excretory system

Question 1

OSMOREGULATION

Answer 1

The process by which the water content and the ion concentration is regulated and kept constant in an organisms cells. This process results in maintaining the osmotic pressure in the blood and tissue fluids.

Question 2

Excretion

Answer 2

The removal of harmful and unwanted toxic waste products of metabolism.

Question 3

Secretion

Answer 3

The production of useful chemical substances like hormones, enzymes or other molecules by the cells of glands.

Question 4

Egestion

Answer 4

The expelling of the undigested wastes from the body. Food which is not digested is passed to the rectum and egested out in the form of faeces or excreta

Question 5

Some mechanisms of water balance include

Answer 5

• Metabolic water
• Evaporation
• structural features
• Waste products: urine produced in the kidneys get rid of water as well as waste from the body

Question 6

DIFFUSION

Answer 6

movement of substances from high concentration to low concentration.

Question 7

HYPERTONIC AND HYPOTONIC AND ISOTONIC

Answer 7

HYPERTONIC – solution with high concentration of substance compared to comparative solution.
HYPOTONIC – solution with low concentration of substance compared to comparative solution.
ISOTONIC – solution with same concentration of substance compared to comparative solution.

Question 8

EXCRETORY ORGANS

Answer 8

Skin
Lungs
Liver
Kidneys
Ureter
Bladder
Urethra