Biology: Homeostasis and Feedback 10-Q Review

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is thermoregulation?

Back

Thermoregulation is the process by which the body maintains its core internal temperature within a narrow range, despite external temperature changes.

Front

What happens to blood vessels during overheating?

Back

Blood vessels dilate, allowing more blood to flow to the skin's surface to release heat.

Front

What is the role of sweat glands in thermoregulation?

Back

Sweat glands produce sweat, which evaporates from the skin surface, helping to cool the body down.

Front

What is negative feedback in biological systems?

Back

Negative feedback is a mechanism that reverses a change in a controlled condition, helping to maintain homeostasis.

Front

What is an example of a negative feedback mechanism?

Back

An example is the regulation of body temperature: when the body gets too hot, mechanisms are activated to cool it down.

Front

What happens to the body when it gets too cold?

Back

The body responds by shivering, constricting blood vessels, and increasing metabolism to generate heat.

Front

What is the function of the cell membrane in maintaining homeostasis?

Back

The cell membrane controls what enters and leaves the cell, helping to maintain a stable internal environment.

Front

What is the effect of capillary dilation in response to heat?

Back

Capillary dilation increases blood flow to the skin, promoting heat loss through radiation and evaporation.

Front

What is the role of metabolism in thermoregulation?

Back

Metabolism generates heat; an increase in metabolic rate can help warm the body when it is cold.