Human Physiology Kidney

Question 1

Define Excretion

Answer 1

Removal of waste products of metabolism from the body

Question 2

Two functions of Excretory System Performs

Answer 2

1) Removes nitrogenous wastes that may be toxic to the body in large concentrations
2) Removes excess water to maintain a suitable osmolarity within the tissues and cells

Question 3

Defecation and excretion

Answer 3

Not considered as that’s undigested food products and not metabolic waste products

Question 4

Aquatic Animals remove nitrogenous waste via

Answer 4

Ammonia

Question 5

Mammals and excretory waste

Answer 5

Urea

Question 6

Reptiles and Birds and excretory products

Answer 6

Uris Acid

Question 7

Animals are either ? Depending on how they maintain their internal osmotic conditions

Answer 7

Osmoconformers or osmoregulators

Question 8

Osmoconformers

Answer 8

Mainatten Internal conditions that are equal to the osmolarity of their Environment.
Require less energy as they minimise the water movement in and out of the cell
Ex : Jellyfish

Question 9

Osmoregulators

Answer 9

Keep their bodys osmolarity constant regardless of Environmental conditions .
Energy intensive process, as it has to ensure that the osmotic conditions are always tightly controlled
Ex : Mammals

Question 10

Specialised excretory system for osmoregulation and removal of nitrogenous system

Answer 10

Insects - malpighian tubules (connected to the digestive system of the animal)
Mammals - Kidney (Connects to the digestive system of the animal)

Question 11

Malphigian Tubules