Advertisements
Advertisements
प्रश्न
Draw well labeled diagram of a ‘Neuron’ and name the following parts:
(1) Node of Ranvier (2) Nissil granules (3) Cyton
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
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
The organ A which is located inside the skull of our body is protected by a bony shell B. It is surrounded by three layers membranes C. The spaces between these layers are filled with a liquid D which protects organ A from mechanical shocks. Organ A in combination with another organ E makes up the central nervous system.
(a) What is organ A?
(b) What are B, C and D?
(c) Name the organ E.
(d) While walking barefoot, 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?
(e) If we step out from a darkened room into bright sunlight, we close our eyes for a moment. Which of the two organs: A or E, is directly involved in this action?
Put a tick mark (✓) against the correct alternative in the following statement:
The structural and functional unit of nervous system is a
Fill in the blank:
Sense organs have special cells called ____________ for picking up information and transmitting it to the nerves.
Find the odd-one-out, giving reasons:
Axon, cell body, dendrite, cerebellum
Complete the following table by filling in the blank spaces.
| Structure | Function |
| Yellow Spot | |
| Transfers impulse from inner ear to brain | |
| Helps to change the focal length of the eye lens | |
| Spinal cord | |
| Oval window | |
| Dynamic equilibrium |
Choose the correct answer.
Man has ______ pairs of spinal nerves.
The human nervous system is divided into ______ parts.
What are masses of grey matter located in white matter in the cerebral hemisphere?
How is an electric impulse created in human nervous system?
