The Endocrine System

Question 1

What is it?

Answer 1

Provides the body with a chemical system of communication via the blood stream
Works in tandem with the nervous system
Regulates a variety of bodily functions and behaviours

Question 2

Glands

Answer 2

Endocrine system consist of a network of glands
Structure that releases a variety of hormones
Different glands release different hormones

Question 3

Pituitary Gland

Answer 3

Master gland that releases hormones that control the actions of all other glands

Question 4

Hormones

Answer 4

Chemical released by glands
Travel via bloodstream to other glands to exert their effects
Each hormones has different function to certain organs such as regulating growth
Pituitary Gland- Releases ACTH. Controls release of hormones from other glands
Adrenal Gland- Releases adrenaline causes physiological changes

Question 5

Fight of Flight Response

Answer 5

Hypothalamus -> Sympatho-medullary pathway is activated -> Sympathetic branch of the autonomic nervous system -> Adrenal Medulla -> Adrenaline and Noradrenaline secreted -> Detected by receptors in target cells of the body leading to changes such as increased heartbeat

Question 6

Role of Adrenaline

Answer 6

Sweating- Cools down the body
Bladder- Emptying of the bladder is inhibited
Pupils- Dilate to increase awareness of external stimuli: