Practice Test JUNE 2008: Test 2 Flashcards Preview

RUSVM Physiology II > Practice Test JUNE 2008: Test 2 > Flashcards

Flashcards in Practice Test JUNE 2008: Test 2 Deck (27):
1

What is meant by "the single effect" of the Loop of Henle?

The separation of solute and water

2

Why is Lasix/furosimide a K+ wasting diuretic while diuretics that target the DCT are not K+ wasting?

Because a significant percentage of K+ is absorbed at the aLOH

3

What are the THREE MOST ABUNDANT solutes in the renal medullary interstitium

Na+, Cl-, and urea

4

Which of the following would result in the GREATEST INCREASE in secretion of ADH?

an increase in plasma osmolality and a decrease in systemic blood pressure

5

Aldosterone effects include each of the following EXCEPT:
a. Increased reabsorption of Na+ in the MCD
b. Increased reabsorption of Na+ in the DCT
c. Increased secretion of K+ in the DCT
d. Increased reabsorption of water in the DCT
e. Vasoconstriction at afferent arteriole

E. Vasoconstriction afferent arteriole

6

What would happen to a RBC if placed in the lumen of the bladder filled with urine?

It would shrink, stay the same, or swell depending on the urine.

7

What is true about the vasa recta?

Solutes are not actively transported between the interstitum and plasma by the vasa recta

8

Renal effects of Epinephrine include:

Constriction of AA
Constriction of EA
Increased secretion of renin
Increased Na+K+ATPase activity at the PCT

9

Why would a clinician give a COX-2 inhibitor to an animal with kidney disease?

To maintain renal perfusion in an animal suffering from arthritis

10

Which of the following BEST APPROXIMATES the range of plasma pH values found in a living domestic animal?

6.90 - 7.90

11

Which exists in lowest concentration in whole blood?

H2CO3

12

Given: a simple acid-base disorder is present, PC02 = 26 mm Hg and plasma [HC03-] = 8 mEqL. What simple acid-base disorder is present?

Metabolic acidosis

13

Which of the following is an acidosis that does not necessarily result in an increased anion gap?

Diarrhea.

Ketosis, lactic acidosis, and acidosis following ethylene glycol ingestion would all result in an anion gap

14

What are the two most abundant intracellular buffers?

K+ and phosphate

15

Which of the following is a buffer that is PRESENT in renal filtrate and ABSENT in plasma?

Ammonia

16

T or F: The fractional excretion of K+ in the hyperkalemic animal is greater than fractional excretion of K+ in the hypokalemic animal

T

17

T or F: Cations, but not anions, are reabsorbed at the DCT and CCD.

F

18

T or F: Filtrate [urea] is greatest at the end of the MCD

T

19

T or F: All diuretics act by inactivating or inhibiting ports through which filtered solutes are reabsorbed.

F

20

T or F: Parasympathetic innervation of the kidney promotes increased GFR and decreased reabsorption

T

21

T or F: Low plasma [urea] subsequent to liver disease can result in medullary washout and low USG.

T

22

T or F: Angiotensin I1 stimulates the hypothalamic thirst center, promotes systemic - vasoconstriction, and promotes secretion of ADH.

T

23

T or F: Hyponatremia is one of the two most potent stimuli to increase the secretion of
aldosterone.

F

24

T or F: If plasma pH is 7.1 and PCO2 is 20 mm Hg, then plasma [HCO3-) is 2 mEq/L

F

25

T or F: Plasma pH increases as cardiac output decreases

F

26

T or F: Metabolic acidosis and metabolic alkalosis can exist at the same time in the same animal

T

27

T or F: In the course of a day, the lungs excrete more acid than the kidneys do

T