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17 Cards in this Set
- Front
- Back
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What is a hormone? |
Chemicals that help control body functions |
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what do hormones control? |
things like menstruation in women as well as the changes that occur to our bodies during puberty and homeostasis |
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where do hormones have an effect? |
on target organs |
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state 3 places in the body where hormones are produced |
Brain, testis, pancreas, adrenal ggland, ovary and thyriod gland |
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how do hormones travel around the body? |
in the blood |
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what is a gland? |
pats of tissues and organs in the body that secrete substances e.g. hormones. Factor controlled by homeostasis Water content- Water leaves the body by; lungs when we breathe out, skin when we sweat, kidneys in the urine. Ion content- Ions are lost by; skin when we sweat, kidneys in the urine. Temperature- To maintain the temperature at which enzyms work best for chemical reactions in the cells. Normal body temperature in 37'C Blood Glucose levels- Controlled by the pancreas to provide the cells with a constnt supply of energy.
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Describe how a personcan conserve water in a survival situation |
- Avoid exercise, stay in the shade, dont lie on hot ground, dont eat, dont talk and breathe through your mouth. |
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what is the menstrual cycle? |
the reproductive cycle in women controlled by hormones |
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how long does the menstrual cycle last? |
28 days |
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at what day in the month of the menstrual cycle is the egg released? |
14th |
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what is the role of the follicle stimulting hormone (FSH)? where is it produced? |
causes the egg to mature stimulates ovary to produce oestrogen produced in te pituitary gland. |
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what is the role of luteinising hormone (LH)> where isit produced? |
Triggers release of egg from the ovary produced in the pituitary gland. |
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what is the role of oestrogen? where is it produced? |
Stimulats the ining of the womb to develop and stimulates pituitary gland to make LH produced in th ovaries |
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if an egg is not fertilised what happens? |
the lining of the womb breaks down and the egg leaves the body in a period. |
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how do contraceptives use hormones to control fertility? |
inhabits production of FSH so eggs dont mature in the ovaries |
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Which hormones will be included in "fertility drugs"? |
FSH used to stimulate eggs to matur and trigger oestrogen production |
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Whatg happens during in vitro fertilisation (IVF)? |
eggs collected and fertilised in the lab then inplanted |
