AQA B1a science

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menstrual cycle

What hormone is used in contraceptive pills?

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Oesrogen

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Menstrual cycle

what hormone(s) is/are used in fertility treatment?

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LH and FSH

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menstrual cycle

what order are the hormones in and what do they do?

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FSH (stimulate egg to mature, production of oestrogen)
Oestrogen (stopped FSH, starts LH and stimulates lining of the womb)
LH (stops oestrogen, releases egg) 

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Reflex arc

what do these letters stand for 

S
R
S
R
M
E
R  

(remember them, silly rabbit, silly rabbit, make elephant run) 

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stimulus

receptor

sensory neurone

relay neurone

motor neurone

effector

response  

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Thalidomide

what was thalidomide originally used for?

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sleeping pill

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Thalidomide

what was it found effective for?

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morning sickness for pregnant women

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Thalidomide

What happened to the babies of the women who took it for morning sickness?

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they were born with deformed limbs

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Thalidomide

why did this happen?

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it wasn't tested on pregnant animals so no-one knew it was going to happen

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cholesterol

are LDL's good or bad? are HDL's good or bad?

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LDL's- bad
HDL's good 

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cholesterol

if there is a lack of cholesterol, which organ secrets it?

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the Liver

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cholesterol

what do LDL's do? (in full?)

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they form plaques in the artery wall, reducing or stopping the blood flow, and without oxygen from the blood the heart muscle stops beating properly, sometimes causing a heart attack.

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cholesterol

are monounsaturated and polyunsaturated fats good or bad?

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good as they lower bad cholesterol and improve the balance

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cholesterol

if the liver makes to much cholesterol what can you take to level it out?

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statins (they inhibit the enzymes involved in making cholesterol) 

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Body defences

what are the 3 ways our body is designed to deal with bacteria or viruses? 

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ingest bacteria

produce anti-bodies

produce anti-toxins

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disease

what are pathogens?

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micro-organisms that cause infectious diseases

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