1 / 15

Cells

Cells. Chapter 3. Composite Cell. The three major parts of a human cell is a nucleus , cytoplasm , and cell membrane Nucleus-houses the genetic material Cytoplasm-surrounds the nucleus and contains all the other organelles

medge-farrell
Download Presentation

Cells

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cells Chapter 3

  2. Composite Cell • The three major parts of a human cell is a nucleus, cytoplasm, and cell membrane • Nucleus-houses the genetic material • Cytoplasm-surrounds the nucleus and contains all the other organelles • Cell Membrane-surrounds the cytoplasm and controls what goes in and out, also communicates with other cells • Organelles-specialized structures that perform specific functions which divide the labor of the cell

  3. http://images.protopage.com/view/721661/9om6i6botf38jm7zive0ddjpj.jpghttp://images.protopage.com/view/721661/9om6i6botf38jm7zive0ddjpj.jpg

  4. Cell membrane • Regulates movement of substances in and out of cell • Molecules that are part of the membrane receive information from outside and transmit it inward in a process called signal transduction • Also, helps adhere to other cells (important in forming tissues) • It is selectively permeable because it only lets some substances in and out of the cell

  5. http://upload.wikimedia.org/wikipedia/commons/e/ee/CellMembraneDrawing.jpghttp://upload.wikimedia.org/wikipedia/commons/e/ee/CellMembraneDrawing.jpg

  6. Cell Membrane structure • Composed of lipids, proteins, and carbs • Mainly a phospholipid bilayer (two layers) • The surface is made up of water soluble phosphate heads (hydrophilic-water loving) and water-insoluble fatty acid tales make up the interior (hydrophobic-water hating)

  7. http://t1.gstatic.com/images?q=tbn:ANd9GcSRFknJcaIVMIHrcsa-2d6DUgwFPkxA-JqQ-NYQ2HbfY6Jz3W-8http://t1.gstatic.com/images?q=tbn:ANd9GcSRFknJcaIVMIHrcsa-2d6DUgwFPkxA-JqQ-NYQ2HbfY6Jz3W-8

  8. O, and CO2 (soluble in lipids) can pass through easily • Water soluble molecules like amino acids, sugars, proteins, nucleic acids, and many ions cannot readily pass through • Cholesterol is also imbedded in membrane and make it less soluble, also stabilizes the membrane

  9. http://www.dynamicscience.com.au/tester/solutions/biology/cell/cholesterol.jpghttp://www.dynamicscience.com.au/tester/solutions/biology/cell/cholesterol.jpg

  10. Also has proteins which: • Are receptors (hormones, growth factors) • Transport molecules or ions • Support the cells interior • Hold carbohydrates for identification and signaling • Determine where cells move in the body

  11. http://img.sparknotes.com/figures/A/a981208a1abd542364d5a13c08702881/cellmembrane.gifhttp://img.sparknotes.com/figures/A/a981208a1abd542364d5a13c08702881/cellmembrane.gif

  12. Cytoplasm • Contains networks of membranes and organelles suspended in the cytosol (clear liquid) • Also, contains Cytoskeleton which is a framework of proteins • Many types of organelles in cytoplasm

  13. http://nursingcrib.com/wp-content/uploads/cell2.jpg?9d7bd4

  14. Cell Nucleus • Houses the genetic material which directs all cell activities • Surrounded by the nuclear envelope which is a bilayer of phospholipids

  15. http://library.thinkquest.org/06aug/01942/plcells/thinkquest/nucleus.jpghttp://library.thinkquest.org/06aug/01942/plcells/thinkquest/nucleus.jpg

More Related