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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
The gap between two neurons is called a ______.
What are the short fibres of a neuron known as?
What are the two main communications systems in an animal's body?
| The organ A which is located inside the skull of our body is protected by a bony box B and it is surrounded by three membranes C. The space between the membranes is filled with a liquid D which protects the organ A from mechanical shocks. The organ A in combination with another organ E makes up the central nervous system. |
- What is organ A?
- What are B, C and D?
- Name the organ E.
- While walking barefooted, if we happen to step on a sharp piece of stone, we immediately lift our foot up. Which of the two organs, A or E, is directly involved in this action?
- If we step out from a darkened room into bright sunshine, we close our eyes for a moment. Which of the two organs, A or E, is directly involved in this action?
Write one word in the space provided to complete the second pair of the related words pertaining to the nervous system.
Memory: cerebrum:: breathing:
Balance: cerebellum:: reasoning:
Define the following:
Neuron
What are the nerves? Mention the types of nerves found in humans.
Explain the Term: Reflex action
Short answer question
Distinguish between the sympathetic and parasympathetic nervous system on the basis of the effect they have on: a. Heartbeat b. Urinary Bladder
The nervous system consists of bones, cartilages, and joints.
