Animal cordination, control and homeostasis

Question 1

What are hormones?

Answer 1

small chemicals that release into the blood stream. they attach to specific cells that have correct receptors which causes a change in cells

Question 2

What are functions of target organs?

Answer 2

1) pituitary gland : master gland that produces multiple hormones that regulate body conditions and the hormones released controls what other glands do
2) thyroid glands : release thyroxine -> regulates date of metabolism, heart rate temperature
3) adrenal glands : release adrenaline for fifth or flight response
4) pancreas - releases insulin to regulate the blood glucose concentration
5) testes - produces testerone and controls sperm production
6. ovaries - release oestrogen for puberty and menuetral cycle in

Question 3

Describe differences in endocrine and nervous systems.

Answer 3

Endocrine systems:
- relies on hormones
- transported by blood & glands
- spread slowly
- effects last longer
- acts more generally

Nervous system:
-relies on electrical impulses
- transported through nerve cells
-very fast
- effects aren’t long lasting
- acts on precise area