NGSS.HS-LS1-3

This cell organelle helps organisms maintain homeostasis by controlling what substances may enter or leave cells.

• vacuole
• nucleus
• cell membrane
• cell wall

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Insulin

• lowers your blood sugar levels
• blocks the sugar in your bloodstream from doing what it is supposed to do
• gives you diabetes

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During strenuous exercise, body temperature increases. The body responds to the increase in temperature by sweating, which helps to reduce the body temperature. Which is demonstrated in this situation?

• excretion

• metabolism

• homeostasis

• synthesis

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A positive feedback loop

• is when feedback into a system increases a rate of response

• is when feedback into a system decreases a rate of response

• may be seen in some examples of population growth

• both a and c

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What type of feedback loop is shown?

• negative
• neutral 
• positive

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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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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

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NGSS.HS-LS1-3

A steady or balanced state of the body

• Homeostasis
• Homeopathy
• Negative feedback
• Postive feedback

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A thermostat in a central heating system can determine the temperature of your living room. It switches the air conditioner on when the temperature increases to a predetermined level and shuts it off when it cools to another level. The room temperature remains within a comfortable level regardless of the temperature outside

• Positive Feedback

• Negative Feedback

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Following a large loss of blood, as in severe hemorrhage, blood pressure will?

• Increase

• Decrease

• Remain the same

• Increase, then decrease

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