Q1 of 102 Page 130

Differentiate between members of each of the following pairs with reference to what is asked in brackets.

Rods and cones (Sensitivity)











Rods



Cones



Rods are sensitive to dim light but do not respond to colour.



cones are sensitive to bright light and are responsible for colour vision.




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3

Which one or more of the expressions in column II are appropriate for the items listed in column I? Write the correct matching pairs







































Column I



Column II



(i) The blind spot



(a) Colour of the eye



(ii) The yellow spot



(b) Shape of the lens



(iii) Ciliary muscle



(c) Protective covering of the brain



(iv) Iris



(d) Basic unit of brain



(v) Meninges



(e) free of rod cells




(f) vitreous humour




(g) centre of the retina




(h) no sensory cells



Correct matching


(i) : ……………….. …………………


(ii) : ………………. ………………..


(iii) : ………………… ……………….


(iv) : ………………. …………………..


(v) : ………………….. ………………….

 1

Differentiate between members of each of the following pairs with reference to what is asked in brackets.

Myopia and hyperopia (Cause of the defect)

 1

Differentiate between members of each of the following pairs with reference to what is asked in brackets.

Semi-circular canal and cochlea (Function)

 1

Differentiate between members of each of the following pairs with reference to what is asked in brackets.

Rod and cone cells (Pigment contained).