Question 1

What is the effect of thyroxine?

Accepted Answer

A)   Reduces the rate at which carbohydrates are utilized
B)   Increases the rate at which proteins are synthesized
C)   Inhibits activities of the nervous system
D)   Inhibits the rate at which calcium enters body fluids
E)   Lowers the basal metabolic rateF) B) and C)
G) All of the above

Question 2

What hormone decreases the plasma concentration of calcium?

Accepted Answer

A)   Thyroxine
B)   Triiodothyronine
C)   Calcitonin
D)   Parathyroid hormone
E)   Growth hormoneF) B) and D)
G) B) and C)

Question 3

A hormone binding to its membrane receptor may cause increased permeability to sodium ions.

Accepted Answer

A) True 
 B)False

Question 4

Removal of the anterior pituitary gland would affect the functioning of which gland(s)  or structure(s) ?

Accepted Answer

A)   Thyroid gland
B)   Pancreatic islet cells
C)   Adrenal medulla
D)   Kidneys
E)   Parathryoid glandsF) A) and B)
G) D) and E)

Question 5

Oxytocin acts on the myoepithelial cells of the breastsand causes the ejection of breast milk.

Accepted Answer

A) True 
 B)False

Question 6

During a thyroidectomy, a surgeon inadvertenly removes the parathyroid glands from the patient. What is a likely consequence of this error?

Accepted Answer

A)   Blood calcium levels will drop.
B)   Blood pressure will rise due to excess blood sodium levels.
C)   Bone mass will increase.
D)   The blood sugar levels will increase.E) A) and D)
F) C) and D)

Question 7

What symptoms would result from an excess release of hormones from the adrenal medulla?

Accepted Answer

A)   High blood pressure
B)   Decreased heart rate
C)   Decreased blood sugar
D)   Sodium loss in the urine
E)   Abnormal bone growthF) C) and E)
G) B) and D)

Question 8

When a gland is stimulated to increase its secretion by the substance it produces, a(n) __________ feedback system is operating.

Accepted Answer

The answer of When a gland is stimulated to increase...

Question 9

What disorder is caused by an oversecretion of growth hormone during childhood?

Accepted Answer

A)   Acromegaly
B)   Gigantism
C)   Exophthalmia
D)   HyperlipidemiaE) None of the above
F) A) and B)

Question 10

A group of lipids called __________ have powerful, regulating effects on a variety of tissues.

Accepted Answer

The answer of A group of lipids called __________ have...

Question 11

The sex hormones from the adrenal cortex are primarily androgens.

Accepted Answer

A) True 
 B)False

Question 12

Releasing hormones from the hypothalamus have target cells in the anterior pituitary gland.

Accepted Answer

A) True 
 B)False

Question 13

Thyroxine (T 4) and Triiodothyronine (T 3) have opposite effects on target cells.

Accepted Answer

A) True 
 B)False

Question 14

After a meal, glucose levels in the blood rise and, in response, the pancreas releases a hormone to lower blood glucose. This is an example of which control pathway?

Accepted Answer

A)   A hormone stimulates the release of another hormone.
B)   The nervous system stimulates a gland directly.
C)   Changing plasma levels of a substance stimulate a gland directly.D) None of the above
E) All of the above

Question 15

What primarily controls the secretion of parathyroid hormone?

Accepted Answer

A)   Hypothalamic hormones
B)   Blood calcium concentration
C)   Thyroid hormones
D)   Hormones from the anterior pituitary gland
E)   Hormones from the posterior pituitary glandF) A) and C)
G) C) and D)

Question 16

During which phase of the stress response is cortisol released?

Accepted Answer

A)   Alarm phase
B)   Resistance phaseC) A) and B)
D) undefined

Question 17

The __________ gland must have iodine before it can synthesize its hormones.

Accepted Answer

The answer of The __________ gland must have iodine before...

Question 18

During which phase of the stress response are amino acids used to make glucose?

Accepted Answer

A)   Alarm phase
B)   Resistance phaseC) A) and B)
D) undefined

Question 19

What is the action of thymosin hormones?

Accepted Answer

A)   They stimulate production of sex cells.
B)   They regulate sleep-wake cycles.
C)   They stimulate production of immune cells.
D)   They regulate production of T 3 and T 4.E) B) and C)
F) A) and B)

Question 20

What hormone sustains milk production after birth?

Accepted Answer

A)   ADH
B)   PTH
C)   PRL
D)   OT
E)   GHF) A) and E)
G) B) and E)

Exam 11: Endocrine System

Removal of the anterior pituitary gland would affect the functioning of which gland(s) or structure(s) ?

Correct AnswerverifiedShow Answer

Thyroxine (T 4) and Triiodothyronine (T 3) have opposite effects on target cells.

Correct AnswerverifiedShow Answer

The __________ gland must have iodine before it can synthesize its hormones.

Correct AnswerverifiedShow Answer

What primarily controls the secretion of parathyroid hormone?

Correct AnswerverifiedShow Answer

What hormone decreases the plasma concentration of calcium?

Correct AnswerverifiedShow Answer

What symptoms would result from an excess release of hormones from the adrenal medulla?

Correct AnswerverifiedShow Answer

What is the effect of thyroxine?

Correct AnswerverifiedShow Answer

Releasing hormones from the hypothalamus have target cells in the anterior pituitary gland.

Correct AnswerverifiedShow Answer

What disorder is caused by an oversecretion of growth hormone during childhood?

Correct AnswerverifiedShow Answer

The sex hormones from the adrenal cortex are primarily androgens.

Correct AnswerverifiedShow Answer

A group of lipids called __________ have powerful, regulating effects on a variety of tissues.

Correct AnswerverifiedShow Answer

A hormone binding to its membrane receptor may cause increased permeability to sodium ions.

Correct AnswerverifiedShow Answer

During a thyroidectomy, a surgeon inadvertenly removes the parathyroid glands from the patient. What is a likely consequence of this error?

Correct AnswerverifiedShow Answer

After a meal, glucose levels in the blood rise and, in response, the pancreas releases a hormone to lower blood glucose. This is an example of which control pathway?

Correct AnswerverifiedShow Answer

What hormone sustains milk production after birth?

Correct AnswerverifiedShow Answer

During which phase of the stress response is cortisol released?

Correct AnswerverifiedShow Answer

During which phase of the stress response are amino acids used to make glucose?

Correct AnswerverifiedShow Answer

When a gland is stimulated to increase its secretion by the substance it produces, a(n) __________ feedback system is operating.

Correct AnswerverifiedShow Answer

What is the action of thymosin hormones?

Correct AnswerverifiedShow Answer

Oxytocin acts on the myoepithelial cells of the breastsand causes the ejection of breast milk.

Correct AnswerverifiedShow Answer

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Thyroxine (T ₄) and Triiodothyronine (T ₃) have opposite effects on target cells.

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