Unit 2 Flashcard Review: Body Systems and Feedback

Front

What is the purpose of a feedback loop in the body?

Back

To make sure the conditions in the body remain stable.

Front

What happens when the environment gets cold?

Back

We shiver to increase body temperature.

Front

What is the primary function of the digestive system?

Back

To break down food into useful nutrients.

Front

What role do guard cells play in plants?

Back

They change the size of leaf openings, regulating the exchange of gases.

Front

What is homeostasis?

Back

The process by which the body maintains a stable internal environment.

Front

What is the role of the nervous system in feedback mechanisms?

Back

It detects changes in the environment and sends signals to the body to respond.

Front

How does the body respond to overheating?

Back

By sweating to cool down.

Front

What is negative feedback?

Back

A process that counteracts a change to bring the system back to its set point.

Front

What is positive feedback?

Back

A process that amplifies a change, moving the system away from its set point.

Front

What is the function of the respiratory system?

Back

To take in oxygen and excrete carbon dioxide.