BioMedical Admissions Test (BMAT) 2025 – 400 Free Practice Questions to Pass the Exam

Insulin plays a critical role in regulating blood glucose levels in the body. When you consume food, particularly carbohydrates, your blood glucose levels rise. In response, the pancreas secretes insulin, a hormone that facilitates the uptake of glucose into the body's cells, where it is used for energy or stored for future use. This process effectively reduces the concentration of glucose in the bloodstream, preventing hyperglycemia (elevated blood sugar levels).

Insulin also promotes the storage of excess glucose in the liver in the form of glycogen and helps inhibit the production of glucose by the liver. Thus, the primary function of insulin is to lower blood glucose levels, making option B the correct answer.

Other options describe different functions or systems that insulin does not directly influence. For instance, option A states that insulin increases blood glucose levels, which is inaccurate as insulin's primary action is to decrease glucose levels. The role of insulin does not pertain to affecting ion balance in the blood, as stated in option C, nor does it directly stimulate kidney function, as mentioned in option D.