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Types of Neurons

Dorsal root o...

Question

Dorsal root of spinal nerve contains

A

Sensory neurons only

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B

Relay and sensory neurons

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C

Sensory and motor neurons

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D

Motor and relay neurons

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Solution

The correct option is A Sensory neurons only
The spinal ganglia or dorsal root ganglia contain the cell bodies of sensory neurons entering the cord at that region. nerve a group of fibers (axons) outside the CNS. The spinal nerves contains the fibers of the sensory and motor neurons. So, the correct answer is (A)

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Q. Question 5
Which is the correct sequence of the components of a reflex arc?

(a) Receptors→ Muscles→ Sensory neuron→ Motor neuron→ Spinal cord
(b) Receptors→ Motor neuron → Spinal cord → Sensory neuron → Muscle
(c) Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
(d) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Q. Question 5
Which is the correct sequence of the components of a reflex arc?

(a) Receptors→ Muscles→ Sensory neuron→ Motor neuron→ Spinal cord
(b) Receptors→ Motor neuron → Spinal cord → Sensory neuron → Muscle
(c) Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
(d) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Q. One of the following gives the correct sequence of the components in a reflex arc. This is :
(a) Receptors → Muscle → Sensory neuron → Motor neuron → Spinal cord
(b) Receptors → Motor neuron → Spinal cord → Sensory neuron → Muscle
(c) Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
(d) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Q. Motor neurons of the frontal nerve to the frontal ganglion join the sensory neurons of the labral nerve to form the labrofrontal nerve arising from the tritocerebrum.

Q. Receptor, Spinal cord, Effector, Motor neuron, Sensory neuron.

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