Q1 of 102 Page 118

The insulating sheath covering the neural axon is called

Neurolemma is the outermost nucleated cytoplasmic layer of Schwann cells that surrounds the axon of the neuron. It serves a protective function for peripheral nerve fibers.

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2

Given below are a few common reflexes in humans. Write against each the kind of reflex it is (simple or conditioned).

(i) Knee-jerk ___________


(ii) Watering of mouth on seeing a favourite dish ___________


(iii) Tying of shoelaces while talking ___________


(iv) The closing of eyelids if a strong beam of light is flashed across ___________

 3

Given alongside is a partial diagrammatic representation of a certain phenomenon pertaining to the nervous system.


(i) Name the parts numbered 1-7


(ii) What phenomenon does the diagram represent? ____________


(iii) Name the parts not shown in the diagram that should be included to complete the pathway of the phenomenon. ______________

 2

Which one of the following pairs of brain part and its function is not correctly matched?

 3

A mixed nerve is one which