Which of the following statements concerning vitamin D is incorrect?
a. It can be synthesized by the skin on exposure to sunlight.
b. It must be modified by alterations in the liver and kidneys before it is biologically active.
c. It enhances the effect of calcitonin on bone.
d. It increases Ca2+ absorption in the intestine.
e. Its deficiency in children results in rickets.
C
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Which condition would result in the lowest alveolar ventilation rate?
a. quiet breathing b. a normal respiratory rate and normal tidal volume c. a low respiratory rate and high tidal volume d. a high respiratory rate and very low tidal volume e. a low respiratory rate and very low tidal volume
Which of the following is true about nonspecific resistance and specific immunity?
A. Specific immunity requires a prior exposure to a pathogen so the system can recognize the pathogen B. Nonspecific defenses are widespread, meaning they work to fight many pathogens without prior exposure. C. Nonspecific defenses work to fend off any pathogen in the same way every time the pathogen comes along in the body. D. All of these statements are true.
How can a lever system work at a disadvantage but still be of use to us?
What will be an ideal response?
Identify the process characterized by an exaggerated response of beta cells to a rise in blood glucose, usually seen in those predisposed to Type II diabetes?
A. Reactive hypoglycemia B. Stress hyperglycemia C. Exercise hypoglycemia D. Hyperglycemia