Deck 33: Endocrine System

Question 1

Chemical substances, secreted by cells into the extracellular fluids, regulate the metabolic function of other cells in the body are called ________.

A) enzymes
B) hormones
C) antibodies
D) proteins

Answer 1

B

Question 2

All of the following hormones are produced by the thyroid gland EXCEPT ________.

A) calcitonin
B) OT
C) T₃
D) T₄

Answer 2

B

Question 3

Which endocrine gland also performs exocrine functions?

A) pituitary gland
B) thymus
C) thyroid gland
D) pancreas

Answer 3

D

Question 4

The posterior lobe of the pituitary gland is NOT a true endocrine gland because ________.

A) in adults it is not functional
B) it does not produce hormones, rather it stores hormones from the hypothalamus for release
C) it is strictly part of the neural system and has nothing to do with hormonal release
D) it is unable to function as endocrine tissue because it is part of the nervous system due to its location

Question 5

The darkly stained cells in the posterior lobe of the pituitary gland are called ________.

A) chromophobes
B) acidophils
C) chromophils
D) pituicytes

Question 6

Which two systems regulate homeostasis?

A) immune and endocrine
B) lymphatic and endocrine
C) muscular and endocrine
D) nervous and endocrine

Question 7

Which of the following hormones is secreted by the pars intermedia?

A) ADH
B) MSH
C) OT
D) none of the above

Question 8

Which cells of the parathyroid glands turns colorless when prepared with histological stains?

A) C cells
B) oxyphil cells
C) follicular cells
D) chief cells

Question 9

All of the following are regions of the adrenal cortex EXCEPT ________.

A) zona medulla
B) zona fasciculata
C) zona glomerulosa
D) zona reticularis

Question 10

CT is produced by which cells of the thyroid gland?

A) C cells
B) chromophils
C) pituicytes
D) follicle cells

Question 11

All of the following are parts of the anterior pituitary gland EXCEPT ________.

A) pars nervosa
B) pars distalis
C) pars intermedia
D) pars tuberalis

Question 12

An important regulator of electrolyte concentrations in extracellular fluids is ________.

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

Question 13

The parathyroid glands maintain adequate levels of blood calcium. This is accomplished by ________.

A) antagonizing the synthesis of calcitonin
B) blocking the action of growth hormone
C) activating osteoclasts so that calcium will be released
D) none of the above

Question 14

Which region of the adrenal gland is regulated by the sympathetic nervous system?

A) adrenal medulla
B) zona fasciculata
C) zona reticularis
D) zona glomerulosa

Question 15

What connects the pituitary gland to the hypothalamus?

A) brain stem
B) midbrain
C) infundibulum
D) thalamus

Question 16

In a negative feedback mechanism the response is ________ the stimulus.

A) to reduce
B) no change to
C) to enhance
D) none of the above

Question 17

All of the following are effects of calcitonin EXCEPT ________.

A) increases blood calcium levels
B) stimulates osteoblasts to store calcium
C) inhibits osteoclasts
D) decreases blood calcium levels

Question 18

Which region of the adrenal gland produces and secretes cortisol?

A) zona reticularis
B) adrenal medulla
C) zona glomerulosa
D) zona fasciculata

Question 19

Which region of the adrenal cortex secretes aldosterone?

A) zona fasciculata
B) zona glomerulosa
C) zona reticularis
D) none of the above

Question 20

What hormone produced by the thymus gland is essential for the maturation of the immune system?

A) calcitonin
B) triiodothyronine
C) tymosin
D) parathyroid hormone

Question 21

What type of ovarian follicle forms a fluid-filled bag containing an oocyte for release at ovulation?

A) primordial follicle
B) secondary follicle
C) primary follicle
D) Graafian follicle

Question 22

Which hormone raises blood sugar concentration?

A) glucagon
B) insulin
C) parathryoid hormone
D) calcitonin

Question 23

Which part of the testes produce spermatozoa?

A) interstitial cells
B) seminiferous tubules
C) primordial cells
D) follicular cells

Question 24

All of the following are cells of the islets of Langerhans EXCEPT ________.

A) G cells
B) cells
C) delta cells
D) alpha cells