Control of extracellular fluid osmolarity and extracellular fluid volume.

Question 1

Control of extracellular fluid osmolarity and extracellular fluid volume - 1

Answer 1

ADH

Question 2

Control of extracellular fluid osmolarity and extracellular fluid volume - 2

Answer 2

RAAS

Question 3

Control of extracellular fluid osmolarity and extracellular fluid volume - 3

Answer 3

ANP

Question 4

Control of extracellular fluid osmolarity and extracellular fluid volume - 4

Answer 4

baroreceptor reflex

located in carotid artery/ aortic arch
detect changes in blood pressure

Question 5

Control of extracellular fluid osmolarity and extracellular fluid volume - 5

Answer 5

thirst mechanism

more thirst = detected by osmoreceptors in hypothalamus

more water intake
- diluted ECF
- less osmolarity

Question 6

Control of extracellular fluid osmolarity and extracellular fluid volume - 6

Answer 6

NEURAL

SNS
- beta adrenergic receptors + noradrenaline = afferent arteriole of kidney constricted

• secretes renin

PNS
- ach + muscarinic receptors = afferent arterioles of kidney dilated

• inhibits renin

Question 7

Control of extracellular fluid osmolarity and extracellular fluid volume - 7

Answer 7

HYPERVOLEMIA = high blood volume
- ANP released
- RAAS inhibited

Question 8

Control of extracellular fluid osmolarity and extracellular fluid volume - 8

Answer 8

HYPOVELEMIA = low blood volume
- stimulates RAAS
- stimulates ADH