Reabsorption and Secretion

Question 1

Diabetes insipidus is an

Answer 1

ADH deficiency

Question 2

pGC

Answer 2

glomerular capillary pressure

Question 3

Ppc

Answer 3

peritubular capillary pressure

Question 4

peritubular capillaries are responsible for

Answer 4

reabsorption

Question 5

what allows large molecules to cross the membrane

Answer 5

carrier proteins

Question 6

up to 10mmol/l of glucose will be filtered and reabsorbed in, beyond this level and the glucose will

Answer 6

appear in the urine

Question 7

glucose in the urine (over 10mmol/l) means that it is over the

Answer 7

renal plasma threshold for glucose

Question 8

what is the most abundant in ECF?

Answer 8

Na+

Question 9

Na is reabsorbed by

Answer 9

active transport

Question 10

the active transport of Na+ out of the proximal tubular membrane down the electrical gradient - creates an ……… ………….

(which draws …… out of the tubules)

Answer 10

osmotic force

H20

Question 11

Na+ is responsible for the transport of loads of stuff in and out the tubule! Therefore is Na is low then glucose transport will be

Answer 11

inhibited

Question 12

simple terms:

filtration

Answer 12

blood to lumen

glomerulus to proximal tubule–>loop of henle–>collecting duct

Question 13

simple terms:

reabsorption

Answer 13

lumen to blood

(proximal tubule –> peritubular capillaries, then again at distal tubule to peritubular capillaries, etc until it all goes into the renal vein)

Question 14

simple terms:

secretion

Answer 14

blood to lumen

peritubular capillaries secrete into proximal and distal tubules

Question 15

simple terms:

excretion

Answer 15

lumen to external environment

collecting duct to bladder

Question 16

hyperhalaemia leads to a reduced RMP which leads to

Answer 16

AF and cell death

Question 17

hypokalaemia leads to an increased RMP which hyperpolarizes muscle, cardiac cells causing

Answer 17

arrhythmias and death

Question 18

potassium is regulated by what?

Answer 18

aldosterone