Ch. 3 SG - Nutrition - NutritionStudyGuide(Ch.3)

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Nutrition Study Guide (Ch. 3) Chapter Three – Digestion, Absorption, and Metabolism Role in Wellness Physical    maintaining body function depends on digestion and absorption of nutrients Intellectual    deciding and following through with lifestyle behavior changes to improve health  Emotional    emotional state and ability to handle stress may increase risk of GI tract disorders Social   negativity associated with body smells Spiritual    respecting the sanctity of the human body includes willingness to follow diet changes Digestion Gastrointestinal (GI) tract :  consists of the main organs of the digestive system that form a tube  from mouth to anus; also called alimentary canal Digestive System :  series of organs that prepare ingested nutrients for digestion and absorption Digestion :  process by which foods are broken down into smaller and smaller units to prepare  nutrients for absorption Process of ingestion, digestion, absorption, and elimination depend on the motility or movement of GI wall  and secretions of digestive juices and enzymes Mouth :  salivary glands secrete saliva 3 salivary glands (parotid glands, submandibular glands, and sublingual glands) Exocrine glands secrete chemicals into ducts that release into cavity or to surface of body Infants have lipase   goes away after year one Food in mouth stimulates chemical and mechanical digestion Chemical digestion :  chemical altering effects of digestive secretions, gastric juices, and enzymes  on food substance composition
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Nutrition Study Guide (Ch. 3) Mechanical digestion :  crushing and twisting effects of teeth and peristalsis dividing foods into 
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This note was uploaded on 02/13/2011 for the course NUR 00001 taught by Professor Abc during the Spring '11 term at Cornell University (Engineering School).

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Ch. 3 SG - Nutrition - NutritionStudyGuide(Ch.3)

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