{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

campbl08 - For more on this history see...

Info icon This preview shows pages 1–18. Sign up to view the full content.

View Full Document Right Arrow Icon
History of Fluid Mosaic Model For more on this history, see: http://www1.umn.edu/ships/9-2/membrane.htm
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
Phospholipids—Lipid Bilayar
Image of page 2
Membrane Fluidity Note that proteins can also be anchored to cytoskeleton Lipid bilayers are fluid, at normal body (organismal) temperatures, but typically only in two dimensions!
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
Membrane Proteins
Image of page 4
Membrane Protein Functions
Image of page 5

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

View Full Document Right Arrow Icon
Membrane Assymetry This asymmetry allows the cell to automatically differ its intracellular environment from that existing extracellularly
Image of page 6
Membrane Glycoproteins
Image of page 7

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

View Full Document Right Arrow Icon
Fluid Mosaic Model
Image of page 8
Movement Across Membranes Passive Transport Simple diffusion (passive diffusion) Facilitated diffusion Transporters Uniporters Cotransporters Channel proteins Active Transport Pumps Group Translocation Electrochemical Gradients
Image of page 9

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

View Full Document Right Arrow Icon
Movement Across Membranes Passive Transport Simple diffusion (passive diffusion) Facilitated diffusion Transporters Uniporters Cotransporters Channel proteins Active Transport Pumps Group Translocation Electrochemical Gradients
Image of page 10
Primer on Diffusion Diffusion is movement from area of high concentration to low Diffusion is Passive Transport: no energy is required
Image of page 11

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

View Full Document Right Arrow Icon
Simple Diffusion Across Bilayers Passive diffusion - unaided by transport proteins - no metabolic energy expended - movement is down chemical concentration gradient - diffusion rate is proportional to concentration gradient and hydrophobicity - rate limiting step is movement across hydrophobic portion of membrane - the greater the hydrophobicity of a water-soluble molecule, the faster it diffuses across phospholipid bilayer.
Image of page 12
Simple Diffusion Across Bilayers
Image of page 13

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

View Full Document Right Arrow Icon
Diffusion Across Membranes
Image of page 14
Osmosis: H 2 0 Down Conc. Gradient
Image of page 15

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

View Full Document Right Arrow Icon
Osmosis: H 2 0 Down Conc. Gradient Equilibrium
Image of page 16
Tonicity: H 2 0 Down Conc. Gradient
Image of page 17

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

View Full Document Right Arrow Icon
Image of page 18
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