Question 43: Answer the following :
(a) Which hormone is responsible for the changes noticed in females at puberty?
(b) Dwarfism results due to deficiency of which hormone?
(c) Blood sugar level rises due to deficiency of which hormone?
(d) Iodine is necessary for the synthesis of which hormone?
Answer:
a) Oestrogen or Estrogen is responsible for the changes noticed in females at the stage of puberty. Women attain puberty at the age of 13. Estrogen is secreted by the ovarian follicle cells in the ovaries. This hormone leads to the growth and maturation of reproductive tract; and development of accessory sex characters.
b) Dwarfism results due to deficiency of Somatotrophic or Growth hormone which is secreted by anterior lobe of pituitary gland. Dwarfism shows the stoppage of growth of long bones of the body.
c) Blood sugar level rises due to deficiency of Insulin hormone. Insulin is secreted by the beta cells of islets of Langerhans by the rise in blood- sugar level. Deficiency of insulin causes diabetes mellitus.
d) Iodine is necessary for the synthesis of Thyroxine hormone. Due to deficiency of iodine can cause the swelling up of neck and goitre disease and causes the enlargement of thyroid gland.
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