Hormones

Question 1

What are hormones?

Answer 1

Chemical messengers sent in the blood

Question 2

What are target organs?

Answer 2

The organs that are affected only by specific hormones

Question 3

Name all the glands in the endocrine system.

Answer 3

• The pituitary gland
• Thyroid gland
• Adrenal glands
• The pancreas
• Ovaries (females only)
• Testes (males only)

Question 4

Why is the pituitary gland called the ‘master gland’?

Answer 4

The hormones it produces act on other glands, directing them to release hormones

Question 5

Name the hormones produced by the pituitary gland.

Answer 5

• TSH
• FSH
• LH

Question 6

Name the hormone produced by the thyroid gland.

Answer 6

Thyroxine

Question 7

Name the hormone produced by the adrenal glands.

Answer 7

Adrenaline

Question 8

Name the hormone produced by the pancreas.

Answer 8

Insulin

Question 9

Name the hormone produced by the ovaries.

Answer 9

Oestrogen

Question 10

Name the hormone produced by the testes.

Answer 10

Testosterone

Question 11

State two ways in which communication via the endocrine system differs from communication via the nervous system.

Answer 11

Any two from:

• The endocrine system uses hormones rather than electrical impulses
• In the endocrine system, messages travel via the blood rather than via neurones
• The effects of the endocrine system are slower
• The effects of the endocrine system are longer lasting