Evolve Diabetes Practice Test

Understanding how insulin works over time is the key idea here. Short-acting insulin, also known as regular insulin, starts to work about 30 to 60 minutes after you inject it, peaks around 2 to 4 hours, and lasts roughly 5 to 8 hours. This makes it useful for covering meal-related glucose rises, since its action is timed to when you’re eating. Other types have different patterns: long-acting insulins provide steady, baseline coverage with little to no pronounced peak and last about a day or more; intermediate-acting insulins have a noticeable peak and longer duration; ultra-long-acting insulins extend even longer with a flatter profile. So the insulin described as short-acting is the one with the earlier onset, a distinct but modest peak, and a shorter overall duration, matching regular insulin’s profile.