Renal Regulation of Ions

Question 1

the normal intracellular concentration of potassium ion is:

a) 140 mEq/L
b) 145 mM/L
c) 141 M/cm^cubed
d) 138 m/cm

Answer 1

a) 140

Question 2

What will increase aldosterone secretion?

Answer 2

increase in potassium

Question 3

reabsorption of of potassium occurs in the

Answer 3

proximal tubule and ascending limb of Henle

Question 4

when extracellular K goes up ____ goes up

Answer 4

aldosterone

Question 5

principles cells ___ potassium

Answer 5

secrete

Question 6

what causes principle cells to ___ potassium?

Answer 6

secrete, stimulated by tubule concentration and aldosterone

Question 7

Describe the ratio of effects potassium has on aldosterone

Answer 7

SMALL changes in potassium concentration cause LARGE changes in aldosterone secretion by adrenals

Question 8

increased sodium intake does what

Answer 8

decreases aldosterone secretion, and therefor potassium excretion

Question 9

increased sodium intake increases ____, and thus decreases proximal tubular reabsorption of ____

Answer 9

GFR, sodium

Question 10

Increased levels of ____, _____, and a certain “condition” all decrease calcium excretion

Answer 10

PTH, plasma concentration of phosphate, and metabolic acidosis

Question 11

insulin and aldosterone both

Answer 11

stimulate potassium uptake by cells

Question 12

____ is a condition that results from excess secretion of aldosterone

Answer 12

hypokalemia

Question 13

Conn’s syndrome

Answer 13

hypokalemia

Question 14

____ is a condition that results from deficiency of aldosterone secretion

Answer 14

hyperkalemia

Question 15

Addison’s disease

Answer 15

hyperkalemia

Question 16

How much of filtered calcium is reabsorbed by the body

Answer 16

almost all of it