Homeostasis and Feedback Mechanisms 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. This is an example of a:

• Positive Feedback Loop

• Negative Feedback Loop

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NGSS.HS-LS1-3

An example of a negative feedback loop is ...

• Blood glucose regulation

• Blood pressure regulation

• Thermoregulation

• All of the above

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NGSS.HS-LS1-3

An example of a positive feedback loop is ____________.

• Childbirth

• Blood Pressure regulation

• Body Temperature regulation

• All of the above

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NGSS.HS-LS1-3

Homeostasis

• allows for a wildly fluctuating internal environment
• is impossible in vertebrates
• is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
• is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation

Tags

NGSS.HS-LS1-3

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

What type of feedback loop is shown?

• negative
• neutral 
• positive

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NGSS.HS-LS1-3

What type of feedback loop is shown?

• Positive
• Neutral
• Negative

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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