chapter5b Membrane Dynamics 2

chapter5b Membrane Dynamics 2 - Chapter 5b Membrane...

Info icon This preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 5b Membrane Dynamics
Image of page 1

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

View Full Document Right Arrow Icon
Energy Transfer in Living Cells Figure 5-16 ATP Secondary active transport Primary active transport Metabolism The chemical bond energy is converted into high-energy bonds of ATP through the process of metabolism. The energy in the high-energy phosphate bond of ATP is used to move K + and Na + against their concentration gradients. This creates potential energy stored in the ion concentration gradients. The energy of the Na + gradient can be used to move other molecules across the cell membrane against their concentration gradients. Energy is imported into the cell as energy stored in chemical bonds of nutrients such as glucose. Glucose Pyruvate CA cycle Heat H 2 O CO 2 ADP+P i O 2 High [K + ] Low [Na + ] Na + Na + Glycolysis ETS K + K + 2 Cl– Low [K + ] High [Na + ] Glucose ATP ATP ETS = Electron transport system = Citric acid cycle CA cycle KEY
Image of page 2
Carrier-Mediated Transport Specificity Competition Saturation Transport maximum
Image of page 3

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

View Full Document Right Arrow Icon
Carrier-Mediated Transport Competition Figure 5-17
Image of page 4
Carrier-Mediated Transport Competition Figure 5-18 (b) Maltose (a) The GLUT transporter Maltose Glucose Glucose GLUT transporter Intracellular fluid Extracellular fluid
Image of page 5

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

View Full Document Right Arrow Icon
Carrier-Mediated Transport Saturation Figure 5-19
Image of page 6
Vesicular Transport Phagocytosis Cell engulfs bacterium or other particle into phagosome Endocytosis Membrane surface indents and forms vesicles Active process that can be nonselective ( pinocytosis ) or highly selective Potocytosis uses caveolae Receptor-mediated uses clathrin-coated pits
Image of page 7

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

View Full Document Right Arrow Icon
Phagocytosis Figure 5-20 1 Bacterium Lysosome Phagocyte The phagocytic white blood cell encounters a bacterium that binds to the cell membrane. The phagocyte uses its cytoskeleton to push its cell membrane around the bacterium, creating a large vesicle, the phagosome. The phagosome containing the bacterium separates from the cell membrane and moves into the cytoplasm. The phagosome fuses with lysosomes containing digestive enzymes. The bacterium is killed and digested within the vesicle. 2 3 4 5
Image of page 8
Phagocytosis Figure 5-20, step 1 1 Bacterium Lysosome Phagocyte The phagocytic white blood cell encounters a bacterium that binds to the cell membrane.
Image of page 9

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

View Full Document Right Arrow Icon
Phagocytosis Figure 5-20, steps 1–2 1 Bacterium Lysosome Phagocyte The phagocytic white blood cell encounters a bacterium that binds to the cell membrane.
Image of page 10
Image of page 11
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