Key learning points

1. If conditions in the body change too much this can be dangerous to our health (e.g. enzymes).
2. Homeostasis is the regulation of internal conditions for optimum enzyme activity.
3. Glucose travels in the blood plasma and is delivered to cells for aerobic respiration.
4. The hormone insulin helps to keep human blood sugar level constant.
5. The pancreas secretes insulin when blood sugar level is too high; it causes liver cells to convert glucose to glycogen.

Keywords

• Homeostasis - homeostasis is the regulation of the internal conditions to maintain optimum conditions for enzyme action and all cell functions

• Respiration - a chemical reaction in living organisms that releases energy from glucose

• Insulin - a hormone secreted by the pancreas when blood glucose is too high, lowering blood glucose levels

• Glucose - a sugar that travels in the blood and is supplied to cells for respiration

• Glycogen - a stored form of glucose found in liver and muscle cells

Common misconception