Control and Coordination class 10 science NCERT Exemplar multiple choice solution part 1

Control & Coordination

Exemplar Problems MCQ I

Which of the following statements is correct about receptors?

  1. Gustatory receptors detect taste while olfactory receptors detect smell
  2. Both gustatory and olfactory receptors detect smell
  3. Auditory receptors detect smell and olfactory receptors detect taste
  4. Olfactory receptors detect taste and gustatory receptors smell
    Answer: (a) Gustatory receptors detect taste while olfactory receptors detect smell

Electrical impulse travels in a neuron from

  1. Dendrite ⇨ axon ⇨ axonal end ⇨ cell body
  2. Cell body ⇨ dendrite ⇨ axon ⇨ axonal end
  3. Dendrite ⇨ cell body ⇨ axon ⇨ axonal end
  4. Axonal end ⇨ axon ⇨ cell body ⇨ dendrite
    Answer: (c) Dendrite ⇨ Cell body ⇨ Axon ⇨ Axonal end

In a synapse, chemical signal is transmitted from

  1. Dendritic end of one neuron to axonal end of another neuron
  2. Axon to cell body of the same neuron
  3. Cell body to axonal end of the same neuron
  4. Axonal end of one neuron to dendritic end of another neuron
    Answer: (d) Axonal end of one neuron to dendritic end of another neuron

In a neuron, conversion of electrical signal to a chemical signal occurs at/in

  1. Cell body
  2. Axonal end
  3. Dendritic end
  4. Axon
    Answer: (b) Axonal end

Which is the correct sequence of the components of a reflex arc?

  1. Receptors ⇨ Muscles ⇨ Sensory neuron ⇨ Motor neuron ⇨ Spinal cord
  2. Receptors ⇨ Motor neuron ⇨ Spinal cord ⇨ Sensory neuron ⇨ Muscle
  3. Receptors ⇨ Spinal cord ⇨ Sensory neuron ⇨ Motor neuron ⇨ Muscle
  4. Receptors ⇨ Sensory neuron ⇨ Spinal cord ⇨ Motor neuron ⇨ Muscle
    Answer: (d) Receptors ⇨ Sensory neuron ⇨ Spinal cord ⇨ Motor neuron ⇨ Muscle

Which of the following statements are true?

  1. Sudden action in response to something in the environment is called reflex action
  2. Sensory neurons carry signals from spinal cord to muscles
  3. Motor neurons carry signals from receptors to spinal cord
  4. The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc
  1. (i) and (ii)
  2. (i) and (iii)
  3. (i) and (iv)
  4. (i), (ii) and (iii)
    Answer: (c) (i) and (iv)

Which of the following statements are true about the brain?

  1. The main thinking part of brain is hind brain
  2. Centres of hearing, smell, memory, sight, etc. are located in forebrain.
  3. Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain
  4. Cerebellum does not control posture and balance of the body
    1. (i) and (ii)
    2. (i), (ii) and (iii)
    3. (ii) and (iii)
    4. (iii) and (iv)
      Answer: (c) (ii) and (iii)

    Posture and balance of the body is controlled by

    1. Cerebrum
    2. Cerebellum
    3. Medulla
    4. Pons
      Answer: (b) Cerebellum

    Spinal cord originates from

    1. Cerebrum
    2. Medulla
    3. Pons
    4. Cerebellum
      Answer: (b) Medulla

    The movement of shoot towards light is

    1. Geotropism
    2. Hydrotropism
    3. Chemotropism
    4. Phototropism
      Answer: (d) Phototropism


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