Q1 of 102 Page 130

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

Myopia and hyperopia (Cause of the defect)











Myopia



Hyperopia



Myopia is the result of the eye ball being lengthened from front to back or the lens is too curved.



Hyperopia is the result of either the shortening of the eyeball from front to back or when the lens is too flat.




More from this chapter

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2

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

(a) Cones: Iodopsin:: Rods: ………….


(b) Sound: Eardrum :: Dynamic balance : …………………..

 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.

Rods and cones (Sensitivity)

 1

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

Semi-circular canal and cochlea (Function)