10. Pathological changes due to vitamin-A deficency in mammals

Question 1

need for vitamin a

Answer 1

vision
steroid- synthesis
normal development of epithelium

Question 2

lesions due to congenital hypovitaminosis

Answer 2

metaplasia in different epithelial tissues
dysfunction
hyperkeratosis of covering epithelium
hyperkeratosis of rumen
disturbance of skeletal development

Question 3

consequence of abnormal development of cranial bone

Answer 3

shallow orbita -
exophthalmus
exsiccation of cornea
metaplasia
decreased tear production

Question 4

clinical signs of hypovitaminosis

Answer 4

keratinisation of ep tissues
mm metaplasia
hyperkeratossi (can cause infection)

Question 5

lesions of salivary glands due to vit a hypovitaminosis

Answer 5

inflammation
metaplasia in ducts

Question 6

lesions of eye lesions due to vit a hypovitaminosis

Answer 6

night blindness

Question 7

another name for night blindness

Answer 7

xerophtalmia

Question 8

lesions of forestomachs due to vit a hypovitaminosis

Answer 8

hyper & para keratosis

Question 9

lesions of skin due to vit a hypovitaminosis

Answer 9

hyper & para keratosis
hair follicle degeneration