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18 Cards in this Set

  • Front
  • Back

what is a chemical hormone

chemicals that help control body functions

what do hormones control

things like menstration in women as well as the changes that occur to our bodies during puberty and homeostasis

where do hormones have an effect

on target organs

state 3 places in the body where horones are produced

brain, testis, pancreas, adrenal gland, ovary and thyroid gland

how do hormones travel around the body

through the blood stream

what is a gland

parts of tissues and organs in the body that secrete substances e.g. hormones.

table for 6

water current- water leaves the body by: lungs whe we breath out, skin when we sweat, kidneys in the urine.


ion current- ions are lost by skin when we sweat, kidneys in the urin


temperature- to maintain the temperature at which enzymes work best for chemical reactions in the cells. normal bdy temperature is 37 degrees celcius


blood glucose levels- controlled by the pancreas to provide the cells with a constent supply of energy.

describe how a person can conserve water in a survival situation

avoid exercise, stay in the shad, dont lie on hot ground, dont eat, dont talk and breath through your mouth

what is the menstral cycle

the reproductive cycle in women controlled by hormones

how long does the menstral cycle last

28 days

at what day in the month of the menstral cycle in the egg released

14th day

what is the role of follicle stimulating hormone (FSH) where is it produced

causes the egg to mature, stimulates ovary to produce oestrogen prodcued in the pituitry gland

what is the role of luteinsing LH, where it produces

triggers release of egg from the ovary produced in the pituitry gland

what is the role of oestrogen, where is it produced

stimultes the lining of the womb to develop and stimulates pituitary gland to make LH produced in the overies.

if a eg is not fertilised what happens

the lining of the womb breaks down, and the egg leaves the body in the period.

how do contraceptives use hormones to control fertility.

inhibits production of FSHs egs dont mature in the ovaries

which hormones will be included in "fertility drugs"

FSh used to stimulate eggs to mature and trigger oestrogen production

what hapens during in vitro fertilisation IVF

eggs collected and fertilised in the lab the implanted.