Scurvy is characterized by bleeding gums and is caused by the deficiency of:
A. Vitamin B12
B. Vitamin A
C. Vitamin D
D. Vitamin C
Answer: Option D
Solution (By JKSSB Mock Tests)
Scurvy is caused by a deficiency of Vitamin C (Ascorbic acid). Vitamin C is essential for the synthesis of collagen, a structural protein in connective tissues. Its deficiency leads to weakened blood vessels, causing symptoms like bleeding gums, loose teeth, joint pain, and poor wound healing. It was historically common among sailors lacking fresh fruits and vegetables.
Explanation:
Skeletal muscle, attached to bones, is striated and under conscious (voluntary) control. Smooth and cardiac muscles are involuntary. Skeletal muscles are responsible for locomotion and posture.
Explanation:
Ovulation is the rupture of the mature Graafian follicle and release of a secondary oocyte from the ovary, typically around day 14 of a 28-day menstrual cycle, triggered by LH surge. Menstruation is the shedding of uterine lining. Fertilization is fusion of sperm and ovum, implantation is embedding of blastocyst in the endometrium.
Explanation:
Natural passive immunity is transferred from mother to child via placental transfer of IgG antibodies (in utero) and IgA antibodies in breast milk (colostrum). It provides temporary protection without the infant's immune system being activated. Active immunity results from natural infection or vaccination.
No comments yet. Be the first to start the discussion!