animals has the highest mass specific oxygen consumption?
A) elephant
B) sheep
C) mouse
D) man
C
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When Tanous exercises, his muscles need a greater flow of blood. Which of the following substances are the muscles likely to secrete locally?
A) nitric oxide B) histamine C) prostaglandins D) growth hormone
Body defenses that respond to generalized tissue damage and many common pathogens are referred to as
A) phagocytic. B) antipathogenic responses. C) nonspecific mechanisms. D) lymphomas. E) specific mechanisms.
Which of the following does not take place during the first of the two phases of photosynthesis?
a. Light energy is absorbed by electrons in the chlorophyll. b. Water is split. c. ATP and electron carriers are formed. d. Carbon dioxide is fixed. e. Oxygen is released.
The chance of a child having albinism when both of his parents are heterozygous for the disorder is ____ percent
a. 0 b. 25 c. 33 d. 50 e. 75