Enzymes are important in:
a. mechanical digestion
b. deglutition
c. chemical digestion
d. both A and C above
c. chemical digestion
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Secretin is a hormone that is secreted by the
A. stomach. B. small intestine. C. large intestine. D. liver. E. pancreas.
The temperature control center within the anterior region of the hypothalamus is activated by ______ and initiates reflexes that mediate ______
a. cold; heat production and heat conservation b. cold; heat loss c. warmth; heat loss d. warmth; heat production and heat conservation e. warmth; vasoconstriction
A 55-year-old woman develops a hiatal hernia in which the fundus of the stomach protrudes through the esophageal hiatus of the diaphragm into the thorax. Which of the following structures is/are at greatest risk of injury during surgical repair of this hernia?
(A) Thoracicduct (B) Azygosvein (C) Vagus nerves (D) Sympathetic chains (E) Superior epigastric vessels
What characteristic do simple diffusion and facilitated diffusion share?
A. Both require cellular energy for the transport of substances. B. Both move a substance from a region of higher concentration to one of lower concentration without using cellular energy. C. Both move water across a semipermeable membrane. D. Both require a special carrier molecule to move substances across the membrane.