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 are the two main types of feedback loops involved in homeostasis?

Back

Negative feedback and positive feedback.

Front

What is a negative feedback loop?

Back

A negative feedback loop is a process that counteracts a change, bringing the system back to its set point.

Front

What is a positive feedback loop?

Back

A positive feedback loop is a process that amplifies or increases the original change, moving the system away from its set point.

Front

What is a set point in the context of homeostasis?

Back

A set point is the ideal value or range for a physiological variable that the body tries to maintain.

Front

Give an example of a physiological variable that has a set point.

Back

Body temperature, blood glucose levels, and pH levels are examples of physiological variables with set points.

Front

True or False: Maintaining a stable body temperature is an example of homeostasis.

Back

True.

Front

What happens during a positive feedback loop in childbirth?

Back

During childbirth, contractions increase in intensity and frequency, amplifying the process until delivery occurs.

Front

True or False: The feedback loop created during childbirth is an example of homeostasis.

Back

False.

Front

What role do sensors play in homeostasis?

Back

Sensors detect changes in the internal environment and send signals to the control center.