Openstax college biology 2013 one of the passive

This preview shows page 3 - 4 out of 4 pages.

(OpenStax College biology, 2013). One of the passive forms is the diffusion , that mean to help the non-polar molecules to move directly in membrane from high concentration to low concentration directly in a layer without any assistance and the element might be in a form of gases or liquid an example the movement of oxygen in the cell. The facilitated diffusions help the polar materials which been blocked from the phospholipids to pass through the membrane with the assistant of the plasma proteins enzymes. There are different type of the facilitated diffusion the channel and the carrier proteins , the protein helped the substance to move across membrane and the channel structure and moved the ions through water-filled protein channel it this channel divided for two channel the leak channels , means it’s always open, and the gated channel just open when some elements stimulate it . The other type called the carrier proteins that allowed the polar such as the glucose atoms to move through the membrane by changing the channel shape while the molecular is moving for the other side. Also, the osmosis transfers only the water across a semipermeable membrane, so it allowed the water to move and not let the solutes to move from low pressure to high pressure. While the active transport it’s a process of solutes movement in the cell and required to use energy (ATP) from high concentration to low concentration, there are two types of active transport the primary and secondary. Primary transport used energy directly with the ion pump( sodium-potassium pump) to help the sodium to go out of the cell a the let the potation to enter the cell to move across the membrane, by using
Image of page 3

Subscribe to view the full document.

Image of page 4
  • Fall '19
  • dont use this
  • OpenStax College biology

{[ 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