Osomoregulation

Question 1

What are the kidneys responsible for

Answer 1

For homeostatic control of water and ions

Question 2

What are the 4 stages of nephrons

Answer 2

Ultrafiltration and production of glomerular filtrate (Bowman’s capsule)

Reabsorption of glucose and water (ptc)

Maintain of sodium gradient (loop of henle ) to allow

Reabsorption is water (DOT CD)

Question 3

What can blood water potential be affected by

Answer 3

An increase or decrease in blood solutes

An increase or decrease in water in take

Question 4

Responding to a fall in water potential

Answer 4

This could be due to to much sweating

Too much water being consumed

Large amount of ions being consumed

Question 5

Where are osmoreceptors found

Answer 5

In the hypothalamus of the brain

Question 6

What does osomoreceptors detect

Answer 6

The changes in blood water potential

Question 7

What happens when water potential drops

Answer 7

The water exits by osmosis, the cells then shrink and produce ADH

Question 8

What is ADH

Answer 8

Antidirotic hormone

Question 9

Which gland produces ADH

Answer 9

Pituitary gland

Question 10

Does the reabsorption of water effect water potential

Answer 10

It will not increase water potential of the blood it only slows it down

Question 11

What will need to happen for water to increase

Answer 11

More water needs to be consumed. The osmoreceptors send an impulse to the thirst centre of the brain

Question 12

Responding to a rise in water potential

Answer 12

Consumption of water

Execretion of ions that are not replaced

Ions being used up in the metabolism

Question 13

When water potential of blood increase….

Answer 13

Osomoreceptors sect rise in water potential

Question 14

What does osmoreceptors decrease

Answer 14

The rate of electrical impulses which reduces the release of ADH

Question 15

What does less ADH mean

Answer 15

Less osomsis

More dilute urine, water potential is reduced to normal level

Question 16

what does the osmoreceptors in the hypothalamus of the brain detect

Answer 16

changes in the blood potential

Question 17

when the potential drops water exits through the cells via what transformation

Answer 17

osmosis

Question 18

what do the cells do after the water exists through the cells

Answer 18

the cells then shrink and produce ADH (Antidiuretic Hormone)

Question 19

where does the ADH travel to in responding to the fall in potential

Answer 19

ADH travels to the posterior pituitary gland(via an axon)

the osmoreceptor cells also send electrical impulses to the PPG
ADH is released from the PPG and into the blood
ADH then travels to the kidney

Question 20

responding to a rise in water potential is due to

Answer 20

consumption of water
excretion of ions that are not replaced
ions being used up in metabolism

Question 21

what well the reabsorption of water do to the water potential

Answer 21

it will not increase water potential of the blood- it just slows down the decrease

Question 22

what needs to be done for the water to increase

Answer 22

to increase, more water needs to be done to be consumed. The osmoreceptors send an impulse to the thirst centre of the brain.

Question 23

responding to a rise in water potential

Answer 23

when the water potential of the blood increases osmoreceptors detect rise in water potential

They decrease the rate of electrical impulses which reduces the release of ADH

less ADH fewer aquaporins less osmosis out of DCT/CD

More dilute urine reduced to normal levels

Question 24

blood water potential can be effected by

Answer 24

An increase or decrease in blood solutes

An increase or decrease in water intake