1 / 17

Cell Types Review and Plasma (cell) membrane

Cell Types Review and Plasma (cell) membrane. Section 2 Objectives – page 175. Section Objectives. Identify the differences between eukaryotic and prokaryotic cells. Review the structure and function of the plasma membrane. Section 7.1 Summary – pages 171-174. Two Basic Cell Types.

Download Presentation

Cell Types Review and Plasma (cell) membrane

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. Cell Types Review and Plasma (cell) membrane

  2. Section 2 Objectives – page 175 Section Objectives • Identify the differences between eukaryotic and prokaryotic cells. • Review the structure and function of the plasma membrane

  3. Section 7.1 Summary – pages 171-174 Two Basic Cell Types Cells that do not contain internal membrane-bound structures are called prokaryotic cells. • The cells of most unicellular organisms such as bacteria do not have membrane bound structures and are therefore called prokaryotes.

  4. 7.1 Section 7.1 Summary – pages 171-174 Two Basic Cell Types Cells containing membrane-bound structures are called eukaryotic cells. • Most of the multi-cellular plants and animals we know are made up of cells containing membrane-bound structures and are therefore called eukaryotes.

  5. Section 7.1 Summary – pages 171-174 Two Basic Cell Types The membrane-bound structures within eukaryotic cells are called organelles. • Each organelle has a specific function that contributes to cell survival.

  6. Section 7.1 Summary – pages 171-174 Two Basic Cell Types • Separation of organelles into distinct compartments benefits the eukaryotic cells. The nucleus is the central membrane-bound organelle that manages cellular functions.

  7. Section 1 Check Check-up: What makes this cell eukaryotic? A. Because it has membrane-bound organelles. Nucleus Nucleolus Chromosomes B. Because it does not have DNA. Organelles Plasma membrane

  8. Summary Section 2 – pages 175-178 All living cells must maintain a balance regardless of internal and external conditions. Survival depends on the cell’s ability to maintain the proper conditions within itself.

  9. Summary Section 2 – pages 175-178 Why cells must control materials The plasma membrane is the boundary between the cell and its environment.

  10. Summary Section 2 – pages 175-178 It is the plasma membrane’s job to: • allow a steady supply of glucose, amino acids, and lipids to come into the cell no matter what the external conditions are. • remove excess amounts of these nutrients when levels get so high that they are harmful. • allow waste and other products to leave the cell.

  11. Summary Section 2 – pages 175-178 This process of maintaining the cell’s environment is called homeostasis. Selective permeabilityis a process used to maintain homeostasis in which the plasma membrane allows some molecules into the cell while keeping others out.

  12. Summary Section 2 – pages 175-178 Plasma Membrane Water

  13. Summary Section 2 – pages 175-178 Structure of the Plasma Membrane The plasma membrane is composed of two layers of phospholipids back-to-back. Phospholipids are lipids with a phosphate attached to them.

  14. Summary Section 2 – pages 175-178 Makeup of the phospholipid bilayer The phosphate group is critical for the formation and function of the plasma membrane. Phosphate Group is polar like water. The tails are non- Polar and do not Interact with water

  15. Summary Section 2 – pages 175-178 Makeup of the phospholipid bilayer The fluid mosaic modeldescribes the plasma membrane as a flexible boundary of a cell. The phospholipids move within the membrane.

  16. Summary Section 2 – pages 175-178 Other components of the plasma membrane: Cholesterol plays the important role of preventing the fatty acid chains of the phospholipids from sticking together – it gives it strength. Cholesterol Molecule

  17. Summary Section 2 – pages 175-178 Other components of the plasma membrane: Transport proteins allow needed substances or waste materials to move through the plasma membrane. Click image to view movie.

More Related