(Wk3) Endocrine System

Question 1

What is the endocrine system?

Answer 1

Consists of glands that produce hormones, that target specific things in the body.

Question 2

What is a hormone?

Answer 2

-A chemical substance
-Synthesised and secreted by a specific gland
-Secreted in small amounts into the bloodstream
-Acts at a site distant from the site of secretion
-Acts on specific receptors to give a specific physiological effect.

Question 3

Name some classical endocrine glands of the body.

Answer 3

-Pituitary
-Hypothalamus
-Thymus
-Adrenals
-Ovaries (female)
-Thyroid
-Pancreas
-Testes (Male)

Question 4

What do Hormones do?

Answer 4

They play a part in:
1) Reproduction
2) Growth and Development
3) Maintenance in the internal environment
4) Regulation of digestion and energy availability

Question 5

What are the 4 classifications of hormones?

Answer 5

-Proteins
-Peptides
-Amino Acid derivatives
-Lipids and Steroids

Question 6

How do hormones act on target cells?

Answer 6

-Act on specific receptors
-Regulate the activity of the target cell
-Mechanism of action depends on nature of hormone.