March 20, 2015 --> Kidneys, pH (151-159, 176-181) Flashcards Preview

BOARD: Biochemistry (Dental Decks) > March 20, 2015 --> Kidneys, pH (151-159, 176-181) > Flashcards

Flashcards in March 20, 2015 --> Kidneys, pH (151-159, 176-181) Deck (11):
1

What do Inulin and PAH measure?

Inulin: Measures glomerular filtration rate
PAH: used to estimate renal plasma flow

2

Other than Inulin, what two other substances can also be used to determine GFR?

Blood urea nitrogen and Serum creatinine

3

T or F, Inulin undergoes tubular secretion and reabsorption so that it can more accurately measure GFR

False, Does not undergo tubular secretion or reabsorption

4

The rate at which a substance is cleared from plasma = ?

plasma volume completely cleared / unit time

5

T or F, PAH undergoes tubular secretion and reabsorption and is also used to measure GFR

False, it measures renal plasma flow

6

What are the two general classes of nephrons

Cortical nephrons
Juxtamedullary nephrons

7

What are the different roles of Cortical and Juxtamedullary nephrons

Cortical: Mainly perform excretory and regulatory functions
Juxtamedullary: Concentrate and dilute urine

8

Much of the ion transport taking place in the distal convoluted tubule is regulated by what?

The endocrine system (parathyroid hormone and aldosterone have different roles)

9

Explain how Parathyroid hormone and Aldosterone have differing roles in the regulation of ion transport in the distal convoluted tubule

Parathyroid hormone --> distal conv. tubule reabsorbs more calcium and excretes more phosphate

Aldosterone --> distal conv. tubule reabsorbs more sodium and excretes more potassium

10

T or F, the descending limb is permeable to water but completely impermeable to salt

True

11

What is the primary role of the loop of henle

to concentrate salt in the interstitium, the tissue surrounding the loop