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प्रश्न
Differentiate between:
Rods and Cones.
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उत्तर
| Rods | Cones |
| These are neurons concerned with vision in poor light. | These are neurons concerned with detailed clear vision and colour perception. |
| They contain rhodopsin. | They have iodopsin. They don’t have rhodopsin. |
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संबंधित प्रश्न
The diagram given below is a representation of a certain phenomenon pertaining to the nervous system. Study the diagram and answer the following questions:
(i) Name the phenomenon which is being depicted.
(ii) Give the technical term for the point of contact between the two nerve cells.
(iii) Name the parts 1, 2, 3, and 4.
(iv) Write the functions of parts 5 and 6
(v) How does the arrangement of neurons in the spinal cord differ from that of the brain?
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
Repolarisation - Depolarisation - Resting (polarised) (during conduction of nerve impulse through a nerve fibre)
What does the neural tissue consist of?
Which cells are responsible for formation of myelin sheath?
What is the connective tissue covering around the nerve fascicle called?
Each branch of the axon terminates as a bulb-like structure called ______
Chemicals which are released at the synaptic junction are called ______.
Write one word for the following:
The kind of nerve carrying impulses from the brain to a gland or muscle.
Which of the following structures is absent in nerve cells?
Define the following term:
Synaptic cleft
