Endocrine System

Question 1

What does it consist of

Answer 1

Contains glands
= secrete hormones into bloodstream
= spread throughout body

Question 2

Job of hormones

Answer 2

Some tissues have receptors that are specific to the hormone
= hormone act as signal to trigger changes inside cells

Question 3

Function of pituitary glands

Answer 3

Tell body what to do or tell other glands to release hormones

Question 4

Describe thyroid gland

Answer 4

Found in neck
Produces thyroxine
= regulate rate of metabolism and growth and development

Question 5

What happens when low thyroxine

Answer 5

Pituitary gland detects low levels
= release TSH
= stimulate thyroid to produce more thyroxine
= negative feedback

Question 6

Describe adrenal glands

Answer 6

Produce adrenaline
= increase heart rate
= more blood pumped

Question 7

Describe testes

Answer 7

Produce testosterone
= controls puberty
Hold sperm for reproduction

Question 8

Describe ovaries

Answer 8

Produce oestrogen
= puberty and menstrual cycle
Hold female gametes
= egg cells

Question 9

Difference of endocrine and nervous

Answer 9

Endocrine
- relies on hormones produced by glands and moved in blood
= hormones spread more slowly and effects last longer
- hormones act more generally

Nervous
- relies of electrical impulses transferred along nerve cells
= impulses spread very fast and effects don’t last long
- impulses sent to one specific area