AP Biology Feedback Mechanisms

If the environment gets cold, we will often shiver in order to:

• keep body temperature the same as the external temperature
• decrease body temperature
• increase body temperature
• regulate blood pressure

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NGSS.HS-LS1-3

The "cause" for something to happen is the

• response
• effect
• stimulus
• homeostasis

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NGSS.HS-LS1-1

NGSS.HS-LS4-4

The "effect" of a given stimulus is the...

• response
• stimulus
• cause
• result

The two types of feedback systems that help organisms maintain homeostasis are:

• positive and negative 
• receptor and effector
• static and dynamic
• minor and major

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NGSS.HS-LS1-3

Maintaining body temperature is an example of a:

• negative feedback loop
• positive feedback loop

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NGSS.HS-LS1-3

When glucose levels in the blood rise, your brain sends a signal to your pancreas. The pancreas releases insulin, which opens channels in cell membranes to allow glucose to enter the cell, lowering blood sugar levels. 

• Positive Feedback Response
• Negative Feedback Loop 

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NGSS.HS-LS1-3

What is the point of a feedback loop?

• To provide the body with more energy

• To provide the body with more food

• To make sure the conditions in the body are always changing

• To make sure the conditions in the body remain stable

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NGSS.HS-LS1-3

In this body temperature feedback loop, predict what would happen if cooling mechanisms were NOT activated?

• The body would not warm up.

• The body would not cool down.

• Your body would get colder and colder.

• Your body would release lots of heat.

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NGSS.HS-LS1-3

The process of childbirth is an example of:

• negative feedback loop
• positive feedback loop

What type of feedback loop is shown?

• negative

• neutral

• positive

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NGSS.HS-LS1-3