Endocrine System

Question 1

Hormones

Answer 1

Chemical messengers secreted from structures in the body which pass through the bloodstream to cause changes in our body or behaviour

Question 2

Thyroid Gland

Answer 2

Hormone: THYROXINE
Regulates metabolic rate and protein synthesis
Does this by affecting cells in the heart that increases heart rate and affects cells throughout the body increasing metabolic rates

Question 3

Testes

Answer 3

Hormone: Testosterone
Male sexual characteristics, muscle mass

Question 4

Ovaries

Answer 4

Hormone: Oestrogen
Female sexual characteristics, menstruation, pregnancy

Question 5

Pineal Gland

Answer 5

Hormone: Melatonin
Sleep-wake cycle

Question 6

Pituitary Gland

Answer 6

The master gland and controls release of hormones

Question 7

Endocrine System and ANS

Answer 7

They work in parallel in stressful situations

-When a stress is perceived, the hypothalamus triggers activity in the sympathetic branch of the ANS.

-The ANS changes from its normal resting state PANS to SANS .

-The stress hormone, adrenaline, is released from adrenal medulla into the bloodstream

-Adrenaline triggers psychological changes in target organs and causes: Increased heart rate, dilation of pupils and decreased production of saliva

-Once the threat passes, PANS returns body to resting state, ‘rest and digest response;