Question 1

Irving, who is 78 years old, takes human growth hormone supplements to regain the strength of his youth. He may be disappointed because the hormone has been shown only to

Accepted Answer

A)  increase the red blood cell supply.
B)  decrease fat and increase muscle mass, but not improve strength.
C)  make him urinate more often.
D)  increase his risk of cancer.

Question 2

Your friend puts on a mask and chases you as a prank. Your body responds by releasing epinephrine and norepinephrine, along with other physiological responses. Your friend frightening you is the ________, that cause the body's response.

Accepted Answer

The answer of Your friend puts on a mask and...

Question 3

One of the hallmarks of Graves disease is

Accepted Answer

A)  weight gain.
B)  increased thirst.
C)  decreased appetite.
D)  goiter.

Question 4

Simple goiter is most prevalent where the soil lacks

Accepted Answer

A)  organic matter.
B)  vitamins.
C)  iodine.
D)  potassium.

Question 5

A hormone has a half-life of 20 minutes. After an hour, ________ percent of the original number of molecules remains.

Accepted Answer

A)  0
B)  12.5
C)  25
D)  50

Question 6

With age,

Accepted Answer

A)  levels of GH increase but of ADH decrease.
B)  levels of GH decrease but of ADH increase.
C)  levels of GH and ADH both decrease.
D)  levels of GH and ADH both increase.

Question 7

The opposing roles of the thyroid and parathyroid maintain the balance of calcium and phosphate ions in the blood. What will happen if the parathyroid gland develops a defect that prevents PTH secretion?

Accepted Answer

A)  The amount of calcium ions and phosphate ions in the blood will increase.
B)  The amount of calcium ions in the blood will increase and the amount of phosphate ions will decrease.
C)  The amount of calcium ions in the blood will decrease and the amount of phosphate ions will increase.
D)  The amount of calcium ions and phosphate ions in the blood will decrease.

Question 8

Paracrine substances called ________ have powerful, regulating effects on cellular responses to hormones.

Accepted Answer

The answer of Paracrine substances called ________ have powerful, regulating effects...

Question 9

Upregulation of a target cell can occur in response to

Accepted Answer

A)  prolonged decrease in the level of a hormone.
B)  prolonged increase in the level of a hormone.
C)  signals from antagonistic hormone products.
D)  signals from the posterior pituitary.

Question 10

Infantile hypothyroidism results from

Accepted Answer

A)  a deficiency of thyroid hormones at birth.
B)  hyperthyroidism in an adult.
C)  hypothyroidism in an adult.
D)  lack of prolactin.

Question 11

The hormone that the pineal gland secretes is

Accepted Answer

A)  melanoma.
B)  melatonin.
C)  myostatin.
D)  beta endorphin.

Question 12

Hyposecretion of hormones from the adrenal cortex leads to

Accepted Answer

A)  Cushing syndrome.
B)  Addison disease.
C)  buffalo hump.
D)  moon face.

Question 13

Down-regulation of a target cell can occur in response to

Accepted Answer

A)  prolonged decrease in the level of a hormone.
B)  prolonged increase in the level of a hormone.
C)  signals from antagonistic hormone products.
D)  signals from the posterior pituitary.

Question 14

A tropic hormone prevents endocrine glands from releasing their hormones, thereby maintaining homeostasis.

Accepted Answer

A) True 
 B)False

Question 15

The ________ secretes triiodothyronine.

Accepted Answer

A)  adrenal gland
B)  pancreas
C)  parathyroid gland
D)  thyroid gland

Question 16

The nervous system releases neurotransmitters into synapses. In contrast, the endocrine system releases ________ into the bloodstream.

Accepted Answer

The answer of The nervous system releases neurotransmitters into synapses....

Question 17

A fetus develops a malformation in the pituitary gland which causes it to lack melanocyte-stimulating hormone. This results in lack of skin and eye coloration, similar to albinism. The malformed portion of the pituitary gland is a structure called the ________.

Accepted Answer

pars inter...

Question 18

Type 2 diabetes mellitus results from

Accepted Answer

A)  a deficiency of insulin.
B)  insensitivity of cells to insulin.
C)  a deficiency of insulin and insensitivity of cells to insulin.
D)  an infection.

Question 19

Diabetes insipidus is caused by

Accepted Answer

A)  insulin deficiency.
B)  excess insulin.
C)  ADH deficiency.
D)  excess ADH.

Question 20

The blood concentration of growth hormone

Accepted Answer

A)  rises in females after menopause.
B)  varies greatly in males during adulthood.
C)  drops at puberty and rises after adolescence.
D)  rises at puberty and levels off after adolescence.

Exam 13: Endocrine System

Irving, who is 78 years old, takes human growth hormone supplements to regain the strength of his youth. He may be disappointed because the hormone has been shown only to

Correct AnswerverifiedShow Answer

Down-regulation of a target cell can occur in response to

Correct AnswerverifiedShow Answer

The blood concentration of growth hormone

Correct AnswerverifiedShow Answer

With age,

Correct AnswerverifiedShow Answer

Paracrine substances called ________ have powerful, regulating effects on cellular responses to hormones.

Correct AnswerverifiedShow Answer

Type 2 diabetes mellitus results from

Correct AnswerverifiedShow Answer

Your friend puts on a mask and chases you as a prank. Your body responds by releasing epinephrine and norepinephrine, along with other physiological responses. Your friend frightening you is the ________, that cause the body's response.

Correct AnswerverifiedShow Answer

The opposing roles of the thyroid and parathyroid maintain the balance of calcium and phosphate ions in the blood. What will happen if the parathyroid gland develops a defect that prevents PTH secretion?

Correct AnswerverifiedShow Answer

One of the hallmarks of Graves disease is

Correct AnswerverifiedShow Answer

Diabetes insipidus is caused by

Correct AnswerverifiedShow Answer

Upregulation of a target cell can occur in response to

Correct AnswerverifiedShow Answer

The hormone that the pineal gland secretes is

Correct AnswerverifiedShow Answer

A tropic hormone prevents endocrine glands from releasing their hormones, thereby maintaining homeostasis.

Correct AnswerverifiedShow Answer

Infantile hypothyroidism results from

Correct AnswerverifiedShow Answer

Simple goiter is most prevalent where the soil lacks

Correct AnswerverifiedShow Answer

The nervous system releases neurotransmitters into synapses. In contrast, the endocrine system releases ________ into the bloodstream.

Correct AnswerverifiedShow Answer

The ________ secretes triiodothyronine.

Correct AnswerverifiedShow Answer

A fetus develops a malformation in the pituitary gland which causes it to lack melanocyte-stimulating hormone. This results in lack of skin and eye coloration, similar to albinism. The malformed portion of the pituitary gland is a structure called the ________.

Correct Answerverifiedpars inter...View AnswerShow Answer

Hyposecretion of hormones from the adrenal cortex leads to

Correct AnswerverifiedShow Answer

A hormone has a half-life of 20 minutes. After an hour, ________ percent of the original number of molecules remains.

Correct AnswerverifiedShow Answer

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