Question

Which of the following hormones is produced underthe condition of stress which stimulates glycogenolysis in the liver of human beings?

• A. Insulin
• B. Adrenaline
• C. Estradio
• D. Thyroxin

Answer 1

The Correct Option is B

The question revolves around understanding which hormone is secreted under stress conditions and which stimulates glycogenolysis in the liver. Let's examine each option given:

1. Insulin: This hormone is primarily involved in lowering blood glucose levels by facilitating the uptake of glucose into cells and promoting glycogen synthesis rather than glycogenolysis.
2. Adrenaline: Also known as epinephrine, this hormone is secreted by the adrenal glands, particularly under stress conditions. It plays a pivotal role in the 'fight or flight' response by increasing heart rate, dilating air passages, and, importantly, stimulating glycogenolysis in the liver. Glycogenolysis is the process of breaking down glycogen into glucose, thus increasing blood glucose levels to provide immediate energy.
3. Estradiol: This is a form of estrogen, a sex hormone involved in the regulation of the reproductive and menstrual cycle. It is not related to glycogenolysis or stress response.
4. Thyroxin: This hormone, secreted by the thyroid gland, plays a role in metabolism and growth but is not directly involved in glycogenolysis during stress.

Based on the explanation above, Adrenaline is the correct answer. It is the hormone responsible for stimulating glycogenolysis in the liver under stress conditions, thereby increasing the glucose level in the blood, which is crucial for providing immediate energy to the body.

Thus, the correct answer is Adrenaline.