About This Chapter
Nutrition & the Digestive System - Chapter Summary
In this chapter on nutrition and the digestive system, self-paced lessons cover subjects like the pancreas, liver, and gallbladder. By studying the lessons, you will also learn why diarrhea and nausea occur. After completing the chapter, you should be poised to do the following:
- Discuss macronutrients and recommendations for energy intake
- Describe what happens to food in the upper gastrointestinal tract
- Recall functions of the lower gastrointestinal tract
- List chemicals produced in accessory organs of the digestive system
- Explain how the autonomic nervous system controls digestion
- List general motility disorders
- Discuss the impact of eating too much or not enough protein
Each video is accompanied by a full written transcript, which can be used for a text-based learning option. If you find yourself struggling with a topic, you can submit questions to instructors. A short quiz is available for each lesson to test your understanding of nutrition and the digestive system.
1. Calories: Definition, Purpose & Total Count
Learn about calories, their definition, purpose, and the total count of calories that a human body needs for energy balance. Review the Acceptable Macronutrient Distribution Ranges to achieve optimal nutrition through macronutrient goals.
2. Digestive System I: The Upper Gastrointestinal Tract
The first stages of the digestive process take place throughout the upper gastrointestinal tract. Review the process of how food moves through the upper gastrointestinal tract, including the mouth, the throat, and the stomach.
3. Digestive System II: The Lower Gastrointestinal Tract
The digestive process occurs primarily in the small intestine. This lesson details the function of each section of the lower gastrointestinal tract, including digestion and water absorption.
4. Accessory Organs of the Digestive System
Accessory organs of the digestive system help with the chemical digestion of food and include the pancreas, liver, and gallbladder. Explore the accessory organs, chemical digestion, and the breakdown of fat.
5. Anatomy and Physiology of the Stomach and Autonomic Nervous System Controls
Digestion begins in the mouth but continues in the stomach. Explore the anatomy and physiology of the stomach, like the pyloric sphincter, rugae, mucosa, and gastric pits and glands, and learn how the automatic nervous system controls them.
6. General Motility Disorders: Diarrhea and Constipation
General motility disorders are characterized by digestive problems such as diarrhea or constipation. Gain an understanding of the different types of diarrhea such as osmotic and secretory, common causes of diarrhea and constipation, and potential treatments for each disorder.
7. Health Effects Associated with Proteins
Protein-energy malnutrition is a form of malnutrition brought on by an insufficient intake of protein. Learn more about the health effects associated with proteins, understand what PEM is and the risks of a high protein diet.
8. General Motility Disorders: Nausea and Vomiting
Nausea and vomiting can be the result of common issues like overeating or drinking, but can also be linked to more serious internal issues. Learn more about general gastric disorders, how they occur, and treatments.
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