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Class 12 Biology · Chapter 3 · Test 1

Neurons and Reflex Arc

36 MCQs

MCQs

36 questions · 30 min · 36 marks

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Sample questions

The first 5 of 36. Try each one, then tap to see the answer.

  1. Question 1

    Chemical coordination in humans is controlled by the:

    • ANervous system
    • BEndocrine system
    • CDigestive system
    • DExcretory system
    Show answer

    Answer: B

    The two types of coordination are nervous (nervous system) and chemical (endocrine system).

  2. Question 2

    Nervous coordination is carried out by means of:

    • AHormones
    • BEnzymes
    • CElectrical signals
    • DVitamins
    Show answer

    Answer: C

    Nervous coordination works through electrical signals (nerve impulses).

  3. Question 3

    Receptors act as transducers because they:

    • AConvert one form of energy into another
    • BStore energy
    • CProduce hormones
    • DProcess information in the brain
    Show answer

    Answer: A

    Receptors convert stimulus energy into nerve impulses (electrochemical energy).

  4. Question 4

    Rod and cone cells of the retina convert light energy into:

    • AHeat energy
    • BSound energy
    • CChemical hormones
    • DNerve impulses
    Show answer

    Answer: D

    They are transducers that convert light into electrochemical nerve impulses.

  5. Question 5

    Receptors generate nerve impulses in:

    • AMotor neurons
    • BSensory neurons
    • CInter-neurons
    • DEffectors
    Show answer

    Answer: B

    Receptors generate impulses in sensory neurons which carry them to the CNS.

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