The endocrine system:

  1. Releases chemicals into the bloodstream for distribution throughout the body

  2. Releases hormones that can alter the metabolic activities of many different tissues and organs

  3. Produces effects that can last for hours days or even longer

  4. Can alter the gene activity of cells

  5. All of the above

Answer:

e

Each of the following is an amino acid derivative EXCEPT:

  1. Epinephrine

  2. Melatonin

  3. Thyroxine

  4. TSH

Answer:

d

When adenyl cyclase is activated:

  1. cAMP is formed

  2. cAMP is degraded

  3. G proteins are replicated in a semiconservative fashion

  4. Steroid hormones enter the cell via receptor-mediated endocytosis

  5. None of the above

Answer:

a

Which of the following hormones does not act via a second messenger system?

  1. Glucagon

  2. Epinephrine

  3. GH

  4. Testosterone

  5. ACTH

Answer:

d

What hypophyseal structure receives signals from the hypothalamus via the hypophyseal portal system?

  1. Follicular medulla

  2. Adenohypophysis

  3. Neurohypophysis

  4. Pars intermedia

  5. Suprachiasmatic nucleus

Answer:

b

Low blood glucose typically results in the secretion of all of the following EXCEPT:

  1. Glucagon

  2. Thyroxine

  3. hGH

  4. PTH

  5. 3 of the above

Answer:

d

Which of the following is a function of glucocorticoids?

  1. Increased inflammatory response

  2. Increased blood [glucose]

  3. Decreased lipolysis

  4. Increased creatinine hydrolysis by osteocytes

  5. Increased osteoclast activity

Answer:

b

What hormone increases intestinal calcium absorption?

  1. Calcitriol

  2. Calcitonin

  3. Parathormone

  4. Pancreatic polypeptide

  5. GnRH

Answer:

a

Which of the following is a function of TSH?

  1. Activation of thyroid follicular cells

  2. Increase of iodine trapping in follicular cells

  3. Increased thyroglobulin synthesis

  4. Increase release of T4

  5. All of the above

Answer:

e

The ______ cells of the pancreas secrete insulin.

  1. Chief

  2. Principal

  3. Alpha

  4. Beta

  5. Delta

Answer:

d