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1) 2) 3) Controlling Blood Sugar Glucose Temperature
Controlled by the pancreas, rises (eat Insulin produced
by the pancreas Monitored by
diabetics do not produce food)
causes glucose to thermoregulatory
enough insulin
change to centre in brain and
Enzymes ­biological catalysts Treatments
glycogen receptors in skin.
that speed up reactions e.g. Injections or monitoring diet Normal Normal
respiration in the blood blood Too Hot
mitochondria Enzymes have an optimum glucose -hair lies flat
glucose
temperature and pH. level Glucagon released
1) Enzyme and substrate level. -blood vessels
Changes in pH/temp can and glycogen
2)Substrate binds to active site denature the enzyme so its dilate so heat lost
Glucose converted back to
shape changes and the through skin
3) Substrate is broken down falls glucose
substrate can't bind to the -sweat produced
active site (exercise)
Too Cold
Inheritance- Parents who are both carriers of
Uses of Enzymes the Cystic fibrosis allele (c). -goosebumps &
hairs trap air
-Biological washing powders ParentsCc x Cc
-blood vessels
-In baby foods Gametes C or c x C or c
constrict
-In slimming foods- fructose is (egg/sperm) C c
-no sweat
made using isomerases.
Possible Outcomes C CC Cc
Fructose is sweeter than -shiver, respiration
glucose so less is needed. 75% Normal c Cc cc releases heat
25% sufferers
Meiosis ­used to
Enzymes and digestion make the sex
Large molecules are broken down so they Mitosis-used for cells (gametes)
can be absorbed. normal cell -the chromosomes
Cystic Fibrosis
-Amylase breaks down starch into sugars in growth are copied
the mouth and small intestine. Caused by recessive allele (so 1) Parent cell -cell divides twice
-Proteases breakdown proteins into amino two copies of allele are needed). 2) Chromosomes make to give four cells
acids in the stomach and small intestine. identical copies
A thick sticky mucus is
-Lipases breakdown fats into fatty acids and of themselves
produced affecting air passages
and digestive systems 3)They line up along
glycerol in the small intestine.
the centre
4) They move apart
Huntingtons-Caused by dominant 5)Two daughter cells
Starch glucose form each with
allele (so only one of allele are
needed). Affects nervous system, 46 identical
shaking, erratic movements and chromosomes to
46=chromosomes in normal cell mental deterioration the parent cell
23=chromosomes in sex cells…read more

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