8 flagella exert a force perpendicular to the plasma

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

8. Flagella exert a force perpendicular to the plasma membrane 9. and are involved in movement of the entire cell. Why is the cytoskeleton such an important structural component of cells? (3’) Answer: 1. The cytoskeleton maintains cell shape, 2. facilitates cell and organelle movement, 3. and is involved in cell division. When a cell grows, it must produce more plasma membrane material. How does the cell do this? (2’) Answer: 1. An ER vesicle is sent off to the Golgi apparatus. 2. The Golgi apparatus repackages the contents and sends a new vesicle to fuse with the plasma membrane, which helps to create more plasma membrane. Soap and detergent molecules have a long, hydrophobic tail and a polar, hydrophilic head. They are sometimes referred to as bridge molecules because they allow oils and fats to be suspended and dissolved in water (which they otherwise would not be able to do). Imagine that you are using soap to wash away dirt that is being held against your skin in an oily film. How are the soap, dirt/oil, and water arranged at the molecular level? (2’)
Image of page 1

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

A) The soap molecules encase the dirt/oil within a small droplet that has a hydrophobic exterior and a hydrophilic interior. B) Water and dirt/oil form covalent bonds inside a small droplet that has a soap-based outer membrane. C) The soap molecules encase the dirt/oil within a small droplet that has a hydrophilic exterior and a hydrophobic interior.
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.
  • Fall '18
  • cilia

{[ 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