HideShow resource information
What is a stimulus?
A change in your environment which you may need to react to. (light, sound)
1 of 16
Give two sense organs
Eyes, ears
2 of 16
What are receptors?
Receptors are groups of cells which are sensitive to a stimulus.
3 of 16
What does the central nervous system consist of?
Brain & spinal cord
4 of 16
What are neurones?
They transmit information as electrical impulses to the CNS.
5 of 16
Give two effectors
Muscles & glands
6 of 16
What is a synapse?
Connection between two neurons transferred by chemicals
7 of 16
What are reflexes & what do they do?
Reflexes are quick, short responses to certain stimuli which releases the hormone adrenaline & they prevent injury
8 of 16
Describe how the reflex arc goes through the central nervous system
9 of 16
What are hormones?
Chemical messengers which travel in the blood to activate target cells.
10 of 16
What are hormones secreted by?
11 of 16
What do the pituitary gland & ovary produce?
Pituitary gland: FSH, LH Ovaries: OESTROGEN
12 of 16
What are the differences between nerves & hormones?
Hormones: slower action,act for a long time, act in a more general way Nerves: Fast action, acts for a short time, act on a very precise area
13 of 16
What are the 4 stages of the menstrual cycle?
1) Day 1 is when the uterus lining breaks down. 2) From day 4-14 the lining of the uterus builds up again. 3) At day 4 an egg is released. 4) The wall is then maintained for 14 days until day 28. If there is no fertilised egg, the lining breaks down
14 of 16
What are the 3 main hormones in the menstrual cycle?
FSH, Oestrogen, LH
15 of 16
What are the jobs of FSH,Oestrogen,LH & what are they produced by?
FSH: Produced by pituitary gland, causes an egg to mature in one of the ovaries. Oestrogen: Produced by ovaries & causes pituitary to produce LH. LH: Produced by pituitary gland & stimulates the release of an egg
16 of 16

Other cards in this set

Card 2


Give two sense organs


Eyes, ears

Card 3


What are receptors?


Preview of the front of card 3

Card 4


What does the central nervous system consist of?


Preview of the front of card 4

Card 5


What are neurones?


Preview of the front of card 5
View more cards


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Nervous system, hormones and behaviour resources »