Difficult
Compare the following: (Any two)
$(a)$ Central neural system $(CNS)$ and Peripheral neural system $(PNS)$
$(b)$ Resting potential and action potential
$(c)$ Choroid and retina
$(a)$ Central neural system $(CNS)$ and Peripheral neural system $(PNS)$
$(b)$ Resting potential and action potential
$(c)$ Choroid and retina
(A-D) Central neural system $(CNS)$ and Peripheral neural system $(PNS)$
$(b)$ Resting potential and action potential
$(c)$ Choroid and retina
| $(1)$ Central neural system $(CNS)$ is the main coordinating centre of the body. | $(1)$ Peripheral neural system $(PNS)$ is not the main coordinating centre of the body. |
| $(2)$ It includes the brain and spinal cord. | $(2)$ It includes cranial and spinal nerves that connect the central nervous system to different parts of the body. |
$(b)$ Resting potential and action potential
| $(1)$ Resting potential is the potential difference across the nerve fibre when there is no conduction of nerve impulse. | $(1)$ Action potential is the potential difference across the nerve fibre when there is conduction of nerve impulse. |
| $(2)$ The membrane is more permeable to $K^+$ ions than to $Na^+$ ions. | $(2)$ The membrane is more permeable to $Na^+$ ions than to $K^+$ ions. |
$(c)$ Choroid and retina
| $(1)$ Choroid is the middle vascular layer of the eye. | $(1)$ Retina is the innermost nervous coat of the eye. |
| $(2)$ It contains numerous blood vessels that provide nutrients and oxygen to the retina and other tissues. | $(2)$ It contains photoreceptor cells, rods and cones, that are associated with twilight and colour vision respectively. |
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View SolutionWhich of the following statements are correct?
$(i)$ $Ramus$ $dorsalis$ branch of spinal nerve contains sensory as well as motor nerve fibres.
(ii) The preganglionic nerve fibres arise from the entire spinal cord.
(iii) There are $31$ pairs of spinal nerves.
(iv) The somatic nervous system transmits impulses from $CNS$ to visceral organs.
$(v)$ Reflex action is a sudden,thoughtful,and voluntary response to the applied stimulus.
Select the correct option.
$(i)$ $Ramus$ $dorsalis$ branch of spinal nerve contains sensory as well as motor nerve fibres.
(ii) The preganglionic nerve fibres arise from the entire spinal cord.
(iii) There are $31$ pairs of spinal nerves.
(iv) The somatic nervous system transmits impulses from $CNS$ to visceral organs.
$(v)$ Reflex action is a sudden,thoughtful,and voluntary response to the applied stimulus.
Select the correct option.
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