B12 - Homeostasis in action

Question 1

ADH

Answer 1

A hormone secreted by the pituitary gland that stimulates absorption of water by the kidneys and thus controls the concentration of body fluids.

Question 2

Delaminating

Answer 2

The breakdown of an amino acid in the liver when there is an excess of amino acids (from proteins). This forms urea which is removed from the body as urine.

Question 3

Dialysis

Answer 3

The process of cleansing the blood through a dialysis machine when the kidneys have failed.

Question 4

Exhalation

Answer 4

The process by which gas is expelled from the lungs.

Question 5

Pituitary gland

Answer 5

Small gland in the brain which produces a range of hormones controlling body functions.

Question 6

Thermoregulatory centre

Answer 6

The area of the brain which is sensitive to the temperature of the blood.

Question 7

Thyroxine

Answer 7

The main hormone secreted by the thyroid gland.

Question 8

Urea

Answer 8

The waste product formed by the breakdown of excess amino acids in the liver.

Question 9

Vasoconstriction

Answer 9

The reduction in the internal diameter of blood vessels to reduce the loss of heat from the body.

Question 10

Vasodilation

Answer 10

The increase in the internal diameter of blood vessels to increase the loss of heat from the body.