Q2 of 44 Page 32

A list of disorders are given below. Pick out the odd one out and give reasons.

(Thalassemia, haemophilia, night blindness, albinism, sickle cell anaemia)


Night blindness


Night blindness is a symptom of a disease called Nyctalopia. This disease occurs due to the deficiency of vitamin A. A person who is suffering from this disease is unable to see things in the night. Thalassemia, haemophilia, albinism, and sickle cell anaemia are genetic disorders.


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12

Assertion (A) Expulsion of excess unused glucose in the blood through urine is observed in a diabetic mellitus person.

Reason (R): insulin is not produced in sufficient quantity by pancreas.


 1

Marasmus and Kwashiorkar are both protein deficiency defects. Marasmus differs from Kwashiorkar in enlarged belly and swelling in the face. Are these symptoms for the above diseases correct? If not, correct it.

 3

What are the symptoms of common cold?

i) ____________________


ii) ____________________


 4

Differentiate between the diseases-night blindness and colour blindness.