51. Nervous system is affected by the shortage of:
(a) Oxygen
(b) Sulphur
(c) Carbon
(d) Sodium
52. The heart is covered by a membrane called:
(a) Epidermis
(b) Pericardium
(c) Dermis
(d) Epicardium
53. Heart attack occurs due to:
(a) Bacterial attack on the heart
(b) Lack of blood supply to the heart itself
(c) Stopping of heart
(d) None of these
54. Allergy is caused due to:
(a) Inflammation of upper respiratory tract
(b) Antigen-antibody reaction
(c) Introduction of external material into
(d) None of these
55. The weight of an average human male brain is about:
(a) 1 kg
(b) 1200 g
(c) 1350 g
(d) 1500 g
56. Element that is not found in blood is:
(a) Iron
(b) Chromium
(c) Copper
(d) Magnesium
57. The image formed on the retina of the eye is:
(a) Real and upright
(b) Real and inverted
(c) Virtual and upright
(d) Real and enlarged
58. The first organ to be transplanted was:
(a) Kidney
(b) Heart
(c) Lungs
(d) Liver
59. The amount of light entering the eye is regulated by:
(a) Cornea
(b) Iris
(c) Pupil
(d) None of these
60. Bile juice is secreted by:
(a) Pancreas
(b) Liver
(c) Spleen
(d) Gall bladder