Which hormone is responsible for instructing cells to take in glucose from the blood?

• A. Cortisol
• B. Insulin
• C. Adrenaline
• D. Glucagon

Answer: (B)

Verified step by step guidance

1. Begin by identifying the primary function of each hormone listed in the problem. Understanding their roles will help determine which one is responsible for glucose uptake.
2. Cortisol is a hormone released by the adrenal glands in response to stress. It primarily increases blood glucose levels by promoting gluconeogenesis and the breakdown of proteins and fats.
3. Adrenaline, also known as epinephrine, is another hormone produced by the adrenal glands. It prepares the body for 'fight or flight' responses, increasing heart rate and blood glucose levels by stimulating glycogen breakdown.
4. Glucagon is a hormone produced by the alpha cells of the pancreas. Its main role is to increase blood glucose levels by promoting glycogen breakdown and gluconeogenesis in the liver.
5. Insulin is a hormone produced by the beta cells of the pancreas. Its primary function is to lower blood glucose levels by facilitating the uptake of glucose into cells, particularly muscle and fat cells. This is the hormone responsible for instructing cells to take in glucose from the blood.