* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Cell Transport
Survey
Document related concepts
Lipid bilayer wikipedia , lookup
Cell nucleus wikipedia , lookup
Cytoplasmic streaming wikipedia , lookup
Membrane potential wikipedia , lookup
Extracellular matrix wikipedia , lookup
Cellular differentiation wikipedia , lookup
Cell culture wikipedia , lookup
Cell encapsulation wikipedia , lookup
Cell growth wikipedia , lookup
Signal transduction wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Cytokinesis wikipedia , lookup
Cell membrane wikipedia , lookup
Transcript
Name: _______________________________________ Date: __________ Biology Period:____ Cell Membrane and Cell Transport --- Student Notes SB1. a. Students will be able to explain the role of the cell membrane in maintaining homeostasis. d. What is the impact of water on life processes? (i.e. osmosis and diffusion) LEQ4: _________________________________________________________________ Structure: Cell/Plasma Membrane Composed of two ___________________ layers (bilayer) There are other molecules embedded in the membrane (_________, ___________) The fluid mosaic model describes the membrane. Characteristics of Cell/Plasma Membrane The cell membrane is ____________________________________ Some molecules can cross the membrane while others cannot So…. The cell membrane is a double layer of membranes of _________________ that only let certain things get in and out of cell. Also called the “_________________” of the cell because it chooses what enters or does not. Recap: What is the Cell Membrane? Also called the __________________ membrane Is a semi-permeable __________________ __________________ Semi - __________________ Permeable: passes through Lipid: made of fat Bi - __________________ Layer – flat sheets Function of Plasma/Cell Membrane Forms a boundary between ____________ and ___________ of the cell Controls passage of materials Materials include: ______________ Glucose Nutrients Protects and ____________ the cell Transmits ____________________________________ across cell Chemical signals are transmitted across the cell membrane Receptors bind with ____________ and change shape Chemical Signals of Cell/Plasma Membrane There are two types of receptors: ______________________ receptor Membrane receptor Concept Check List 3 reasons why membrane receptors are important in maintaining homeostasis: 1. __________________________________________________________________ 2. __________________________________________________________________ 3. __________________________________________________________________ Cell Transport: Osmosis and Diffusion differences/gradient. Materials move across membranes because of concentration Label diagram: Determine High and Low concentration. Substances move from ______________ to ____________ concentration. Passive transport does NOT require energy input from cell. Molecules can move across cell membrane through ______________________. There are two types of passive transport: ___________________________ ___________________________ Concept Check Explain the term concentration gradient. ____________________________________ _______________________________________________________________________ How does it affect the movement of a molecule? _____________________________ Cell Transport: Osmosis and Diffusion Diffusion and osmosis are types of passive transport. Molecules diffuse down a ________________________________. From ___________ to _____________ concentration. Cell Transport: Diffusion Some molecules cannot easily diffuse across the cell membrane. Substances that are not soluble in lipids, like _________ and__________, must have help getting across the membrane. _______________________ is diffusion through transport proteins. Does NOT require energy What can affect diffusion? Size of ______________________ Large molecules do not pass through easily _______________________ The warmer the water or atmosphere the faster the reaction of diffusion Size of concentration ___________________ The greater the concentration differences, the faster the reaction. Does diffusion ever stop? ________________… because particles are in constant motion When the # of particles is equal on both sides of the membrane then _____________ is reached When particles reach equilibrium the rate of diffusion is ____________ across the membrane Cell Transport: Osmosis There are three types of solutions: __________________________ __________________________ __________________________ Concept Check Explain what would happen if you placed a cell in a: Hypotonic Solution _____________________________________________________ Hypertonic Solution _____________________________________________________ Isotonic Solution _______________________________________________________ What type of solution do you think your cells are surrounded by? ______________________________ Cell Transport: Osmosis Osmosis is the diffusion of water molecules across a semipermeable membrane. Water molecules move from high to low concentration. Example: ______________________________________________________________ Active Transport: Endocytosis and Exocytosis Cells also use _____________to transport materials that cannot diffuse across a membrane ___________________ requires energy input from a cell and enables a cell to move a substance _______________ its concentration gradient. Active transport is powered by chemical energy (_______________) Remember: ______________requires no energy from the cell Active transport occurs through _____________________ pumps. Cells use active transport to maintain ____________________. There are two (2) types of Active Transport: Endocytosis Exocytosis A cell can ___________ and ____________ large materials or large amounts of materials in vesicles during the processes of Endocytosis and Exocytosis. Endocytosis Process of taking material ____________________ _____________________ is a type of Endocytosis. Cells require energy to transport material in endocytosis. Exocytosis Process of ________________ materials from the cell Cell requires energy to transport materials in endocytosis. Concept Check Complete the T-chart comparing and contrasting Active and Passive Transport. Include Diagrams to help you with your answer PASSIVE ACTIVE