Which one of the following statements about non insulin dependent diabetes mellitus (NIDDM) is NOT true-
**Core Concept**
Non-insulin dependent diabetes mellitus (NIDDM), also known as type 2 diabetes, is a metabolic disorder characterized by insulin resistance and impaired insulin secretion. It accounts for the majority of diabetes cases worldwide and is often associated with obesity, physical inactivity, and a diet high in sugar and saturated fats.
**Why the Correct Answer is Right**
Type 2 diabetes is a complex disorder involving multiple pathophysiological mechanisms. Insulin resistance, a hallmark of NIDDM, occurs when peripheral tissues such as skeletal muscle and adipose tissue become less responsive to insulin, leading to impaired glucose uptake. This is often accompanied by impaired insulin secretion from the pancreatic beta cells, which further exacerbates hyperglycemia. Additionally, genetic factors, including variants in genes involved in insulin signaling and pancreatic beta-cell function, contribute to the risk of developing NIDDM.
**Why Each Wrong Option is Incorrect**
**Option A:** NIDDM is often associated with obesity, physical inactivity, and a diet high in sugar and saturated fats, which is a true statement.
**Option B:** Insulin resistance is a key feature of NIDDM, making this statement true.
**Option C:** Impaired insulin secretion from the pancreatic beta cells is a characteristic of NIDDM, so this statement is also true.
**Option D:** NIDDM is often associated with hyperinsulinemia, not hypoinulinemia, which is incorrect.
**Clinical Pearl / High-Yield Fact**
It is essential to recognize that NIDDM is a heterogeneous disorder with multiple underlying mechanisms, and a comprehensive approach to diagnosis and management is crucial. This includes lifestyle modifications such as diet and exercise, as well as pharmacological interventions to improve insulin sensitivity and secretion.
**Correct Answer:** D.