Question

1. Which, if any, of the following statements is true about theregulation of calcium levels in the blood?

a.) If calcium levels experience a significant drop, PTH levelscan be expected to rise

b.) If calcium levels experience a significant drop, PTH levelscan be expected to drop

c.) If phosphate levels experience even a slight drop, PTHlevels increse dramatically

d.) B and C

2.) An increse in the level of parathyroid hormone would beexpected to have which, if any, of the following effects?

a.) Increased activity of osteoblasts

b.) A decrease in excretion of phosphate by the kidneys

c.) A decrease in the activity of osteoclasts

d.) A and B

3.) Which of the following plays the biggest direct role inincreasing the intestinal absorption of Calcium?

a.) Calcitonin

b.) Calciferol

c.) Calcitriol

d.) Calsequestrin

4.) Our bodies attempt to tightly regulate blood calcium levels.This is an example of:

a.) Homeostasis

b.) Diastasis

c.) Hysteresis

d.) Automonic tone

5.) The _________ secretes a mix of norepinephrine, epinephrine,and dopamine when stimulated by the sympathetic nervous system

a.) Adrenal medulla

b.) Adrenal cortex

c.) Ovarian cortex

d.) Hypothalamus

e.) Pineal gland

6.) Stimulation of beta receptors results in:

a.) Dilation of bronchiole walls via constriction of smoothmuscle cells

b.) Dilation of bronchiole walls via relaxation of smooth musclecells

c.) Faster, stronger heartbeat

d.) A and C

e.) B and C

7.) The diameter of many Stimulation of beta receptors resultsin:

a.) A stronger, faster heartbeat

b.) A weaker, slower heartbeat

c.) No chance in the rate of strength of the heartbate

d.) None of the above