Question

Watch Amoeba sisters “ homeostasis and negative / positive feedback”

Based off the video
Write 5. . Negative feedback/ positive feedbacks they stated on the video.
Take notes to explain homeostasis and how negative and positive feedback are essential to maintaining homeostasis.

Write in a 7th graders response

Answer 1

I can’t watch the video, but I know the same examples the Amoeba Sisters usually use. Here are five feedback examples (they’re the kinds of examples in that video), and simple notes a 7th grader can use to explain homeostasis and how negative and positive feedback help keep the body working.

Five feedback examples (with type)
- Body temperature — negative feedback (sweating when hot, shivering when cold)
- Blood sugar (glucose) — negative feedback (insulin lowers high blood sugar, glucagon raises low blood sugar)
- Water balance / thirst and ADH — negative feedback (kidneys hold on to water or release it)
- Childbirth — positive feedback (oxytocin makes stronger contractions until baby is born)
- Blood clotting — positive feedback (platelets call more platelets to stop bleeding)

Notes to explain homeostasis (7th grade level)
- What is homeostasis?
- Homeostasis means keeping the inside of your body steady and balanced (like temperature, water, and blood sugar) so your cells can work well.
- The body works like a thermostat: it has a set point (like 98.6°F for temperature) and tries to stay near that point.

- How the body keeps homeostasis (parts)
- Sensor/receptor: detects a change (example: your skin senses when you are cold).
- Control center: decides what to do (usually the brain).
- Effector: does the action to fix the change (muscles shiver, sweat glands sweat).

- Negative feedback (main way the body keeps steady)
- Negative feedback fixes a change by doing the opposite of what’s happening. It brings things back to the set point.
- Example: If you get too hot, you sweat. Sweating cools you down and returns you to the normal temperature.
- This is used for most body jobs like temperature, blood sugar, and water balance.

- Positive feedback (used for quick, big changes)
- Positive feedback makes a change bigger instead of bringing it back. It keeps increasing until a goal is reached.
- Example: During childbirth, contractions cause the release of oxytocin, which makes contractions stronger until the baby is born.
- Positive feedback is less common and usually helps finish a process fast (like stopping bleeding or delivering a baby).

- Why both are important
- Negative feedback keeps things steady every day so you stay healthy.
- Positive feedback helps in special situations that need a fast, big result (like giving birth or forming a clot).
- Together they help the body respond correctly to different situations and protect you.

If you want, I can make a one-page study sheet with these examples and a drawing of the thermostat analogy. Which would you prefer?