{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture 15 - Leptin - Lecture 15 Background Reading...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Leptin Biology 1F25 for Biology Non-Majors Lecture 15 Background Reading Textbook, Chapter 8. The People Who Prepared This Lecture Harry Peery Jeff Stuart Fat, fat cells, energy, reproduction and human biology The Story of Leptin
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 Fat vs. glycogen or protein Energy density Fat = 9 Cal/g Protein = 4 Cal/g Glycogen = 4 Cal/g Fat vs. glycogen: Hydrophilic vs. hydrophobic Fat repels water; stored unhydrated Glycogen attracts water; stored hydrated Fat vs. glycogen: the bottom line For equivalent energy storage need 10X as much glycogen as fat! *120 lb female with 20% body fat (24 lbs) would weigh >300 lbs if same energy stored as carbs! Just how much energy is in fat? 120 lb person with 20% body fat (= 24 lbs) 24 lbs ~ 11 kg ~ 11,000 g Remember: 1 g fat contains 9 Cal 9 x 11,000 = 99,000 At 2000 Cal/day this is enough for almost 50 days!
Image of page 2
3 Fueling the starving body Days 1-2: glycogen stores are used up Days 2-50+: fat stores are used Days 5-50+: protein is used; but not all protein can be utilized Question: how does the body maintain energy homeostasis?
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern