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Given below is an incomplete table about certain hormones, their source glands and one major effect of each on the body in humans. Identify the correct option for the three blanks A, B and C.
A
A – Placenta, B – Glucagon, C – Calcitonin
B
A – Ovary, B – Glucagon, C – Growth hormone
C
A – Placenta, B – Insulin, C – Vasopressin
D
A – Ovary, B – Insulin, C – Calcitonin
Detailed Solution
A: oestrogen that maintains the female secondary sexual characters is secreted by the growing follicles of the ovary, so A is the ovary.
B: the alpha cells of the islets of Langerhans secrete glucagon, which stimulates glycogenolysis and gluconeogenesis and so raises the blood sugar level (hyperglycemic hormone). Insulin is secreted by the beta cells and lowers blood sugar. So B is glucagon.
C: the anterior pituitary secretes growth hormone; its over-secretion stimulates abnormal growth of the body leading to gigantism. Calcitonin is from the thyroid and vasopressin is released from the posterior pituitary. So C is growth hormone.
Hence A is ovary, B is glucagon and C is growth hormone.
B: the alpha cells of the islets of Langerhans secrete glucagon, which stimulates glycogenolysis and gluconeogenesis and so raises the blood sugar level (hyperglycemic hormone). Insulin is secreted by the beta cells and lowers blood sugar. So B is glucagon.
C: the anterior pituitary secretes growth hormone; its over-secretion stimulates abnormal growth of the body leading to gigantism. Calcitonin is from the thyroid and vasopressin is released from the posterior pituitary. So C is growth hormone.
Hence A is ovary, B is glucagon and C is growth hormone.