Q1 of 102 Page 118

Mention, wherein the human body are the following located and state their main functions:

(a) Corpus callosum


(b) Central canal

(a) Location: Corpus callosum is a part of the Forebrain.


Function: It connects the two cerebral hemispheres and transmits information from one hemisphere to another.


(b) Location: The central canal is located in the center of the spinal cord and is also in continuation with the cavities of the brain.


Function: The cerebrospinal fluid present in the central canal acts as a shockproof cushion. The central canal also helps in the transfer of materials between neurons.


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2

Note the relationship between the first two words and suggest the suitable word/words for the fourth place.

(a) Stimulus : Receptor :: Impulse : .......


(b) Cerebrum : Diencephalon :: Cerebellum : ................


(c) Receptor : Sensory nerve :: Motor nerve : .............

 3

Complete the following statements by choosing the correct alternative from the choices given in brackets:

(a) The dorsal root ganglion of the spinal cord contains cell bodies (motor/sensory/intermediate) neurons.


(b) Cerebellum is the part of the brain which is responsible for


(i) conducting reflexes in the body


(ii) maintaining posture and equilibrium


(iii) controlling thinking, memory & reasoning


(c) Reflex action is controlled by


(i) brain


(ii) spinal cord


(iii) autonomic


(iv) peripheral nervous system.

 2

State whether the following statements are true (T) or false (F).

(a) The main component of the white matter of the brain is perikaryon. (T/F)


(b) The arachnoid layer fits closely inside the pia mater. (T/F)


(c) A double chain of ganglia, one on each side of the nerve cord belongs to the spinal cord. (T/F)


(d) Dura mater is the outermost layer of the meninges. (T/F)

3

Differentiate between following pairs with reference to the aspect in brackets.

Cerebrum and cerebellum (function).