Unit 4 Test Practice

Front

What is the excretory system responsible for?

Back

The excretory system is responsible for excreting waste from the blood and regulating water balance in the body.

Front

What is negative feedback in biological systems?

Back

Negative feedback is a process that counteracts a stimulus to help a system return to homeostasis.

Front

What is a positive feedback loop?

Back

A positive feedback loop amplifies a response or process, moving the system away from its starting state.

Front

Which body system is responsible for the immune response?

Back

The lymphatic system is responsible for maintaining the immune response in the body.

Front

What happens to blood vessels when the body senses warmth?

Back

When the body senses warmth, blood vessels dilate and sweating begins to cool the body down.

Front

What is homeostasis?

Back

Homeostasis is the process by which biological systems maintain stability while adjusting to conditions that are optimal for survival.

Front

What is the role of the lymphatic system?

Back

The lymphatic system helps defend the body against infections and maintains fluid balance.

Front

What is an example of a negative feedback mechanism?

Back

An example of a negative feedback mechanism is the regulation of body temperature; when the body gets too warm, it sweats to cool down.

Front

What is the difference between positive and negative feedback?

Back

Positive feedback enhances or increases changes; negative feedback reduces or counteracts changes.

Front

What occurs to blood sugar levels after eating?

Back

After eating, blood sugar levels rise, and the body responds by releasing insulin to lower blood sugar levels.