bi 121 lecture 6 + q + ½ midterm review i. …...bi 121 lecture 6 + q + ½ midterm review i....
TRANSCRIPT
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BI 121 Lecture 6 + Q + ½ Midterm Review
I. Announcements Next session Q? ~½ review, then Midterm.Fun Lab 3 Nutrition today! Sample Suisse Calculation? Q?
II. Nutrition in the News Be a whiz at healthy grilling!American Institute for Cancer Research, Grilling Quiz!
III. Digestion Connections LS ch 15, DC Module pp 17-23A. Histology & control of the gut LS fig 15-2, 15-3 p 442-3B. Stomach protein digestion + zymogens? LS fig 15-7, 15-9C. Accessory organs: Pancreas & Liver + Recycling!
LS pp 457-63D. Small intestine? Ulcers? LS fig 15-20,15-22 pp 467-8
http://www.cdc.gov/ulcer Beyond the Basics LS p 456E. Summary of chemical digestion LS tab 15-5 p 466 F. Large intestine? LS fig 15-24 pp 472-4
IV. Midterm Review Discussion + Q?
Hey – I'll be ready because I book it!!
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Stay focused now!Later, have fun &
be safe!!
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% Calories? Know:
Carbohydrate? 4 kcal/g
Fat? 9 kcal/g
Protein? 4 kcal/g
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Carbohydrate 46 g x 4 kcal/g = 184 kcal
Fat 39 g x 9 kcal/g = 351 kcal
Protein 8 g x 4 kcal/g = 32 kcal
∑ = 567 kcal
% Carbohydrate = 184/567 = 0.326 ≡ ~33%
% Fat = 351/567 = 0.619 ≡ ~ 62%
% Protein = 32/567 = 0.056 ≡ ~ 6%
How Do I Calculate the % of Total Calories from Carbohydrate, Fat & Protein?
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American Institute for Cancer Research (AICR) Healthy Grilling Quiz Summary
1. Marinade, marinade, marinade! By doing so, you can decrease carcinogens formed during grilling by < 96%!
2. Cover the grill with aluminum foil, turn gas down or wait for low-burning embers, cook to the side.
3. Best choices for grilling include vegetables and fruits (no HCAs + enzymes to inactivate HCAs!), and lean meats (eg, fish & skinless chicken PAHs).
4. Flip meat every minute to reduce charring & remove charred portions prior to eating.
5. To limit cancer risk, eat no more than 3 oz grilled red meat. Cook small portions/kebabs.
AICR Newsletter, Summer 2006
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LS 2012 fig 15-2 p 442
Longitudinal Shortens L
Circular ↓d or Width
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MuscularisExterna
Glands
LumenLaminaPropria
LongitudinalMuscle
CircularMuscle
Epithelium
Submucosa
Serosa
H Howard 1990
Meissner’s sensory & secretory plexus!
Myenteric motor plexus! cf: G&H fig 62-2
LOC
AL
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LS 2006, 2012 fig 15-3 p 443
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Common Control MechanismsCommon Control Mechanisms
1. Local (autoregulation)
2. Nervous (rapidly-acting)
3. Hormonal (slower-acting/ reinforcing)
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Where does Where does enzymaticenzymatic
digestion of digestion of proteinproteinbegin?begin?
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LS 2012 p 447
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Zymogen= an inactive precursor
LS 2012 fig 15-9 p 452
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Why is the Why is the pancreaspancreas so so
unique?unique?
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LS 2012 fig 15-11 p 457
Endocrine + Exocrine functions; Makes enzymes for
digesting all 3 energy nutrients!
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DC 2003
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Liver: Amazing Recycling of Bile Salts!
LS 2012 fig 15-11 p 462
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Absorption!!Absorption!!
What is the What is the majormajorfunctionfunction of the of the
small intestine? small intestine?
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LS 2012 fig 15-20 p 467
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LS 2012 fig 15-22a p 468
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http://www.cdc.gov/ulcer/
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Ulcer Facts •Most ulcers are caused by an infection, not spicy food, acid or stress. •The most common ulcer symptom is burning pain in the stomach. •Your doctor can test you for H. pyloriinfection. •Antibiotics are the new cure for ulcers. •Eliminating H. pylori infections with antibiotics means that your ulcer can be cured for good.
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LS 2012 p 446
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LS 2012 fig 15-24 p 472
Large Intestine Structure & Function
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DC 2003
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https://www.supertracker.usda.gov/
Lab 3: Nutritional Analyses via 2 Programs
VERSION 10.0VERSION 10.0+