Question

Increase in bleeding time and delay in blood coagulation is due to deficiency of which hormone?

• A. Adrenaline
• B. Noradrenaline
• C. Parathormone
• D. Thyroxin

Answer 1

The correct option is C

Parathormone

The correct option is (C).

Explanation for correct option:

1. Calcium ions play an important role in blood coagulation.
2. Since parathormone is responsible for the synthesis of Calcium ions in the blood.
3. Therefore, a deficiency of parathormone will cause a deficiency of calcium ions in the blood which would, in turn, affect bleeding and blood coagulation.

Explanation for incorrect options:

Option A:

1. It is secreted by the adrenal glands which are located on top of the kidneys.
2. Its functions include increased heart rate, blood pressure, and blood flow in the brain which helps to tackle the fight-fright response in the body.

Option B:

1. It is both a hormone and a neurotransmitter.
2. It also functions to help the body tackle emergency situations by increasing heart rate and blood flow.

Option D:

Secreted by the thyroid glands, its functions include digestion and brain growth.

Final answer:

Hence, an increase in bleeding time and delay in blood coagulation is due to a deficiency of parathormone.