Homeostasis

A self regulating process, by which a living organism can maintain internal stability while adjusting to changes in external conditions.

To prevent hypothermia, overheating and your cells from denaturing.

If it is too low or too high your cells will denature.

To avoid: - Hyperglycaemia (Your body’s blood glucose levels are higher than the standard range). - Hypoglycaemia (Your body’s blood glucose levels are lower than the standard range).

So you don’t get dehydrated and so your cells don’t swell.

A normal biological response in which the effects of a reaction slow or stop that reaction. It regulates.

This is when the product of a reaction leads to an increase in that reaction. It does not regulate.

During labour a hormone called oxytocin is released, causing stronger contractions. These stronger reactions stimulate the release of more oxytocin. This cycle continues till birth.

A process which occurs when you are too hot or too cold.

• Your blood vessels dilate to release heat. • Sweat is produced and heat leaves via evaporation. • Your heart rate increases to circulate blood faster.

• You shiver to generate heat. • Your blood vessels constrict to reduce heat loss. • Your metabolism increases to produce more heat.

When your blood vessels narrow, to reduce blood flow to regulate your temperature. This reduces heat loss.

When your blood vessels widen, to allow more blood to flow through, increasing blood flow. This releases heat.

An organism that regulates its body temperature internally.

An organism that relies on its environment to regulate its body temperature.

• The Islets of Langerhans (Regions in the pancreas with endocrine function). • Insulin (Helps to use sugar for energy). • Glucagon (If your blood sugar is low this is released, signalling the liver to release stored glucose). • Alpha cells (Produce glucagon to increase blood sugar). • Beta cells (Produce and release insulin). • Glycogenesis (When glucose is stored in the body as glycogen). • Glycogenolysis (When glycogen is turned into glucose when a quick source of energy is needed). • Gluconeogenesis (When new glucose are created from non-carbohydrate sources like amino acids and glycerol).

Regions in the pancreas with endocrine function, that contain alpha and beta islet cells.

Helps blood sugar enter the body’s cells so it can be used for energy.

If your blood sugar is low this is released, signalling the liver to release stored glucose.

Produce glucagon to increase blood sugar.

Produce and release insulin.

When glucose is stored in the body as glycogen.

When glycogen is turned into glucose when a quick source of energy is needed.

When new glucose are created from non-carbohydrate sources like amino acids and glycerol.