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Spinal Cord

Axons of preg...

Question

Axons of preganglionic neurons in the human sympathetic nervous system emerge from which of the following regions of the spinal cord?

A

Cranial and sacral

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B

Thoracic and lumbar

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C

Cranial and thoracic

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D

Lumbar and sacral

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Solution

The correct option is A Thoracic and lumbar
Anatomically, the sympathetic preganglionic neurons, the cell bodies of which are located within the central nervous system, originate in the lateral horns of 12 thoracic and first 2 or 3 lumbar segments of the spinal cord.
So, option B is the correct option.

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Similar questions

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).

Q. Short / Long answer type question:
Which division- sympathetic or parasympathetic of the autonomic nervous system has longer preganglionic fibres and why?

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Q. Name the following:

(i) Nervous system including brain and spinal cord.
(ii) Sympathetic and parasympathetic jointly forms.
(iii) Terminal end of spinal cord.
(iv) The third neurone that is involved in reflexes, other than simple reflex.
(v) Study of structure and functions of nervous system.
(vi) Nerve which carry impulse from sensory receptor to CNS.
(vii) The nerve which carry impulse from CNS to muscles.
(viii) The peripheral matter of spinal nerve.
(ix) The peripheral matter of the brain.
(x) Outermost meningial membrane of spinal cord.
(xi) Structural and metabolic unit of nervous tissue.
(xii) The biological term given to the protective membranes of the brain.
(xiii) Cavity in which brain is situated.
(xiv) The neobrain.
(xv) The important centre of emotion.
(xvi) Paired lobes of midbrain related to the vision.
(xvii) Paired lobes of the brain related to the sense of smell.
(xviii) Fissure between the cerebral hemispheres.
(xix) Inability to write.
(xx) The busiest organ of the body.
(xxi) Inability to speak.
(xxii) The longest cranial nerve.
(xxiii) Thoracolumber region of spinal cord form.
(xxiv) Highly branched axon's end.
(xxv) Neuron only with axon.
(xxvi) White part of the eye.
(xxvii) Short sightedness.
(xxviii) Part of internal ear related to balance.
(xxix) The photosensitive pigment present in the rod cells of the retina.

Q. The diagram given below is a representation of a certain phenomenon pertaining to the nervous system. Study the diagram and answer the following questions:
How does the arrangement of neurons in the spinal cord differ from that of the brain?

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