What does CNS stand for? Which part of CNS: (a) consists of two cerebral hemispheres, and (b) has spinal nerves attached to it?

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Solution

CNS stands for Central Nervous System.
(a) The cerebrum consists of two cerebral hemispheres.
(b) The spinal cord has spinal nerves attached to it.

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Q. CNS consists of the brain and the . PNS consists of the that emerge from and enter into the spinal cord and the brain.

Q. Name the following:

(i) Nervous system including brain and spinal cord.
(ii) Sympathetic and parasympathetic jointly forms.
(iii) Terminal end of spinal cord.
(iv) The third neurone that is involved in reflexes, other than simple reflex.
(v) Study of structure and functions of nervous system.
(vi) Nerve which carry impulse from sensory receptor to CNS.
(vii) The nerve which carry impulse from CNS to muscles.
(viii) The peripheral matter of spinal nerve.
(ix) The peripheral matter of the brain.
(x) Outermost meningial membrane of spinal cord.
(xi) Structural and metabolic unit of nervous tissue.
(xii) The biological term given to the protective membranes of the brain.
(xiii) Cavity in which brain is situated.
(xiv) The neobrain.
(xv) The important centre of emotion.
(xvi) Paired lobes of midbrain related to the vision.
(xvii) Paired lobes of the brain related to the sense of smell.
(xviii) Fissure between the cerebral hemispheres.
(xix) Inability to write.
(xx) The busiest organ of the body.
(xxi) Inability to speak.
(xxii) The longest cranial nerve.
(xxiii) Thoracolumber region of spinal cord form.
(xxiv) Highly branched axon's end.
(xxv) Neuron only with axon.
(xxvi) White part of the eye.
(xxvii) Short sightedness.
(xxviii) Part of internal ear related to balance.
(xxix) The photosensitive pigment present in the rod cells of the retina.

P is a cell (or group of cells) in the human body which is sensitive to a particular type of stimulus and conveys the message to CNS through nerves Q. On the other hand, R is part of the human body which can respond to a stimulus according to the instructions sent from the CNS through nerves S.

(a) What is P ? Name give organs which contain cells (or group of cells ) like P.

(b) Name the nerves Q.

(d) Name nerves S.

(e) How do messages travel through the nerves Q and S ?

Q. Which of the following statement(s) is/are true?
1. Somatic neural system transmit impulses from CNS to skeletal muscles.
2. Autonomic neural system transmits impulses from CNS to involuntary organs and smooth muscles.
3. Unmyelinated nerve fibres are found in spinal and cranial nerves
4. Myelinated nerve fibres are found in autonomous and the somatic neural systems.

Q. Nerves of CNS includes:

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What does CNS stand for? Which part of CNS: (a) consists of two cerebral hemispheres, and (b) has spinal nerves attached to it?

CNS stands for Central Nervous System. (a) The cerebrum consists of two cerebral hemispheres. (b) The spinal cord has spinal nerves attached to it.

CNS stands for Central Nervous System.
(a) The cerebrum consists of two cerebral hemispheres.
(b) The spinal cord has spinal nerves attached to it.