Negative Feedback

Negative feedback is a crucial process in maintaining homeostasis, ensuring the body's internal environment remains stable. It involves detecting changes in variables like temperature or blood sugar and activating mechanisms to return them to a set point. The hypothalamus plays a key role in this process. An example is blood sugar regulation, where insulin and glucagon adjust glucose levels. Negative feedback is a continuous cycle, correcting deviations to maintain balance.

What is the primary function of homeostasis in the body?

• To increase body temperature

• To maintain a constant internal environment

• To disrupt salt balance

• To decrease oxygen levels

Why is the process called 'negative feedback'?

• Because it amplifies the initial stimulus

• Because it causes a reaction opposite to the stimulus

• Because it stops all body functions

• Because it only works in cold environments

Which part of the brain is responsible for homeostasis?

• Medulla oblongata

• Hypothalamus

• Cerebellum

• Cerebrum

What hormone is released when blood glucose levels rise?

• Adrenaline

• Insulin

• Cortisol

• Glucagon

How does glucagon affect blood glucose levels?

• It converts glucose to glycogen

• It decreases blood glucose levels

• It has no effect on glucose levels

• It increases blood glucose levels