{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter_8_Outline

Chapter_8_Outline - Ch 8 Membrane Structure and Function I...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Ch. 8: Membrane Structure and Function I. Membrane Structure A. Phospholipids can form membranes and are amphipathic molecules, having hydrophilic and hydrophobic regions. Phospholipids occur in a bilayer as the main fabric of the membrane, with their hydrophilic sides on the outsides and their hydrophobic regions towards the middle of the membrane. B. Freeze-fracture techniques show that proteins are embedded in the phospholipid bilayer of the membrane. C. The cell membrane is fluid because of the weak hydrophobic interactions holding it together; when steroid cholesterol between phospholipids molecules are at warm temperatures, they make the membrane’s movement much less. D. Integral proteins occur at the hydrophobic core of the lipid bilayer; peripheral proteins occur at the exposed parts of integral proteins for the most part. Carbohydrates in the form of oligosaccharides are on the external side of the plasma membrane. II. Traffic across Membranes A. The hydrophilic and hydrophobic ends of the phospholipids affect the selective permeability of the cell membranes. B. The transport proteins are built into the membrane, and they allow hydrophilic substances to pass through the membrane easily by forming somewhat of a tube. Some transport proteins hold onto the substances and move them across the membrane.
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
Image of page 2
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