Examples of Negative and Positive Feedback

When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.

• Positive Feedback Response

• Negative Feedback Loop 

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NGSS.HS-LS1-3

What are the two types of feedback systems/loops?

• Effector/receptor 

• Positive/Negative

• Nerevous/Endocrine

• Brain/Hormones

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NGSS.HS-LS1-3

Type of feedback loop that reverses the original stimuli. 

• Negative 

• Positive 

• Responder 

• Control center 

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NGSS.HS-LS1-3

A cycle of events that checks the status of a controlled condition.

• Homeostasis

• Physiological limit

• Feedback system/loop

• Responsiveness

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NGSS.HS-LS1-3

Which are the following are true about negative feedback:

• It rarely occurs

• It reverses the sensation of the stimuli/stress

• It enhances the sensation of the stimuli/stress

• It regulates blood pressure & body temperature

• It occurs more frequently/often

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NGSS.HS-LS1-3

In a feedback loop, what does the RECEPTOR do?

• receives messages from the control center

• Detects the stimulus and sends info to the brain or control center

• decides what action the body needs to take to maintain homeostasis

• Carries out the response to get our bodies back to the set point

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NGSS.HS-LS1-3

Which two are examples of positive feedback mechanisms (loops)?

• A/C system

• Heater

• A woman having contractions during labor

• A fruit causing other fruits around it to ripen

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NGSS.HS-LS1-3

Which of the following is an example of a positive feedback mechanism in the human body?

• Blood clotting process

• Regulation of blood sugar levels

• Body temperature regulation

• Breathing rate control

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NGSS.HS-LS1-3

What is the primary characteristic of a negative feedback loop?

• Amplifies the initial stimulus

• Reverses the initial stimulus

• Maintains the initial stimulus

• Ignores the initial stimulus

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NGSS.HS-LS1-3

During childbirth, the release of oxytocin to intensify labor contractions is an example of which type of feedback?

• Negative feedback

• Positive feedback

• Neutral feedback

• No feedback

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NGSS.HS-LS1-3