Class 12 Biology · Chapter 1 · Test 1
Homeostasis and Feedback Mechanisms
35 MCQs
35 questions · 30 min · 35 marks
Sample questions
The first 5 of 35. Try each one, then tap to see the answer.
Question 1
Which term covers the rest of the three?
- AOsmoregulation
- BExcretion
- CThermoregulation
- DHomeostasis
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Answer: D
Thermoregulation, osmoregulation and excretion are all important processes of homeostasis.
Question 2
Homeostasis is the process by which living organisms:
- AObtain energy from food
- BMaintain a stable internal environment
- CAdapt only to external temperature
- DRemove all metabolic wastes
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Answer: B
Homeostasis maintains a stable internal environment despite changes in the external environment.
Question 3
Which of the following is NOT an important process of homeostasis?
- AThermoregulation
- BOsmoregulation
- CExcretion
- DPhotosynthesis
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Answer: D
Photosynthesis is not a homeostatic process; the important ones are thermoregulation, osmoregulation and excretion.
Question 4
How many essential elements work together to maintain homeostasis?
- A2
- B4
- C3
- D5
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Answer: C
Homeostasis depends on three elements: receptors, control centre and effectors.
Question 5
Which of the following is NOT an essential element of homeostatic mechanisms?
- ATransporters
- BReceptors
- CControl centre
- DEffectors
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Answer: A
The three elements are receptors, control centre and effectors.
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