How do the kidneys function as a part of the excretory system?
A. By removing bilirubin
B. By removing nitrogenous wastes
C. By removing salts, lactic acid, and urea
D. By removing carbon dioxide
Answer: B
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An enzyme secreted by the gastric mucosa of a newborn that coagulates milk proteins is
A) pepsin. B) trypsin. C) gastrin. D) rennin. E) cholecystokinin.
Some rat poisons contain a toxin that blocks the liver's ability to utilize vitamin K. Animals that consume this poison would die of
A) anemia. B) acidosis. C) hemorrhage. D) thrombocytopenia. E) starvation.
Which of the following is the condition of the skull at birth?
A) The mandible is incomplete. B) The frontal bone has just begun forming. C) The floor and roof of the cranium are incomplete. D) Only the roof of the skull remains incomplete. E) Only the chondrocranium exists.
Both chemical and mechanical digestion start in the mouth and continue in the stomach.
Answer the following statement true (T) or false (F)