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9 Cards in this Set
- Front
- Back
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What modifcations have been made to the FDA's food pyramid?
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Added exercise
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Besdies fat, what macromolecule do most Americans take in way too much of?
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Sugar
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What are antioxidants?
How do they function? |
C,E,beta-carotene
inactivate oxygen free radicals protect against aging, cancer, plaque and cataracts |
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What are the 4 main functions of the digestive system?
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1- glucose stored as glycogen
2- gluconeogensis 3- triglycerides broken into glycerol and fatty acids 4- lipids transported in blood as lipoprotein |
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What are the 6 steps involved with these functions?
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1- ingestion
2- secretion 3- mixing and propulsion 4- digestion 5- absorption 6- defecation |
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What are the 4 main layers of the GI tract?
What is each layers function? |
mucosal - absorption, nutrients, mucus
submucosal - vasoconstriction muscularis - swallowing, defecation, peristalisis serosa - covers organs and cavities |
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Describe chemical and mechanical digestion of the mouth.
What is food called when it iis mixed with saliva? |
mastication + bolus - mechanical
amylase + lingual lipase - chemical |
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Describe the movement of a bolus from your mouth to your stomach.
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swallowing is facilitated by saliva and mucus
bolus pushed into oropharynx soft palate lifts to close nasopharynx larynx lifts and epigottis closes glottis goes down esophagus lower esophageal sphincter stomach |
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Describe the mucosa and gastric glands of the stomach.
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mucosa folds into rugae
mucus-mucus chief- pepsinogen parietal cells - HCl Gcells - gastric juice motility |
