Bio grade 9 homeostasis

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 are the two types of feedback mechanisms in homeostasis?

Back

The two types of feedback mechanisms are positive feedback and negative feedback.

Front

What is a positive feedback mechanism?

Back

A positive feedback mechanism amplifies a response or process, leading to an increase in the output. An example is the release of growth hormones during puberty.

Front

What is a negative feedback mechanism?

Back

A negative feedback mechanism counteracts a change, reducing the output to maintain stability. An example is the regulation of body temperature.

Front

What hormone is produced by the pancreas to lower blood sugar levels?

Back

Insulin is the hormone produced by the pancreas that lowers blood sugar levels.

Front

What hormone raises blood sugar levels?

Back

Glucagon is the hormone that raises blood sugar levels.

Front

How does the body respond to high blood sugar levels?

Back

The body releases insulin to help lower blood sugar levels by facilitating the uptake of glucose by cells.

Front

How does the body respond to low blood sugar levels?

Back

The body releases glucagon to increase blood sugar levels by promoting the release of glucose from the liver.

Front

What is an example of a negative feedback loop in temperature regulation?

Back

When body temperature rises, mechanisms such as sweating are activated to cool the body down, restoring normal temperature.

Front

What is an example of a positive feedback loop in childbirth?

Back

During childbirth, the release of oxytocin increases contractions, which leads to more oxytocin being released until delivery.