Homeostasis 0.0 / 5 ? BiologyHomeostasisGCSEAQA Created by: amyclaireCreated on: 31-03-16 19:40 Reasons why CO2 conc may change Activity level (respiration increases) 1 of 18 Reasons why urea conc may change Eating lots of protein, excessive exercise, dehydration 2 of 18 Reasons why water conc may change Drinking too much/little, exercise causes sweating, increased body temperature 3 of 18 Reasons why ion (salt) conc may change Eating lots of salty foods, sweating lots 4 of 18 Reasons why core body temp may change Intense exercise, external temperature, fever 5 of 18 Reasons why blood sugar conc may change Eating a meal, eating sugary foods, exercise, not eating, stress 6 of 18 Effects if CO2 conc not controlled pH lower, enzymes affected (activity reduced), blood more acidic 7 of 18 Effects if urea conc not controlled It is toxic, if enough builds up it is fatal, cells stop working properly 8 of 18 Effects if water conc not controlled Cells swell, brain swells, seizures, dehydration, cramps, death, more urine 9 of 18 Effects if ion (salt) conc not controlled High blood pressure, more urine, coma, muscle contraction reduced 10 of 18 Effects if core body temp not controlled Tiredness, clumsiness, confusion, heat stroke, nausea, seizures, coma, enzymes denature 11 of 18 Effects if blood sugar conc not controlled Coma as body breaks down fat, dehydration, kidney damage, eyes, nerves, blood vessels, cells don't work properly 12 of 18 How CO2 conc is controlled Breathing rate and depth change, level detected in medulla 13 of 18 How urea conc is controlled Urine, urea leaves through urine, bladder, produced in liver, transported to kidney 14 of 18 How water conc is controlled Water loss from lungs, exhalation, the skin, swear, urine, kidneys, out of blood 15 of 18 How ion (salt) conc is controlled Loss of ions through sweat and urine in blood 16 of 18 How core body temp is controlled Hairs up/ down, sweating, shivering, widening of blood vessels, hypothalamus 17 of 18 How blood sugar conc is controlled Insulin, secreted from pancreas into blood, can convert glucose into glycogen if too high 18 of 18
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