B12

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What controls your core body temperature?
Thermoregulatory centre
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Where is the thermoregulatory centre found?
Hypothalamus of your brain
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What does the centre contain?
Receptors which are sensitive to temp change in blood
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What temp difference can receptors detect?
0.5 degrees Celsius
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What happens to your blood vessels on the surface of your skin when you are too hot?
They dilate to let more blood flow through capillaries so transfer more energy out
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What is this dilation called?
Vasodilation
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What do your sweat glands do when you are too hot?
Produce more sweat, extra sweat cools down body as water evaporates
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What happens to your blood vessel when you are too cold?
They constrict to reduce blood flow, reduces energy transferred
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What is this constriction called?
Vasoconstriction
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What do your sweat glands do when you are too cold?
Stop production
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What do our skeletal muscles do when we are too cold?
Contract and relax rapidly, shivering, you need lots of energy to do it, an exothermic process, so body temp increases
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What does dissolved carbon dioxide produce?
An acidic solution
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What is urea?
The nitrogenous waste produced by breakdown of excess amino acids in Liver
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What is it called when liver removes amino group from amino acid?
Deamination
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What does deamination form?
Ammonia
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How is water lost with no control?
Exhaling,sweat
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How is water lost with control?
Kidneys
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Why can't large proteins + blood cells be filtered?
Too big
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How is glucose reabsorbed back into blood?
Diffusion + active transport
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What is selective re absorption?
Amount absorbed varies depending on what you need
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What is the renal artery?
Brings stuff to kidney
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What is the renal vein?
Brings stuff from kidney
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What hormone is used to control water balance?
AHD
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Where is ADH secreted from?
Pituitary gland
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What happens if blood is too concentrated?
Lots of ADH, so kidneys reabsorb water, concentrated urine
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What happens if blood is dilute?
Less ADH, kidneys reabsorb less, little urine,
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What is dialysis?
Function of kidney is carried out artifically
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What happens in dialysis?
Blood flows out and through partially permeable membrane to dialysis fluid
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What does the dialysis fluid contain?
Same concentration of useful substances of healthy person
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How long does dialysis take to be complete?
Around 8hrs
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What do dialysis patients have to make sure they manage carefully?
Diet
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What foods are these?
Salt + protein
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What helps stop blood clotting in dialysis?
Blood thinners
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What does blood flow through before going back to person?
A bubble trap to remove bubbles
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What are different on the new transplanted kidney?
Antigens
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What are antigens?
Proteins on the cell surface
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What is a risk with a transplant?
Antibodies will attack the antigens
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How can we reduce this risk?
Try and get a similar antigen match
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What else can be used to help reduce risk?
Immunosuppresent drugs
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What is the disadvantage of taking the drugs?
Patients don't deal effectively with infectious disease
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Other cards in this set

Card 2

Front

Where is the thermoregulatory centre found?

Back

Hypothalamus of your brain

Card 3

Front

What does the centre contain?

Back

Preview of the front of card 3

Card 4

Front

What temp difference can receptors detect?

Back

Preview of the front of card 4

Card 5

Front

What happens to your blood vessels on the surface of your skin when you are too hot?

Back

Preview of the front of card 5
View more cards

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