Topic 4 Excretory System

Question 1

• Type of waste removal

Answer 1

Excretory System

Question 2

• Maintenance of osmotic pressure of fluids by control of water and salt concentrations

Answer 2

1. Osmoregulation

Question 3

• body is hypotonic to environment -> water is constantly lost by osmosis, so these fish are constantly drinking water, rarely urination, and secreting accumulated salts through gills

Answer 3

a. Marine Fish

Question 4

• Body is hypertonic to environment -> water moves in, so fish are rarely drinking water, constantly urinating, and absorbing salt through gills

Answer 4

b. Fresh Water Fish