Homeostasis examples for a test

What is homeostasis?

The process by which the body maintains a stable internal environment despite changes outside.

Example of temperature regulation.

When body temperature rises, sweat glands activate to cool the skin through evaporation.

True or false: Homeostasis only involves temperature.

False, because it also includes pH levels, glucose levels, and other factors.

Difference between negative and positive feedback.

Negative feedback counteracts changes, while positive feedback enhances them.

Role of insulin in blood glucose regulation.

Insulin lowers blood glucose levels by facilitating its uptake into cells.

What happens when blood pH drops?

The body can increase breathing rate to reduce carbon dioxide and raise pH.

Fill in the blank: The hypothalamus helps regulate _______.

body temperature, thirst, and hunger.

What is osmoregulation?

The process of maintaining the balance of water and electrolytes in the body.

How does the body respond to dehydration?

It triggers thirst and releases antidiuretic hormone (ADH) to retain water.

True or false: All organs are involved in homeostasis.

True, because organs like the kidneys, lungs, and liver all play roles.

What is the role of the liver in homeostasis?

The liver regulates glucose, detoxifies substances, and metabolizes fats.

Example of thermoregulation.

Shivering generates heat when body temperature drops below normal.

Difference between ectotherms and endotherms.

Ectotherms rely on external sources for heat, while endotherms generate their own.

How do kidneys maintain homeostasis?

They filter blood to remove waste and balance electrolytes and water.

What triggers the release of adrenaline?

Stress or danger activates the fight-or-flight response, increasing heart rate.