Feedback Loops

Homeostasis:

• allows for a wildly fluctuating internal environment

• 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 does not incorporate a form of feedback regulation

• when you stay at home

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NGSS.HS-LS1-3

Detects change and sends a message to the control center

• receptor

• control center

• effector

• regulation

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In a positive feedback loop, each action creates a consequence that _____________________ the other action.

• decreases

• has no effect on

• amplifies

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The image here shows a type of response the body takes to maintain homeostasis. The mechanism (way) by which the body control's body temperature is maintained by

• natural selection.

• positive feedback.

• negative feedback.

• an electronic device.

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What type of feedback loop is shown?

• negative
• neutral 
• positive

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Negative Feedback Loops:

• amplify processes
• prevent small changes from getting larger
• are initiated during childbirth
• are found only in plants

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According to the feedback loop, what happens when blood sugar gets too high?

• Insulin is released

• Glucagon is released

• More glucose is released

• Glycogen is broken down

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The tendency of an organism to maintain a balanced state in order to stay healthy.

• Stimuli
• Response
• Tropism
• Homestasis

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In a negative feedback loop, what happens to a variable (like temperature) when it increases past its normal state?

• It continues to increase.

• It decreases until it resumes its normal state.

• It decreases until it is lower than its normal state.

• It does not change.

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The body needs oxygen to effectively breakdown glucose into ATP for energy. As you exercise, the amount of oxygen in the blood decreases. In response, the breathing rate increases to bring the oxygen levels back up. This is an example of...

• Positive feedback mechanism

• Hormone

• Homeostatic state

• Negative Feedback mechanism

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