Homeostasis (mocks)

Question 1

Define homeostasis

Answer 1

The maintenance of a constant/stable internal environment.

Question 2

Give 4 effects of oestrogen in developing secondary sexual characteristics.

Answer 2

Breasts develop, body hair grows, menstruation starts, hips get wider

Question 3

Give 5 effects of testosterone on males

Answer 3

Voice breaks, testes start producing sperm, body and facial hair grows, muscles develop, penis and testes grow

Question 4

State the source of adrenaline

Answer 4

The adrenal gland, when ACTH is released by the pituitary gland.

Question 5

Give 3 effects of adrenaline

Answer 5

• increased heart rate + breathing rate
• initiates conversion of glycogen into glucose in the liver
• blood is diverted from the digestive systems to the muscles in the limbs

Question 6

State the source of insulin

Answer 6

Pancreas

Question 7

What is the role and effect of insulin.

Answer 7

To restore normal glucose levels when they are too high by stimulating the liver to convert glucose into glycogen.

Question 8

Why is adrenaline not an example of negative feedback?

Answer 8

As adrenaline does is not reverting conditions back to normal/optimal levels.

Question 9

Define a hormone

Answer 9

A chemical messenger released by glands into the blood and carried to a target organ