Question

Which combination of hormones helps a mother to produce milk and nurse her baby? A. Prolactin and calcitrone. B. Oxytocin and prolactin. C. Follicle stimulating hormone and luteinizing hormone D. Luteinizing hormone and oxytocin. E. Oxytocin, prolactin and luteinizing hormone. Which of the following have nontropic effects only? A. FSH B. LH C. MSH D. ACTH E. TSH All of the following are steroid hormones except A. Androgen. B. Cortisol. c. Estrogen. D. Testosterone. E. Insulin Which of the following endocrine structures are derived from nervous tissue? A. Thymus and thyroid glands B. Ovaries and the testis C. Liver and the pancreas D. Anterior pituitary and the adrenal cortex E. Posterior pituitary and the adrenal medulla. What happens when beta cells of the pancreas release insulin into the blood? A. Blood glucose levels rise to a set point and stimulate glucagon release. B. Body cells take up more glucose C. The liver breaks down glycogen to glucose. D. Alpha cells are stimulated to release glucose into the blood. E. Both B and D are correct. Blood samples taken from an individual who had been fasting for 24 hours which of the following? A. High levels insulin. B. High levels of glucagon. C. Low levels of insulin. D. Low levels of glucagon. E. Both B and C

Answer 1

Answer 5. B) Oxytocin and prolactin

Justification: Prolactin is a hormone which triggers the production of the milk while oxytocin is released as the baby starts feeding the breast and facilitates milk ejection.

Answer 6. C) MSH

Hormones that directly stimulate target cells to induce effects are called as Non-tropic hormones while hormones which act on other endocrine glands are called as tropic hormones. FSH, LH, ACTH and TSH are secreted from anterior pituitary and stimulate respective glands. In contrast, melanocyte-stimulating hormone (MSH) directly stimulated the keratinocytes (skin cells) to secrete melanin; skin color pigment.

Answer 7. E) Insulin

Among the given answers, Insulin is a protein molecule that acts as a hormone. Remaining all options are examples of steroids.

Answer 8. E)

In general, endocrine system and associated glands are derived from endoderm layer. Posterior pituitary and the adrenal medulla are the two endocrine structures that are derived from nervous tissue.

Answer 9. B)

High insulin levels in blood causes higher uptake of glucose by skeletal muscles and adipose cells.

Answer 10. B)

During starvation, blood glucose level tends to decrease which stimulates the high release of glucagon enzyme in blood. High glucagon will break down fat molecules and increase concentration of glucose in the blood.