Osmoregulation of Fish

Question 1

What is osmoregulation in marine fish?

Answer 1

-they lose water by osmosis so they drink sea water to compensate

Get rid of salt bay:
-excrete salt through gills
-pee a small volume of concentrated salty urine

Question 2

What is osmoregulation in freshwater fish?

Answer 2

-Gains water by osmosis (through skin) so does not drink water
Needs to retain salt by:
-absorbing salt through gills
-pee large volume of diluted urine

Question 3

True or false: Marine fish drink seawater to compensate for water loss

Answer 3

True

Question 4

True or false: Freshwater fish does not drink water

Answer 4

True

Question 5

True or false: Freshwater fish drinks seawater

Answer 5

False

Question 6

True or false: Marine fish lose water by osmosis

Answer 6

true

Question 7

True or false: Marine fish do not drink water

Answer 7

false

Question 8

True or false: Marine fish gain water by osmosis

Answer 8

false

Question 9

True of false: Freshwater lose water by osmosis

Answer 9

false

Question 10

True of false: Freshwater gain water by osmosis

Answer 10

true