Lecture+notes+26 - Copy

Lecture+notes+26 - Copy - Lecture Notes Bio 109, Fall 2010,...

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Lecture Notes Bio 109, Fall 2010, Dr. Catherine Loudon Lecture 26 – 11/29/10 – Exercise 1) Announcement/Reminders a) Messageboard activated over weekend. b) Last quiz (#9) opens today c) Instructor evaluation (generated by my department) opened yesterday, will close Saturday (2% of total grade in class) (EEE) d) 10 am final exam one week from today: at 10:30 am e) 11 am final exam one week from Friday: at 8 am f) Extra office hour this week: Th 10-11 am 2) Storage of excess energy as fat and glycogen a) Stored fat contains more kcal/g than stored glycogen, more compact b) Stored fat is mobilized more slowly than glycogen (as source of ATP) 3) Numbers provided for comparison of gasoline to adipose tissue a) Gasoline (fossil fuel - that you put in your car): 44.4 MJ/kg i) = 44.4 kJ/g X 1 kcal/4.2 kJ ii) = 10.6 kcal/g b) Fat (adipose tissue) ~9 kcal/g i) Remember that 1 kcal = 1 Calorie (used in nutrition) 4) Optional reading about cholesterol: “Statins: from fungus to pharma” American Scientist, 2008, pp. 408-415 (posted on EEE) 5) Your question – dietary fiber a) “I remember last week you talked about how Olestra caused an increase in lumen osmolarity, thereby causing diarrhea. I was wondering if this is what fiber does for us? Do foods high in fiber or supplements like Metamucil, meant to keep us "regular" work by increasing lumen osmolarity or is it something completely different? If it is indeed the same why is eating foods high in fiber considered good for us then, if we are trying to
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This note was uploaded on 12/01/2010 for the course BIO SCI Bio Sci E1 taught by Professor Catherineloudin during the Spring '10 term at UC Irvine.

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Lecture+notes+26 - Copy - Lecture Notes Bio 109, Fall 2010,...

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