Adrenaline is released by which gland in the human body?

• A. Pancreas
• B. Pituitary gland
• C. Thyroid gland
• D. Adrenal gland

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the role of adrenaline in the human body. Adrenaline, also known as epinephrine, is a hormone that plays a key role in the 'fight or flight' response, helping the body respond to stress by increasing heart rate, blood flow, and energy availability.
2. Step 2: Identify the gland responsible for producing adrenaline. The adrenal glands are small, triangular-shaped glands located on top of each kidney. They consist of two parts: the adrenal cortex (outer layer) and the adrenal medulla (inner layer). The adrenal medulla is specifically responsible for secreting adrenaline.
3. Step 3: Compare the options provided in the question. The pancreas is involved in regulating blood sugar levels through insulin and glucagon. The pituitary gland is known as the 'master gland' and controls various other glands but does not produce adrenaline. The thyroid gland regulates metabolism but is not involved in adrenaline production.
4. Step 4: Confirm that the adrenal gland is the correct answer based on its function and location in the body. The adrenal gland is the only gland among the options that produces adrenaline.
5. Step 5: Conclude that the adrenal gland is the correct answer and explain why the other options are incorrect based on their functions in the human body.