the edocrine system

Question 1

What is a hormone ?

Answer 1

chemical molecules released into the blood

Question 2

what is the endocrine system ?

Answer 2

composed of glands which secrete chemicals called hormones directly into the blood ?

Question 3

where does then blood carry hormones to ?

Answer 3

to the target organ where it produces effect .

Question 4

name the differences between hormonal and nervous responses ?

Answer 4

NERVES:
*very fast action
*act for a very short time 
*act on a precise area 
HORMONAL
*slower action
*long time 
*acts in a more general way

Question 5

Name all the hormones in the endocrine system .

Answer 5

• pituitary gland
• thyroid
• adrenal gland
• ovaries
• the pancreas
• testes

Question 6

what does the pituitary gland do ?

Answer 6

‘master gland’ located in the brain which secretes several hormones into the blood in response to body conditions in turn act on other glands to stimulate other hormones to be released to bring about effects.

Question 7

thyroid?

Answer 7

• produces thyroxine

* regulates rate of metabolism , heart rate ,temperature

Question 8

adrenal?

Answer 8

• produces adrenaline

* prepares the body for ‘flight or fight’

Question 9

ovaries

Answer 9

*produces oestrogen which is involved in the menstrual cycle

Question 10

testes

Answer 10

• produces testosterone

* controls puberty and sperm production in males

Question 11

the pancreas

Answer 11

• produces insulin

* used to regulate blood glucose level