Which disease is due to lack of Iron element ?

Question

Accepted Answer

The correct option is 1:

Anaemia is indeed the correct answer, as it is the classic disease state resulting from a deficiency of the Iron element. To understand this connection, students must first recall the primary biological function of iron. Iron is a vital mineral component of *haemoglobin*, the protein contained within red blood cells. Haemoglobin's essential job is to bind with oxygen in the lungs and transport it efficiently to every cell and tissue throughout the entire body. When an individual suffers from insufficient iron intake or excessive iron loss, the body cannot synthesize adequate amounts of haemoglobin. Consequently, the red blood cells produced are smaller (microcytic) and paler (hypochromic), and their total number decreases. This condition, known as Iron Deficiency Anaemia (IDA), severely compromises the blood's oxygen-carrying capacity. The resulting lack of oxygen delivery to tissues manifests as common symptoms like extreme fatigue, weakness, pallor (unhealthy paleness), and shortness of breath, directly linking the deficiency of the Iron element to the development of anaemia.

The incorrect option is 2:

Night blindness is a condition that affects a person’s ability to see in dimly lit environments, but it is not caused by a lack of iron. This disease, known scientifically as *Nyctalopia*, is a primary symptom of a severe deficiency in **Vitamin A**. Vitamin A is absolutely necessary for the synthesis of rhodopsin, the light-sensitive pigment found in the rod cells of the retina, which are responsible for low-light and peripheral vision. Without sufficient Vitamin A to regenerate rhodopsin after exposure to bright light, the eyes lose the capacity to adapt quickly to the dark. Although iron is crucial for overall health, it plays no direct part in this specific photochemical process of vision, making the deficiency of this mineral irrelevant to the cause of night blindness.

The incorrect option is 3:

Scurvy is an illness that arises from a profound and prolonged deficiency of **Vitamin C** (ascorbic acid). This vitamin plays a critical role in the human body, particularly as a co-factor for enzymes involved in the synthesis of *collagen*, the most abundant structural protein in the body. Collagen is fundamental for building and repairing connective tissues, skin, bones, and blood vessel walls. A deficiency prevents the body from forming strong collagen, which leads to the characteristic symptoms of scurvy, such as gum inflammation and bleeding, easy bruising, poor wound healing, and severe joint pain. Therefore, scurvy is categorized as a hypovitaminosis due to a lack of Vitamin C, entirely separate from the functions and deficiency of the iron element.

The incorrect option is 4:

Osteoporosis is a systemic skeletal disease defined by low bone mass and micro-architectural deterioration of bone tissue, which consequently increases bone fragility and the risk of fracture. This condition is primarily associated with deficiencies in **Calcium** and **Vitamin D**. Calcium is the main mineral component that gives bones their hardness and structure, and Vitamin D is essential for regulating the body's calcium and phosphate levels and promoting the intestinal absorption of calcium. While maintaining healthy blood is important, iron is not a major structural component of the bone matrix, nor does its deficiency directly cause the loss of bone mineral density. The disease is related to mineral and vitamin metabolism crucial for skeletal health, not the essential oxygen transport function of iron.