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प्रश्न
Explain the following term :
Gray matter
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उत्तर
The cerebral cortex contains cell bodies of the neuron and is greyish in colour. It is called gray matter. The grey matter has many folds (i.e. gyri) and grooves (i.e. sulci). They increase the surface area to accommodate more nerve cells. A higher number of convolutions leads to greater intelligence.
संबंधित प्रश्न
What is a synapse?
In a synapse, chemical signal is transmitted from :
(a) axon to cell body of the same neuron
(b) cell body to axon end of the same neuron
(c) dendrite end of one neuron to axon end of adjacent neuron
(d) axon end of one neuron to dendrite end of adjacent neuron
State whether the following statement is true (T) or false (F):
The pigment melanin is present in inner layers of skin epidermis.
Give the functions of retina, pupil, and optic nerve.
Where is this located?
Effector organs
Give Technical Term:
The structure which joins the two cerebral hemispheres in man.
State the Location of:
Corpus callosum
Long answer question
Explain the Reflex Pathway with the help of a neat labelled diagram.
‘Injury to the medulla oblongata causes sudden death’ Explain.
Identify the motor nerves.
