Insulin having longest duration of action is:
**Question:** Insulin having longest duration of action is:
A. Insulin Aspart
B. Insulin Glargine
C. Insulin Detemir
D. Insulin Glulisine
**Core Concept:**
Insulin is a hormone produced by the beta cells of the pancreas that plays a crucial role in regulating glucose homeostasis by facilitating glucose uptake into cells. Different types of insulin are available with varying duration of action, which determines how long the insulin remains effective in lowering blood glucose levels after administration.
**Why the Correct Answer is Right:**
Insulin Glargine (B) is known for its long duration of action due to its unique structure. It is a basal insulin analog that has a slow absorption rate and a long duration of action. This allows for a more consistent lowering of blood glucose levels throughout the day, making it suitable for treating type 1 and type 2 diabetes mellitus.
**Why Each Wrong Option is Incorrect:**
A. Insulin Aspart (A) is a rapid-acting insulin analog designed for immediate and short-acting glucose lowering. It has a shorter duration of action compared to insulin glargine.
C. Insulin Detemir (C) is a long-acting insulin analog that is absorbed more slowly than regular insulin. However, its duration of action is shorter than insulin glargine.
D. Insulin Glulisine (D) is a rapid-acting insulin analog that is absorbed quickly and provides a rapid decrease in blood glucose levels. It has a much shorter duration of action compared to insulin glargine.
**Clinical Pearl:**
Insulin Glargine (B) is commonly used for basal insulin therapy in patients with diabetes mellitus, offering a more consistent glucose-lowering effect throughout the day. It helps to reduce the risk of hypoglycemia and is particularly beneficial for those needing basal insulin replacement for type 1 diabetes.