Positive and Negative Feedback Loops Practice

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

The process of childbirth is an example of:

• negative feedback loop
• positive feedback loop

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

Failure to maintain homeostasis could result in:

• lack of internal balance
• eventual death
• difficulty carrying on metabolism 
• all three

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NGSS.HS-LS1-3

Humans have ___ for body temperature, blood glucose concentrations, electrolyte concentrations, pH levels, tendon tension and variables.

• positive feedback mechanisms
• set points
• a wide internal range
• no regulation

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NGSS.HS-LS1-3

The name for a chemical made by glands that tell cells to make something or respond in some way.

• acid
• enzyme
• perspiration
• hormone

Tags

NGSS.HS-LS1-3

Which of these does homeostasis most directly relate?

• Stability

• Evolution

• Scale and Structure

• Interacting systems

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NGSS.HS-LS1-3