Question

Identify the set of hormones that are not antagonistic in function.
A. Melanocyte stimulating hormone (MSH) – Melatonin
B. Calcitonin – Parathyroid
C. Adrenalin – Noradrenalin
D. Insulin - Glucagon

Answer 1

Hint: The word antagonist means opposite and antagonistic hormones are the one which has opposite action on the body. For example, if one hormone increases the blood sugar level-so that the other one regulates the blood sugar level by storing glucose in some tissues.

Step by step answer:The anterior lobe of the pituitary gland secretes melanocyte-stimulating hormone. Its function is to stimulate the melanocyte and production of melanin in the skin and hair. Melatonin is released by the pineal gland and is associated with the sleep cycle. Calcitonin and parathyroid hormone regulate the calcium concentration level in blood. Blood calcium level increases because of absorption and reabsorption of calcium in the intestine and kidneys by stimulating the production of calcium from bones. This is regulated by the parathyroid hormone. Calcitonin hormone is responsible for inhibiting the production of calcium by bones. The increased concentration of blood glucose level stimulates the beta cells to produce insulin and opposite to it when blood glucose level drops it stimulates the alpha cell to secrete glucagon. The body’s fight and flight response are triggered by hormone adrenaline. It causes air passage to dilate and provide oxygen to the muscle required and provide more strength. An increase in adrenaline makes a person more aware even during stressful situations. Noradrenaline is responsible for increased heart rate, widening of the pupil, and an increase in blood pressure. So, adrenaline and noradrenaline are not antagonistic in function.
Hence option C is the right answer.

Note: The antagonistic hormones are responsible for maintaining homeostasis of the body. Homeostasis can be defined as the ability of a body to maintain a steady, stable internal, physical, and chemical state despite changes in the external environment.