ECF Volume Regulation 1 and 2 (NOT FINISHED)

Question 1

the distribution of total body water between cells and ECF is determined by what?

Answer 1

the number of osmotically active particles in each compartment

Question 2

What are the major ECF osmoles?

Answer 2

Na+

Cl-

Question 3

What are the major ICF osmoles?

Answer 3

K+

Question 4

What is hypovolaemia?

Answer 4

volume depletion

in this case of ECF

Question 5

ICF is what fraction of TBW?

Answer 5

2/3rds

Question 6

TBW

Answer 6

total body water

Question 7

ECF is what fraction of TBW?

Answer 7

1/3rd

Question 8

how many litres of fluid in ECF?

Answer 8

14

Question 9

how many litres of fluid in ICF?

Answer 9

28

Question 10

Changes in Na content of the ECF will change ECF ………. and therefore will effect the volume of blood perfusing the tissues and this will effect ……. ……….

Answer 10

volume

blood pressure

Question 11

What are baroreceptors?

Answer 11

mechanoreceptors located in the carotid sinus and in the aortic arch.

Their function is to sense pressure changes by responding to change in the tension of the arterial wall.

Question 12

regulation of Na+ is basically dependent on high and low ………..

Answer 12

baroreceptors

Question 13

JG cells name

Answer 13

juxtaglomerular cells

Question 14

What do JG cells produce?

Answer 14

the hormone Renin

Question 15

What does renin act on ?

Answer 15

angiotensinogen

Question 16

What does aldosterone promote?

Answer 16

Na+ excretion

Question 17

What is ANP?

Answer 17

Atrial Natriuretic Peptide