Glucagon secretion is stimulated by:
A. hypoglycemia and parasympathetic nerve firing.
B. hyperglycemia and a high concentration of epinephrine.
C. high plasma epinephrine and high plasma incretin concentrations.
D. hypoglycemia and high plasma epinephrine concentration.
E. hyperglycemia and high plasma incretin concentration.
D
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A myelin sheath is composed primarily of __________.
A. lipids B. carbohydrates C. glycoproteins D. proteins E. polysaccharides
The major factor that promotes increased secretion of CRH is
a. low Na+ concentration in the extracellular fluid b. stress c. angiotensin II d. increased blood amino acid concentration e. increased blood glucose concentration
Which hormone disorder is associated with weight gain, sensitivity to cold, dry skin and hair, constipation, low metabolic rate, and sluggishness?
A. Acromegaly B. Addison disease C. Androgen-insensitivity syndrome D. Hyperthyroidism E. Hypothyroidism
Which of the following events occurs in the secondary active transport of glucose?
A. Na+ ions and glucose are cotransported by the same carrier molecule. B. The Na+-K+ pump maintains a Na+ concentration gradient inside the cell. C. Energy comes from diffusion of Na+ down their concentration gradient. D. Glucose is moved against its concentration gradient into the cell. E. All of these choices are correct.