The pH of the blood is slightly basic. Which of the following describes this pH?
A. 4.7
B. 7.4
C. 12.6
D. 6.4
Answer: B
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Maternal and fetal blood freely mix in the placenta.
a. true b. false
Which of the following does not play a role in thermoregulation of the testes?
A. The pampiniform plexus of veins B. The dartos muscle C. The countercurrent heat exchanger D. The cremaster E. The bulbospongiosus muscle
Hypersecretion of growth hormone can cause gigantism if it begins in childhood, but is more likely to cause ___ if it begins in adulthood.
a. Cushing's syndrome b. acromegaly c. myxedema d. dwarfism e. Grave's disease
In a trained athlete, the maximal oxygen consumption is increased due to:
A. an increase in the number of mitochondria B. more efficient blood delivery to muscle C. a reduction in the minute ventilation D. a higher resting heart rate