Homeostasis, feedback and thermoregulation Quiz
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5 questions, one answer each
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1. Which describes negative feedback?
- A. A change is amplified
- B. A change is reversed
- C. A change is ignored
- D. A change is detected by effectors
2. Which is an example of positive feedback?
- A. Sweating when hot
- B. Vasoconstriction when cold
- C. Oxytocin strengthening uterine contractions during labour
- D. Shivering when cold
3. Which structure acts as the coordinator in thermoregulation?
- A. Sweat gland
- B. Skin arteriole
- C. Thermoreceptor in the skin
- D. Hypothalamus
4. Which response occurs when core body temperature falls?
- A. Vasodilation of skin arterioles
- B. Erector pili muscles relax
- C. Shivering
- D. Increased sweating
5. Why does high body temperature threaten survival?
- A. Hydrogen bonds in enzymes break so they denature
- B. Molecules have too little kinetic energy
- C. Arterioles constrict
- D. Sweat glands stop working immediately