Presentation is loading. Please wait.

Presentation is loading. Please wait.

Cell Membrane Transport

Similar presentations

Presentation on theme: "Cell Membrane Transport"— Presentation transcript:

1 Cell Membrane Transport

2 GPS Standards SAP1. Students will analyze anatomical structures in relationship to their physiological functions. Relate cellular metabolism and transport to homeostasis and cellular reproduction.

3 Learning Goals By the end of this section, you will be able to:
Describe the components of the cell membrane and their functions. Relate cellular transport to homeostasis. Differentiate between passive transport processes and active transport processes.

4 Medical Terminology Use prefixes, suffixes, and roots sheet to define the following: Use prefixes, suffixes, and roots to define the following: bi- endo- exo- extra- hydro- inter- intra- phago- pino- trans- -osis -philic -phobic cyt integral peripheral transport bilayer extracellular endocytosis exocytosis hydrophilic hydrophobic integral protein intracellular peripheral protein phagocytosis pinocytosis prefix suffix root

5 The Cell Membrane The cell membrane is a selectively permeable membrane that determines which molecules can come into the cell and which molecules can leave the cell.

6 Transverse Section of the cell membrane
Nucleus Cell Membrane Transverse Section of the cell membrane

7 The Cell Membrane

8 Cell Membrane Components
Phospholipid bilayer Made up of Hydrophilic head Hydrophobic tail Allows small molecules, like water and gases, to pass through the membrane easily

9 Cell Membrane Components Continued
Proteins Integral proteins Permanently imbedded in the membrane Used as carrier proteins for large molecules Peripheral proteins Loosely bonded to the internal and external surfaces of the membrane Mainly used in cell to cell communication and the immune response

10 Passive Transport A process that moves molecules across the cell membrane without energy from the cell Moves molecules from high to low concentrations Like riding a bike downhill Processes Diffusion Osmosis Facilitated Diffusion

11 Diffusion The movement of molecules from an area of higher concentration to an area of lower concentration.

12 Diffusion

13 Osmosis The diffusion of water across a selectively permeable membrane. Osmotic solutions can be Hypotonic (hypo- means “less than”) Isotonic (iso- means “the same”) Hypertonic (hyper- means “more than”)

14 Osmosis Hypertonic Isotonic Hypotonic

15 Cells in Osmotic Solutions

16 Facilitated Diffusion
The diffusion of molecules across a membrane with the help of transport molecules imbedded in the cell membrane.

17 Facilitated Diffusion

18 Facilitated Diffusion

19 Active Transport A process that drives large molecules across the cell membrane from a region of lower concentration to a region of higher concentration Like riding a bike uphill Processes Endocytosis Exocytosis Ion Pumps

20 Endocytosis Molecules are brought into the cell by vesicles formed from the cell membrane Processes Pinocytosis. The cell takes tiny droplets from its surroundings into tiny vesicles. Phagocytosis. The vesicle engulfs food particles that are digested by lysosomes.

21 Endocytosis


23 Exocytosis Molecules are forced out of the cell by vesicles made by the Golgi apparatus

24 Exocytosis

25 Exocytosis

26 Ion Pumps Ion pumps use integral proteins and energy (ATP) to transport ions, such as sodium (Na) and potassium (K) across the membrane.

Download ppt "Cell Membrane Transport"

Similar presentations

Ads by Google