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Explain the effect of the following on metabolic rate: thyroxine levels, eating, body surface area, muscular exercise, emotional stress, starvation.
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Ch. 24 Nutrition, Metabolism, and Energy Balance
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034
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TOC.tableOfContents
- Ch. 1 The Human Body: An Orientation24
- Ch. 2 Chemistry Comes Alive25
- Ch. 3 Cells: The Living Units21
- Ch. 4 Tissue: The Living Fabric20
- Ch. 5 The Integumentary System11
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System26
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue19
- Ch. 12 The Central Nervous System26
- Ch. 13 The Peripheral Nervous System and Reflex Activity32
- Ch. 14 The Autonomic Nervous System19
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System23
- Ch. 17 Blood25
- Ch. 18 The Cardiovascular System: The Heart24
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues14
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034Non è quello che usi tu?Cambia libro di testo
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Marieb, Hoehn 11th EditionCh. 24 Nutrition, Metabolism, and Energy BalanceProblema 26
Marieb, Hoehn 11th EditionCh. 24 Nutrition, Metabolism, and Energy BalanceProblema 26Capitolo 24, Problema 26
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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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.
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Percorso guidato
02:33
Vitamin A
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.
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4:48Introduction to Human Development
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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Percorso guidato
6:08Map of the Lesson on Cells of the Immune System
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