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Biology
Spinal Nerves
Question

Which of the following sentence is correct for cranial nerve?
  1. It is only connected with parasympathetic path
  2. It is associated with sympathetic pathway
  3. Originates from spinal cord
  4. It transports both motor and sensory impulses

A
It is only connected with parasympathetic path
B
It is associated with sympathetic pathway
C
It transports both motor and sensory impulses
D
Originates from spinal cord
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Solution
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  • Cranial nerves are the nerves that emerge directly from the brain including the brain stem.
  • The cranial nerves provide motor and sensory innervation mainly to the structures within the head and neck. The cranial nerve is associated with both sympathetic and parasympathetic pathways. Hence cranial nerve transports both motor and sensory impulses.
  • So, the correct answer is 'It transports both motor and sensory impulses'.

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Q1

Differentiate between the following pairs with reference to the aspect in brackets.

(a) Cerebrum and cerebellum (function).

(b) Sympathetic nervous system and parasympathetic nervous system (overall effect on the body).

(c) Sensory nerve and motor nerve (direction of impulse carried).

(d) Medulla oblongata & Cerebellum (function).

(e) Cerebrum and spinal cord (arrangement of cytons and axons of neurons).

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Q2
Which of the following cranial nerves of man is both sensory and motor?
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Q3
Which of the following cranial nerve of man is both sensory and motor?
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Q4
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
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Q5

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

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