4. Homeostasis

It ensures optimal conditions for cells and bodily functions

It helps the body grow taller

It increases the speed of digestion

It makes bones stronger

Maintaining a stable internal environment for optimal cell function

Increasing the rate of cell division

Producing energy for movement

Regulating external environmental changes

Temperature

pH

Fluid balance

Blood pressure

To sense changes and trigger responses to restore stability

To amplify changes in the internal environment

To stop all biological processes

To increase body temperature continuously

Evaporation

Radiation

Conduction

Convection

Arterioles release sweat and sweat glands control blood flow.

Arterioles control blood flow and sweat glands release sweat to cool the body.

Both arterioles and sweat glands only conserve heat.

Sweat glands and arterioles are not regulated by the nervous system.

Smaller organisms lose heat faster due to a larger surface area relative to their volume.

Larger organisms lose heat faster than smaller organisms.

Surface area to volume ratio does not affect heat exchange.

Larger organisms retain heat more effectively due to a smaller surface area relative to their volume.

Insulin and glucagon; insulin lowers blood glucose and glucagon raises it.

Insulin and adrenaline; both lower blood glucose.

Glucagon and cortisol; both raise blood glucose.

Insulin and thyroxine; both lower blood glucose.

Urination, sweating, and respiration

Only urination

Only sweating

Only respiration

Dizziness

Dry mouth

Headache

Increased urine output