Question

Which of the following is first aid hormone?
A. Vitamin D
B. Catecholamines
C. Kinins
D. Thymosin

Answer 1

Hint: An emergency care given to the injured person known as First aid. The main purpose of first aid is to minimize the injury.

Complete answer:
A. Vitamin D- Its main function is to absorb calcium and help build bones and keep them strong and healthy and it is also essential to keep teeth healthy, or protect from diseases. It also helps in the regulation of calcium and phosphorus levels in the blood.
B. Catecholamines- They are neurohormone (a hormone prepared by nerve cells and then used to send signals to other cells). It mainly helps the body to respond to stress and it prepares the body for fight or flight reactions. Adrenal glands prepare large amounts of catecholamines as a reaction to stress.
C. Kinins- Kinins are the proteins present in the blood. These hormones are released to overcome the changes occurring in the tissue. Kinins cause inflammation and it affects the body's blood pressure (mainly low blood pressure). Kinins help in vasodilation and also increase the blood supply to the affected area and cause mild pain. Therefore, they act as a first-aid of the body that is why they are known as first aid hormones.
D. Thymosin- Thymosin is a hormone produced from the thymus and helps in the stimulation of T-cells, which are a vital part of the body's immune system. Thymosin also aids in the development of B-cells to plasma cells to produce antibodies.

Hence, the correct answer is option (C).

Note: Whenever there is a poisonous insect is stinging, burning, or any internal injury so the sensation of pain during that time is caused due to the Kinins. These Kinins are not synthesized by the cells or released by the cells but they are bioactive, short, and potent peptides that make up a small portion of a large protein.