A primary characteristic of hypothyroidism is:

A primary characteristic of hypothyroidism is:

• A. Fast metabolism
• B. Heightened alertness
• C. Weight gain
• D. Frequent headaches

Answer: (C)

Hypothyroidism is a condition where the thyroid gland does not produce enough thyroid hormones, which play a crucial role in regulating the body's metabolism. One of the primary characteristics of hypothyroidism is indeed weight gain. This occurs because the slowed metabolic rate leads to a decreased ability to burn calories, resulting in weight accumulation.

Individuals with hypothyroidism may also experience other symptoms such as fatigue, cold intolerance, and depression, among others. The condition can disrupt normal bodily functions, leading to changes that often manifest in significant weight gain rather than weight loss or increased energy levels associated with a hyperactive metabolic state. This understanding of how thyroid hormone levels directly influence metabolism clarifies why weight gain is a hallmark of hypothyroidism.