A bolus insulin does it means some rapid mixed with a lente one?

No, a bolus insulin is not a mixture of rapid and lente insulins. Bolus insulin refers to a type of insulin that is taken before a meal to help control blood sugar levels after eating. It is usually a rapid-acting insulin, which means it starts working within 15-30 minutes and peaks in about an hour. Lente insulin, on the other hand, is an intermediate-acting insulin that starts working within 1-2 hours and peaks in about 4-12 hours. Therefore, bolus insulin is not a mixture of rapid and lente insulins, but rather a rapid-acting insulin taken before meals to manage blood glucose levels.