While attempting to sail solo from Los Angeles to Tahiti, Seth encountered a storm that marooned him on an uninhabited island. He was able, using his ingenuity and a pocket knife, to obtain plenty of fish to eat, and roots were plentiful. However, the island was barren of fruits and soon his gums began to bleed and he started to develop several infections. Analyze his problem.

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Identify the symptoms Seth is experiencing: bleeding gums and multiple infections. These are classic signs of a deficiency in a specific nutrient.

Recall that bleeding gums and poor wound healing are commonly associated with a deficiency in vitamin C (ascorbic acid), which is essential for collagen synthesis and immune function.

Understand that vitamin C is primarily obtained from fruits and vegetables, which Seth lacks on the island since it is barren of fruits.

Recognize that without adequate vitamin C, collagen production is impaired, leading to weakened blood vessel walls (causing bleeding gums) and compromised immune defense (leading to infections).

Conclude that Seth's problem is scurvy, a disease caused by vitamin C deficiency, and that his diet of fish and roots alone does not provide sufficient vitamin C to prevent this condition.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Vitamin C Deficiency and Scurvy

Vitamin C is essential for collagen synthesis and immune function. A lack of vitamin C, often due to absence of fruits and fresh vegetables, leads to scurvy, characterized by bleeding gums, weakness, and infections. Seth’s symptoms suggest scurvy caused by insufficient vitamin C intake on the barren island.

Nutritional Requirements for Human Survival

Humans require a balanced intake of macronutrients and micronutrients, including vitamins and minerals, to maintain health. While fish and roots provide protein and carbohydrates, the absence of fruits means missing vital vitamins like vitamin C, leading to deficiency diseases despite adequate caloric intake.

Role of Collagen and Immune System in Healing

Collagen is a structural protein crucial for tissue repair and gum health, dependent on vitamin C for synthesis. Without enough vitamin C, collagen production falters, weakening gums and skin, and impairing immune response, which increases susceptibility to infections, explaining Seth’s deteriorating condition.

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