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Calcitonin exerts its effect on which organ?


A) Bones
B) Kidneys
C) Intestines
D) Liver

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

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Which of the following statements about the pancreas is correct?


A) It is primarily an endocrine gland.
B) It secretes digestive enzymes into the small intestine.
C) Pancreatic islets consist of a single cell type.
D) It lies just in front of the stomach.

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

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The middle layer of the adrenal cortex is called the ____________________; it secretes ____________________.

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zona fasci...

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What would you expect to occur in response to increasing blood levels of calcium?


A) The parathyroid gland to secrete parathyroid hormone
B) The thyroid gland to release calcitonin
C) The thyroid gland to suppress release of calcitonin
D) The adrenal medulla to secrete catecholamines

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

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Which of the following statements about the endocrine system is true?


A) Endocrine glands are ductless glands that secrete their hormone into the bloodstream.
B) Endocrine glands respond quickly to stimuli.
C) The endocrine system exerts short-lived effects.
D) The endocrine system adapts quickly to continual stimulation.

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

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The innermost layer of the adrenal cortex is called the ____________________; it secretes ____________________.

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zona retic...

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The endocrine gland that influences more body processes than any other endocrine gland is the


A) thyroid gland.
B) pituitary gland.
C) adrenal gland.
D) pineal gland.

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

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Which gland is part of both the endocrine and immune systems?


A) Thyroid gland
B) Pineal gland
C) Thymus
D) Adrenal glands

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

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What is the mechanism whereby one endocrine gland stimulates another endocrine gland to secrete a hormone,which,in turn,causes the first endocrine gland to stop production of its hormone?


A) Negative feedback
B) Positive feedback
C) Second messenger system
D) Hormone-inhibiting mechanism

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

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The principal glucocorticoid is ____________________.

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During a time of stress,which layer of the adrenal cortex would you expect to be the most active?


A) Zona glomerulosa
B) Zona fasciculata
C) Zona reticularis
D) All three zones

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

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The more ____________________ a cell has,the more sensitive it will be to a hormone.

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Vasopressin is another name for ____________________.

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antidiuret...

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Hypersecretion of thyroid hormone may result in which disorder?


A) Cretinism
B) Goiter
C) Gigantism
D) Grave's disease

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

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How does thyroid hormone affect heat production?


A) It causes shivering,which increases warmth.
B) It stimulates metabolism,which increases warmth.
C) It promotes the secretion of catecholamines,which dilates blood vessels and,therefore,increases warmth.
D) It increases the heart rate,which promotes circulation to increase warmth.

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

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Which of the following is one of the effects of parathyroid hormone?


A) The movement of calcium from blood to bone
B) The excretion of calcium in the intestines
C) The reabsorption of calcium by the kidneys
D) Increase the rate of metabolism

E) B) and D)
F) All of the above

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Which of the following statements about the adrenal cortex correct?


A) It contains modified neurons called chromaffin cells.
B) It acts as part of the sympathetic nervous system.
C) It consists of three layers,each of which secretes a different corticosteroid.
D) It helps boost glucose levels by breaking down glycogen into glucose.

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

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The cells of the ovarian follicle secrete the hormone ____________________.

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