Bild 2 Midterm 2 Review

Bild 2 Midterm 2 Review - Bild2Final Review 22:29...

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Bild 2 Final  Review 22:29 Essential Nutrients Essential amino acids Essential fatty acids Vitamins Minerals Essential amino acids 20 to make protein require 8 in diet if not enough o protein deficiency complete proteins o provide all essential amino acids in their proper proportions-meat, eggs  and cheese incomplete proteins o deficient in one or more essential amino acids-plant  Essential fatty acids unsaturated Vitamins 13 essential vitamins water soluble  fat solutble
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Minerals Inorgantic nutrients o Zinc o Potassium Calcium necessary for functioning of nerves and muscles Phosphorus is an ingredient of ATP and nucleic acids. Large amounts can cause toxic side effects Dietary deficiencies Undernourishment o Body uses up stored fat and carbohydrates o Beigns breakind won its own proteins for fuel o Muscles beign to decrease in size o Brain may become protein-deficient Malnourishmentdeforrmities Disease Death Digestion 4 process o ingestion o digestion o absorption
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o elimination Feeding Mechanisms o Suspension feeders Aquatic animals Sift small food particles from water o substrate feeders live in or on their fod source o fluid feeders such nutrient-rich fluid from living host o bulk feeders eat large pieces of food. Hydra provdes a good example of how a gastrovascular cavity works Uses its tentacles to stuff captured pretty through its mouth Glad cells secrete dirgestive enzymes that brak the soft tissues of the pretty  into tiny pieces. Undigested is eliminated through the same opening by which food is entered. Alimentary canal Two openings in disgestive tube For worm o Food passes through sophagus o Stored and moistened in crop o Mechanical digestion occurs in muscular gizzard, which pulverizes food  with small bits of sand and gravel.
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o Intestinal digestion Grasshopper o Foregut Esophagus and crop Midgut-most digestion occurs here Hindgut Birds o Crop o Stomach o Gizzard Steps of food digestion in human Ingestion occurs in mouth or oral cavity o Mechanical digestion Salivary glands deliever saliva through ducts to oral cavity o Has amylase that breaks down starch o Mucin protects lining of mouth from abrasion also lubricates food for easier swallowing o food in form of bolus o food enters esophagus and NOT trachea (windpipe) o epiglottis prevents food from entering the tachea by covering the glottis o larynx
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upper part of the respiratory tract directs each bolus into the entrance of the esophagus.
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This note was uploaded on 10/18/2010 for the course BIOLGY BILD 2 taught by Professor Burton during the Winter '09 term at UCSD.

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Bild 2 Midterm 2 Review - Bild2Final Review 22:29...

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