COORDINATION AND CONTROL

Question 1

what is the endocrine system?

Answer 1

system if glands that secrete hormones to send signals to effectors, transported via blood (slower than nervous system)

Question 2

what are the glands in the endocrine system?

Answer 2

pituitary gland (master gland), thyroid gland, pancreas, adrenal glands, ovaries, testies

Question 3

what does the thyroid gland do?

Answer 3

secretes thyroxine which controls your body’s metabolic rate

Question 4

what is FSH?

Answer 4

follicle stimulating hormone, from pituitary gland causes an egg to mature, and the ovaries to produce oestrogen

Question 5

what is oestrogen?

Answer 5

causes the uterus lining to thicken, and it inhibits FSH so no more eggs mature until the next cycle. It also causes the pituitary gland to secrete LH

Question 6

what is LH?

Answer 6

luteinising hormone, causes an egg to be released, which starts to travel towards the uterus. A sperm cell can fertiliser it while in the oviduct

Question 7

what is progesterone?

Answer 7

secreted by the ovaries maintains the uterus lining

Question 8

how does IVF work?

Answer 8

eggs are harvested from the women after inducing their release and then fertilised in a lab with the fathers sperm, any embryos that develop are inserted back into the uterus where they should hopefully embed in the lining and grow normally (success rate is very low with a risk of more than one baby born)