Homeostasis and negative feedback loops
10th grade (Year 11 in England) · 16 questions · Common Core: NGSS.HS-LS1-3 · England: GCSE Combined Science: Homeostasis and response
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Date
Score/ 16
Question 1
Why is it important to keep internal conditions within narrow limits?
- A. So that hair grows faster
- B. It is not important
- C. Enzymes and cells only work well in a narrow range of conditions
- D. So that we never feel hungry
Question 2
In a control system, what role do these play: light-sensitive cells in the retina?
- A. receptor
- B. coordination centre
- C. effector
Question 3
Homeostasis: which statement is NOT true?
- A. Body temperature is kept close to 37 °C.
- B. Effectors can be muscles or glands.
- C. Homeostasis uses both nervous and hormonal responses.
- D. Receptors carry out the response.
Question 4
Why is it important to keep internal conditions within narrow limits?
- A. It is not important
- B. Enzymes and cells only work well in a narrow range of conditions
- C. So that we never feel hungry
- D. So that hair grows faster
Question 5
In a control system, what role do these play: temperature receptors in the skin?
- A. receptor
- B. coordination centre
- C. effector
Question 6
Homeostasis: which statement is NOT true?
- A. Homeostasis uses both nervous and hormonal responses.
- B. Homeostasis keeps every internal condition exactly constant.
- C. Effectors can be muscles or glands.
- D. In negative feedback, a rise in a value triggers changes that lower it.
Question 7
Why is it important to keep internal conditions within narrow limits?
- A. Enzymes and cells only work well in a narrow range of conditions
- B. It is not important
- C. So that hair grows faster
- D. So that we never feel hungry
Question 8
In a control system, what role do these play: light-sensitive cells in the retina?
- A. receptor
- B. coordination centre
- C. effector
Question 9
Homeostasis: which statement is NOT true?
- A. Body temperature is kept close to 37 °C.
- B. Negative feedback makes changes bigger.
- C. Effectors can be muscles or glands.
- D. Homeostasis uses both nervous and hormonal responses.
Question 10
Which is NOT controlled by homeostasis in humans?
- A. eye colour
- B. water levels in the body
- C. blood glucose concentration
- D. body temperature
Question 11
In a control system, what role do these play: the thermoregulatory centre in the brain?
- A. receptor
- B. coordination centre
- C. effector
Question 12
Homeostasis: which statement is NOT true?
- A. Negative feedback makes changes bigger.
- B. Effectors can be muscles or glands.
- C. In negative feedback, a rise in a value triggers changes that lower it.
- D. Homeostasis uses both nervous and hormonal responses.
Question 13
A room thermostat switches the heating on when the room gets cold and off when it warms up. How is this like homeostasis?
- A. It has no sensor
- B. It uses negative feedback to keep conditions near a set point
- C. It uses positive feedback to keep heating forever
- D. It changes the set point every minute
Question 14
In a control system, what role do these play: sweat glands?
- A. receptor
- B. coordination centre
- C. effector
Question 15
Homeostasis: which statement is NOT true?
- A. Negative feedback makes changes bigger.
- B. Effectors can be muscles or glands.
- C. Homeostasis uses both nervous and hormonal responses.
- D. Body temperature is kept close to 37 °C.
Question 16
A room thermostat switches the heating on when the room gets cold and off when it warms up. How is this like homeostasis?
- A. It uses positive feedback to keep heating forever
- B. It uses negative feedback to keep conditions near a set point
- C. It has no sensor
- D. It changes the set point every minute
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