Type of Solution Isotonic- a solution whose osmotic pressure is equal to that of the cell, no change will occur thus a balance is maintained a solution that causes no change in the size of the cell
Type of Solution Hypertonic- a solution whose osmotic pressure is greater than that of the cell a solution that causes a cell to shrink because of Osmosis
Type of Solution Hypotonic- a solution whose osmotic pressure is lower than that of the cell a solution that causes water to enter the cell, thus the cell will swell or even burst.
Osmosis In this picture a red blood cell is put in a glass of distilled water. Because there is a higher concentration of water outside the cell, water enters the cell by OSMOSIS. In this case too much water enters and the cell swells to the point of bursting open.
Simple Diffusion The particle is transported through the membrane without the aid of permease and w/o expenditure of energy by the cell Passive Transport
Facilitated Diffusion The particle is transported through the permease of the membrane but w/o expenditure of energy by the cell. Passive Transport
Active Transport Theparticle is transported through the permease of the membrane and with the expenditure of energy (ATP) by the cell.
Bulk TransportBulk transport involves thecell membrane making Two kinds of bulk transportvesicles to bring materials 1. Exocytosis: movingin and out of the cell. materials OUT of the cell. 2. Endocytosis: moving materials INTO the cell. There are 2 types of endocytosis: 1. Pinocytosis: bringing small molecules or liquids into the cell 2. Phagocytosis: bringing large molecules into the cell
ExocytosisExocytosis is the process of exportingmaterials out of the cell byforming a membrane bound vesiclearound the materials. The cell usesexocytosis to get rid of cell waste or toexport proteins made in the cell to giveto other cells.
Endocytosis-Pinocytosis Endocytosis is the movement of materials into the cell through membrane bound vesicles. One type of endocytosis is called Pinocytosis, or “cell drinking”. Pinocytosis is the movement of small molecules or liquids into the cell through bulk transport.
Endocytosis-Phagocytosis phagocytosis, or “cell eating”. Phagocytosis is the movement of large molecules into the cell through bulk transport.
Endocytosis-Phagocytosis The large molecules make contact with the cell membrane and the cell membrane pinches off around the molecules. The lysosomes then fuse with the vesicle and break down the large molecules into nutrients. Phagocytosis is how white blood cells engulf bacteria and break them down. The lysosomes then fuse with the vesicle and break dow the large molecules into nutrients. Phagocytosis is how white blood cells engulf bacteria an break them down.
Why are osmosis & diffusion important? All living things have certain requirements they must satisfy in order to remain alive – maintain homeostasis These include exchanging gases (usually CO2 and O2), taking in water, minerals, and food, and eliminating wastes. These tasks happen at the cellular level. Molecules move through the cell membrane by diffusion A balance, or EQUILIBRIUM, must be maintained.