BIO 220 Topic 10 Graded Quiz Latest



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BIO 220 Topic 10 Graded Quiz Latest

BIO 220 Topic 10 Graded Quiz Latest


BIO 220 Topic 10 Graded Quiz Latest

Question 1

Adequate calcium absorption from the GI tract depends on

a. serum K levels.

b. serum calcitonin levels.

c. adequate amounts of vitamin D.

d. the osmolality of the extracellular fluid.

e. adequate amounts of vitamin C.

Question 2

As the rate of sweat production increases, the amount of sodium lost in the urine

a. increases.

b. decreases.

c. remains the same.

Question 3

Which of the following can play a role in buffering the pH of urine?

a. ammonia

b. bicarbonate ions

c. phosphate ions

d. ammonia and bicarbonate ions

e. ammonia, bicarbonate ions and phosphate ions

Question 4

Parathyroid hormone effects the

a. bones, heart, and blood.

b. kidney, liver, and spleen.

c. intestine, kidneys, and bone.

d. liver, stomach, and small intestine.

e. stomach, pancreas, and bone.

Question 5


a. promotes the absorption of calcium from the gastrointestinal tract.

b. promotes osteoclast activity in the bones.

c. reduces calcium excretion by the kidneys.

d. reduces extracellular calcium ion levels.

e. increases blood calcium levels.

Question 6

Receptors sensitive to changes in the osmolality of extracellular fluid are the

a. baroreceptors.

b. chemoreceptors.

c. osmoreceptors.

d. pressoreceptors.

e. proprioreceptors.

Question 7

Calcium balance is influenced by

a. ADH and parathyroid hormone levels.

b. ADH and aldosterone levels.

c. parathyroid hormone and vitamin D levels.

d. aldosterone and parathyroid hormone levels.

e. insulin and glucagon.

Question 8

Serum electrolyte concentrations are most often expressed as

a. mg %.

b. mmHg.

c. mg/dl.

d. mEq/L.

e. None of these choices is.

Question 9

The diagram illustrates the effect of BP on sodium and water reabsorption in the kidneys. What does “A” represent?

a. decreased BP

b. increased renin secretion

c. angiotensinogen

d. angiotensin II

e. increased sodium and water reabsorption results in increased BP

Question 10

Elevated blood pressure under resting conditions results in increased urinary output because

a. baroreceptors signal the hypothalamus to increase ADH secretion.

b. elevated blood pressure stimulates renin secretion.

c. the amount of angiotensin II formed is increased.

d. aldosterone levels increase.

e. baroreceptors signal the hypothalamus to decrease ADH secretion.

Question 11

An increase in blood CO2 levels is followed by a(n) ____ in H+ ions and a(n) ____ in blood pH.

a. decrease, decrease

b. decrease, increase

c. increase, increase

d. increase, decrease

e. increase, no change

Question 12

Which of the following is ly matched?

a. alkalosis – hypokalemia

b. cell destruction – hypokalemia

c. increased secretion of aldosterone – hyperkalemia

d. overuse of diuretics – hyperkalemia

e. acidosis – hypokalemia

Question 13

If the hydrogen ion concentration in the blood increases, bicarbonate ions act as buffers by

a. removing excess hydrogen ions from the plasma.

b. releasing hydrogen ions into the plasma.

c. dissociating into H+ and CO3-.

d. combining with chloride ions.

e. combining with hemoglobin.

Question 14

Which of the following statements concerning potassium ions is false?

a. An increase in the extracellular potassium ion concentration leads to depolarization.

b. Potassium ions are secreted into the nephron by the distal convoluted tubule.

c. When aldosterone levels are high, potassium secretion is low.

d. Aldosterone secretion is stimulated by high blood levels of potassium ions.

e. None of these choices is false.

Question 15

Which of the following would be expected to cause hyponatremia?

a. high intake of sodium

b. increased aldosterone production

c. increased urine output

d. decreased aldosterone production

e. decreased ADH production

Question 16

The predominant intracellular cation is

a. potassium.

b. sodium.

c. calcium.

d. magnesium.

e. chloride.

Question 17

Which of the following individuals would have the largest percentage of their bodyweight as water?

a. a 7-month-old female

b. a lean 35-year-old male athlete

c. a chunky 52-year-old male athlete

d. a healthy 88-year-old male

e. an adult female marathon runner

Question 18

The main regulator of serum phosphate levels is a transport process in the

a. liver.

b. kidneys.

c. pancreas.

d. small intestine.

e. large intestine.

Question 19

Which of the following fluid compartments contains the largest volume of water?

a. plasma

b. interstitial compartment

c. intracellular compartment

d. extracellular compartment

e. lymph

Question 20

Respiratory alkalosis can occur as a result of

a. asphyxia.

b. asthma.

c. severe emphysema.

d. hyperventilation.

e. hypoventilation.