Lecture 3- Chewing

Lecture 3- Chewing - during waking hours o Having sex =...

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Lecture 3: Chewing  18/12/2009 14:48:00 People can be considered a donut Food goes through the mouth and gets excreted in waste (in and out) Viruses, bacteria, prions can enter the body Cephalic System Parasympathetic  Salivary Glands o Function:  (a) lubricate  (b) antibacterial (c) begins digestion  lipase –breaks triglycerides into fatty acids + glycerol  amylase –breaks starches into simple sugars  Nursing Bottle Syndrome o Prolonged sucking on an object o Causes front teeth to decay o Sleep suppress salivary flow Mastication o Breaks particles in smaller pieces.  o Increases surface area  o Plants cover nutrients with cellulose and other fibers  o Elderly  a. Poor teeth = major cause of poor nutrition  Theory of Mastication o States that chewing gum helps you lose weight
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Energy expenditure o True, however, amount of calories lost is very small (14 per hour only 
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Unformatted text preview: during waking hours o Having sex = more energy expenditure (calories lost) than chewing gum o Not clinically significant • Taste o Sugar (sweetness is most responsive) o Ideas about sweetness SUGAR IS LIKE HEROIN Dr. Elliot Blass, Dr. Bart Hoebel -Found sugar has to have a sedating effect in crying baby rats and baby humans -Effect in rats can be blocked by opiate antagonists -Suggests opioid release during feeding may be one basis for bonding Sugar is a Surrogate for calories Tricking Mother Nature? – Artificial Sweeteners Saccharin • Cancer Aspartame • Phenylalanine + Aspartic Acid • Methanol Acesulfame Sucralose Xylitol (sugar alcohol) ← 18/12/2009 14:48:00 ← 18/12/2009 14:48:00 ←...
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