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 positive feedback loops?

Back

Positive feedback loops are processes that amplify a response or increase the output of a system, leading to a greater change in the same direction.

Front

Give an example of a positive feedback loop in the human body.

Back

An example of a positive feedback loop is the process of blood clotting, where platelets release chemicals that attract more platelets to the site of injury.

Front

What are negative feedback loops?

Back

Negative feedback loops are processes that counteract changes in a system, helping to maintain stability by reducing the output or effect of a stimulus.

Front

Give an example of a negative feedback loop in the human body.

Back

An example of a negative feedback loop is the regulation of body temperature, where the body sweats to cool down when overheated.

Front

What is the role of hormones in homeostasis?

Back

Hormones are chemical messengers that help regulate various physiological processes, including growth, metabolism, and homeostasis.

Front

What is the 'set point' in homeostasis?

Back

The 'set point' is the ideal value or range that a physiological variable should maintain for optimal functioning.

Front

How does the body respond to high blood sugar levels?

Back

The body responds to high blood sugar levels by releasing insulin, which helps cells absorb glucose and lowers blood sugar levels.

Front

What is the effect of a stimulus?

Back

The effect of a stimulus is the response generated by the body or system in reaction to that stimulus.

Front

What happens during a positive feedback response when a person is injured?

Back

During a positive feedback response when injured, hormones are released that signal platelets to come to the site, which in turn release more hormones to attract even more platelets.