Transport

Notes for Transport

Passive Transport – movement of molecules without the use of energy. Diffusion – the movement of molecules through space from an area of greater concentration to an area of lesser concentration. Concentration Gradient - the difference in concentration of molecules across a space. Equilibrium – When the concentration of molecules is the same throughout a space. Osmosis – The movement of water molecules across a membrane from an area of greater concentration to an area of lesser concentration. A special kind of diffusion. Hypotonic – The concentration of solute molecules is lower. Hypertonic – The concentration of solute molecules is higher. Isotonic – The concentration of solute molecules is the same. Hypertonic || Hypotonic || Out of the cell || Loss of Turgor Pressure || Hypotonic || Hypertonic || Into the cell || <span style="font-family: Arial,sans-serif;">Increase of Turgor Pressure || <span style="display: block; font-family: Arial,sans-serif; text-align: center;">Isotonic || <span style="display: block; font-family: Arial,sans-serif; text-align: center;">Isotonic || <span style="display: block; font-family: Arial,sans-serif; text-align: center;">No Net Movement || <span style="font-family: Arial,sans-serif;">Homeostasis || Plasmolysis - loss of turgor pressure, resulting in shrinkage or wilting. Cytolysis - increase in turgor pressure, resulting in bursting. <span style="font-family: Arial,sans-serif;">Homeostasis – A biological balance between a cell and its environment <span style="font-family: Arial,sans-serif;">Turgor Pressure – Water pressure within the cell Facillitated Diffusion - Assisted diffusion, carrier molecules move substances across the membrane. Carrier molecules - proteins that transport materials across the cell membrane. Ion channels - Small passages through the cell membrane through which ions can move. Ions - Atoms with an electric charge. <span style="font-family: Arial,sans-serif;">Active Transport – The movement of molecules requiring the use of energy (ATP) <span style="font-family: Arial,sans-serif;">Sodium-Potassium Pump – Many organisms need a higher concentration of Na+ outside the cell and K+ inside the cell. – 3 Na+ leave the cell for every 2 K+ that enter. – Involves the use of a carrier protein. <span style="font-family: Arial,sans-serif;">Endocytosis – The process by which a cell takes in large particles, macromolecules or fluids. <span style="font-family: Arial,sans-serif;">Exocytosis – The process by which a cell gets rid of large particles and wastes.
 * <span style="display: block; font-family: Arial,sans-serif; text-align: center;">Condition || <span style="display: block; font-family: Arial,sans-serif; text-align: center;">Environment  || <span style="display: block; font-family: Arial,sans-serif; text-align: center;">Cell  || <span style="display: block; font-family: Arial,sans-serif; text-align: center;">Water moves  || <span style="display: block; font-family: Arial,sans-serif; text-align: center;">Results  ||
 * <span style="display: block; font-family: Arial,sans-serif; text-align: center;">Concentration of solute molecules is higher in the environment ||
 * <span style="display: block; font-family: Arial,sans-serif; text-align: center;">Concentration of solute molecules is lower in the environment ||
 * <span style="display: block; font-family: Arial,sans-serif; text-align: center;">Concentration of solute molecules is the same in the environment and the cell ||

<span style="font-family: Arial,sans-serif;">[|Bill Nye Cells]

[|Transport Video]

[|Egg Demo]

[|Transport song]

[|Transport Tutorial with animations]

[|Transport Review In Da Club]