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What ion is sometimes used as a second messenger of amino acid-based hormones?


A) sodium
B) calcium
C) iron
D) chlorine

E) A) and D)
F) A) and C)

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The endocrine gland that is probably malfunctioning if a person has a high metabolic rate is the parathyroid.

A) True
B) False

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Adrenocorticotropic hormone (ACTH) ________.


A) causes the release of hormones from the adrenal medulla
B) is secreted by the posterior pituitary
C) is not a tropic hormone
D) secretion is regulated by a hypothalamic regulatory hormone

E) B) and D)
F) A) and C)

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Eicosanoids do NOT include ________.


A) leukotrienes
B) prostaglandins
C) hydrocortisones
D) paracrines

E) B) and C)
F) A) and B)

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Which of the following is NOT a cardinal sign of diabetes mellitus?


A) polycythemia
B) polyuria
C) polydipsia
D) polyphagia

E) A) and D)
F) A) and B)

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Which anterior pituitary hormone does NOT target another endocrine gland?


A) adrenocorticotropic hormone (ACTH)
B) growth hormone
C) luteinizing hormone
D) follicle-stimulating hormone

E) B) and C)
F) C) and D)

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The parathyroid glands respond to which type of stimulus?


A) hormonal
B) humoral
C) neural
D) positive

E) A) and C)
F) All of the above

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The most important mineralocorticoid regulator of electrolyte concentrations in extracellular fluids is ________.


A) cortisol
B) insulin
C) glucagon
D) aldosterone

E) B) and C)
F) None of the above

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Antidiuretic hormone (ADH) ________.


A) promotes dehydration
B) increases urine production
C) secretion is inhibited by alcohol
D) is produced by the anterior pituitary

E) C) and D)
F) A) and D)

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Cellular responses to hormones that initiate second-messenger systems include ________.


A) possible activation of several different second-messenger systems
B) hormone binding to intracellular receptors
C) cyclic AMP phosphodiesterase formation of an active second messenger
D) formation of a specific protein kinase that acts on a series of extracellular intermediates

E) C) and D)
F) B) and C)

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The hypothalamic-hypophyseal tract ________.


A) runs through the infundibulum
B) conducts aldosterone to the hypophysis
C) connects the hypophysis to the pituitary gland
D) is the site of prolactin synthesis

E) A) and B)
F) B) and C)

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Oxytocin ________.


A) exerts its most important effects during menstruation
B) release is an example of a positive feedback control mechanism
C) is an anterior pituitary secretion
D) controls milk production

E) B) and D)
F) C) and D)

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Thyroid hormone (a small iodinated amine) enters target cells in a manner similar to ________.


A) steroid hormones,because both diffuse easily into target cells
B) glucagon,because the structure of glucagon is similar to that of thyroid hormone
C) insulin,because insulin is a small peptide
D) growth hormone,because the thyroid works synergistically with thyroid hormone

E) A) and B)
F) A) and C)

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What is the role of hormone producing cells found within the heart?

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In response to high blood pressure,a few...

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Iodine is an essential element required for the synthesis of thyroxine.

A) True
B) False

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