NCERT Class X Science Class: Chapter –7. Control and Coordination – Part-1

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Multiple Choice Questions

Question 1:

Which of the following statements is correct about receptors?

(a) Gustatory receptors detect taste while olfactory receptors detect smell

(b) Both gustatory and olfactory receptors detect smell

(c) Auditory receptors detect smell and olfactory receptors detect taste

(d) Olfactory receptors detect taste and gustatory receptors smell

Answer: A

Image Gustatory receptors detect

Image Gustatory Receptors Detect

Question 2:

Electrical impulse travels in a neuron from





Answer: C

Question 3:

In a synapse, chemical signal is transmitted from

(a) Dendritic end of one neuron to axonal end of another neuron

(b) Axon to cell body of the same neuron

(c) Cell body to axonal end of the same neuron

(d) Axonal end of one neuron to dendritic end of another neuron

Answer: D

Image neuron

Image Neuron

Question 4:

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

(a) Cell body

(b) Axonal end

(c) Dendritic end

(d) Axon

Answer: B

Image chemical signal occurs at/in axonal end

Image Chemical Signal Occurs at/in Axonal End

Question 5:

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





Answer: D

Image sequence of the components of a reflex arc

Image Sequence of the Components of a Reflex Arc

Question 6:

Which of the following statements are true?

(i) Sudden action in response to something in the environment is called reflex action

(ii) Sensory neurons carry signals from spinal cord to muscles

(iii) Motor neurons carry signals from receptors to spinal cord

(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc

(a) (i) and (ii)

(b) (i) and (iii)

(c) (i) and (iv)

(d) (i) , (ii) and (iii)

Answer: C

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