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प्रश्न
Give one point of difference between the following on the basis of what is indicated:
Cerebrum and spinal cord. (Arrangement of neurons)
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उत्तर १
The arrangement of neurons in
Cerebrum: cytons are present outside and axons are inside
Spinal cord: cytons are present inside and axons are outside.
उत्तर २
| Cerebrum | Spinal cord |
| The inner portion of the cerebrum consists of white matter, mainly containing the axons (nerve fibers) of the neurons. | The inner portion of the spinal cord consists of gray matter containing the cell bodies, motor, and associated neurons whereas the white matter forms the outer layer. |
संबंधित प्रश्न
Fill in the blank with the function in the following:
Meninges: ______
Spinal cord and sympathetic ganglion of autonomous nervous system are connected by ______________.
Give Technical Term:
The fluid which fills the central canal of the spinal cord.
The diagram given below shows the internal structure of the spinal cord, depicting a simple reflex. Study the same and then answer the questions that follow:
(i) Name the parts numbered 1 to 5.
(ii) Using the letters of the alphabet shown in the figure indicate the direction in which an impulse enters and leaves the spinal cord.
(iii) What is the term given to the point of contact between two nerve cells?
(iv) What is meant by ‘simple reflex’ ? Give two examples of simple reflexes and name the stimuli too.
(v) How does the arrangement of nerve cells in the spinal cord differ from that in the brain?
The diagram given below represents the spinal cord of a mammal, seen in a transverse section together with the nerves. Study the diagram and then answer the questions given below:
(i) Label the parts 1—8 indicated by guidelines.
(ii) What do the arrows indicate? What is the pathway indicated termed?
(iii) What type of nerve is shown in the diagram?
Which neuron conducts impulse from the spinal cord to the effector organ?
Spinal cord is enclosed in ____________ of vertebral column.
______ connects the brain to a different part of the body through nerves.
How are cytons and axons arranged in the spinal cord?
Explain the formation of a typical spinal nerve with the help of a neat labelled diagram.
