5.3.1 Human endocrine system

Question 1

The endocrine system

Answer 1

• made up of glands which secrete hormones directly into the bloodstream
• blood carries the hormone to a target organ where it produces an effect

Question 2

3 ways that the coordination by the endocrine system is different from the coordination by the nervous system

Answer 2

1. slower
2. longer-lasting
3. (chemical / hormone) via blood instead of electrical impulses / neurones

Question 3

Pituitary gland

Answer 3

• found in the brain
• a ‘master gland’
• secretes several hormones into the blood in response to the body conditions
• these hormones in turn act on other glands to stimulate other hormones to be released to bring about effects