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Flashcards in Kidneys Structure And Function Deck (16):
1

What does the urinary system consist of

Kidneys
Renal a and v
Ureter
Urinary bladder
Urethra

2

Where are the kidneys located

T12-L3

3

What makes up the kidney

Renal cortex
Renal medulla - in renal pyramids giving a striated appearance
Renal pelvis - where urine collects before ureter
Ureter

4

What is the nephron

Fictional unit of the kidney
About 1 million in a kidney

5

What are e functional mechanism the nephron does

Filtration. - glomerular
Re absorption - subs solute back into blood
Secretion - subs moved form blood to tubule of fluid then left over urine

6

What dos the renal artery give rise to

Afferent arteriole which then goes to a tuft of capillaries - glomerulus - efferent then branch to peritubular caps

7

What are the two types of nephron

Juxtamedullary 20%
Cortical 80%

8

What is the juxtmedullary nephorn

Longer loop of Henle which descend much further into medulla of kidney
Do not have peritubular capillaries have a single vasa recta
Responsible for more concentrated urine

9

What are some kidney functions

Water balance
Salt balance
Maintenance of plasma volume
Maintenance of plasma osmolarity
Acid base balance
Excretion of metabolic waste
Excretion of exogenous foreign compounds
Secretion of Renin
Secretion of EPO
Conversion vit d into active form

10

What so urine

Modified filtrate of blood

11

What do kidneys incorporate

Filtration system
Rich blood supply
Mechanisms for urine modification - reabs and sec

12

What are 3 basic renal processes

Glomerular filtration
Tubular reabs
Tubular sec

13

How is the rate of filtration of a substance worked out

Mass of sub filtered into bowmans capsule per unit time
Rate of filtration of sub = plasma conc of sub X GFR

14

How is the rate of excretion of a substance calculated

Mass of sub excreted per unit time

Rate of excretion of sub = concentration of the sub in the urine X Vu (urine flow rate)

15

How is the rate of reabsortption of a substance calculated

Rate of filtration > rate of excretion net reabs of sub occurred

Rate of reabs of sub = rate of silt ration of sub - rate of excretion of sub

16

How is the rate of secretion of a substance calculated

If rate of filtration