Endocrine system and the fight or flight response

Question 1

Endocrine system

Answer 1

One of the body’s major information systems that instructs glands to release hormones directly into the bloodstream. Hormones carried towards target organs in the body.

Question 2

Gland

Answer 2

An organ in the body that synthesises substances such as hormones.

Question 3

Hormones

Answer 3

Chemical substances that circulate in the bloodstream and only affect target organs. They’re produced in large quantities but disappear quickly. Have very powerful effects.

Question 4

Fight or flight response

Answer 4

The way an animal responds when stressed out. Body is physiologically aroused in readiness to fight an aggressor or flee.

Question 5

Adrenaline

Answer 5

A hormone produced by the adrenal glands which is part of the human body’s immediate stress response system. Adrenaline has a strong effect on the cells of the cardiovascular system, stimulating heart rate, contracting blood vessels and dilating air passages.