Homeostasis and Feedback Loops

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 a feedback loop?

Back

A feedback loop is a biological mechanism in which the output of a system influences its own operation, often to maintain homeostasis.

Front

What is a negative feedback loop?

Back

A negative feedback loop is a process that counteracts a change in a system, helping to return it to its set point, such as regulating body temperature.

Front

What is a positive feedback loop?

Back

A positive feedback loop is a process that amplifies a change in a system, leading to an even greater change, such as during childbirth.

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 blood glucose levels, where insulin lowers blood sugar when it's high.

Front

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

Back

An example of a positive feedback loop is the release of oxytocin during childbirth, which increases contractions.

Front

How do platelets function in blood clotting?

Back

Platelets release hormones that signal more platelets to come to the site of a cut, forming a clot.

Front

Why are negative feedback loops important for the body?

Back

Negative feedback loops are important because they help maintain homeostasis and prevent extreme changes in the body.

Front

What happens during a positive feedback response?

Back

During a positive feedback response, the initial stimulus is amplified, leading to a greater response until a specific outcome is achieved.

Front

Is maintaining body temperature an example of a positive or negative feedback loop?

Back

Maintaining body temperature is an example of a negative feedback loop.