Class 10 Biology



Control & Coordination

Exemplar Problems MCQ I

Which of the following statements is correct about receptors?

  • Gustatory receptors detect taste while olfactory receptors detect smell
  • Both gustatory and olfactory receptors detect smell
  • Auditory receptors detect smell and olfactory receptors detect taste
  • 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

  • Dendrite ⇨ axon ⇨ axonal end ⇨ cell body
  • Cell body ⇨ dendrite ⇨ axon ⇨ axonal end
  • Dendrite ⇨ cell body ⇨ axon ⇨ axonal end
  • Axonal end ⇨ axon ⇨ cell body ⇨ dendrite
    Answer: (c) Dendrite ⇨ Cell body ⇨ Axon ⇨ Axonal end

In a synapse, chemical signal is transmitted from

  • Dendritic end of one neuron to axonal end of another neuron
  • Axon to cell body of the same neuron
  • Cell body to axonal end of the same neuron
  • 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

  • Cell body
  • Axonal end
  • Dendritic end
  • Axon
    Answer: (b) Axonal end

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

  • Receptors ⇨ Muscles ⇨ Sensory neuron ⇨ Motor neuron ⇨ Spinal cord
  • Receptors ⇨ Motor neuron ⇨ Spinal cord ⇨ Sensory neuron ⇨ Muscle
  • Receptors ⇨ Spinal cord ⇨ Sensory neuron ⇨ Motor neuron ⇨ Muscle
  • 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?

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

Which of the following statements are true about the brain?

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

Posture and balance of the body is controlled by

  • Cerebrum
  • Cerebellum
  • Medulla
  • Pons
    Answer: (b) Cerebellum

Spinal cord originates from

  • Cerebrum
  • Medulla
  • Pons
  • Cerebellum
    Answer: (b) Medulla

The movement of shoot towards light is

  • Geotropism
  • Hydrotropism
  • Chemotropism
  • Phototropism
    Answer: (d) Phototropism