Biol110-10-Lecture 3-Membranes

Biol110-10-Lecture 3-Membranes - Biol110 Fall 2010-Cell...

Info icon This preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Biol110- Fall 2010-Cell Biology Cell compartmentalization is achieved by the use of membranes, which are composed of phospholipid bilayers. Membranes make life on Earth possible, but they also present a great problem, as they impose barriers to nutrient diffusion and to intracellular transport Assigned reading for next class: Chapter 11 (pg. 651-683)
Image of page 1

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

View Full Document Right Arrow Icon
Characteristics of biological membranes- (e.g. the plasma membrane)- 1. fluidity 3. function The membrane encapsulates cellular components and maintains an equal solute concentration between the inside and the outside of the cell. A biological membranes’ main function is to segregate chemicals. Outside Inside 35-50 Å 2. morphology Membranes impose barriers to diffusion
Image of page 2
Intracellular membranes serve as physical barriers that allow compartmentalization- Membranes everywhere…
Image of page 3

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

View Full Document Right Arrow Icon
Freeze fracture electron microscopy revealed the presence of proteins in cellular membranes-
Image of page 4
Biomembrane composition (a mosaic)- http://www.youtube.com/watch?v=ULR79TiUj80&feature=related Movie: Biomembranes ”The fluid mosaic model”
Image of page 5

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

View Full Document Right Arrow Icon
Membrane permeability
Image of page 6
Image of page 7
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