Most buffer systems in the body consist of
a) A weak acid
b) A weak base
c) A weak acid and the salt of that acid
d) A weak base and the salt of that base
e) None of these are correct
c
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One primary spermatocyte containing ____ chromosomes yields ____ spermatozoa containing ____ chromosomes, whereas one primary oocyte containing ____ chromosomes yields ____ ova (ovum) containing ____ chromosomes
a. 46, 2, 23, 46, 2, 23 b. 46, 4, 23, 46, 1, 23 c. 46, 4, 23, 46, 4, 23 d. 23, 1, 23, 23, 1, 23 e. none of these answers.
Define oxygen debt (excess postexercise oxygen consumption)
A) Oxygen debt is the decrease in oxygen during active aerobic respiration. B) Oxygen debt is the accumulation of oxygen in tissues during anaerobic respiration. C) Oxygen debt is the sum total of oxygen molecules used during cellular metabolism. D) Oxygen debt is the amount of oxygen intake required to produce the ATP needed to restore the body after strenuous activity. E) Oxygen debt is the amount of oxygen that must be returned to the lungs following strenuous exercise.
If the cells of the SA node failed to function, how would the heart rate be affected?
A) The heart would beat faster because the AV node would be the pacemaker. B) The heart would beat slower because the AV node would be the pacemaker. C) The heart would stop beating because the SA node was not acting as the pacemaker. D) The heart would go into an arrhythmia because the Purkinje fibers would try to be the pacemaker. E) The heart would beat faster because the inherent rate of myocardial depolarization is faster than the SA node pacemaker.
An alternative term for the forehead is
A) cornu. B) calvaria. C) braincase. D) temporal squama. E) frons.