AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!

AP Biology Cell Transport Flashcards

Covers general terms for cellular transport for AP Biology.

Terms : Hide Images
5930445780Selectively Permeablea property of cell membranes that allows some substances to pass through, while others cannot0
5930445781Phospholipid Bilayerdouble layer of phospholipids that makes up plasma and organelle membranes1
5930445782Integral Proteinspenetrate the hydrophobic core and often span the membrane2
5930445783Peripheral ProteinsBound to the inner or outer surfaces of the membrane and are easily separated from it.3
5930445784Glycoproteinsproteins that have carbohydrates covalently bonded to them4
5930445785Glycolipidslipid that have carbohydrates covalently bonded to them5
5930445786Passive Transporttransport that does not require the cell to expend energy (high to low concentration)6
5930445787Active Transportenergy-requiring process where a substance moves against the concentration gradient (low to high concentration)7
5930445788Diffusionnet movement of a substance down a concentration gradient (high to low)8
5930445789Facilitated Diffusiondiffusion of solutes across a membrane, with the help of transport proteins9
5930445790Osmosisdiffusion of water across a selectively permeable membrane10
5930445791Hypertonicsolute concentration is greater than inside the cell, cell loses water; plant cells plasmolyze, animal cells crenate11
5930445792Hypotonicsolute concentrations in less than inside the cell, cell gains water; animal cells lyse, plant cells have ideal turgor pressure12
5930445793Isotonicsolute concentrations are the same on both sides of the membrane, cell does not gain or lose water; ideal condition for animal cells13
5930445794Sodium-Potassium Pumpactively pumps Na+ ions out and K+ ions in, 3 Na leave for every 2 K that enter14
5930445795Proton Pumppumps (H+ ions) out of the cell, creating a proton gradient, protons diffuse back into the cell, which powers ATP production15
5930445796CotransportThe coupling of the "downhill" diffusion of one substance to the "uphill" transport of another against its own concentration gradient.16
5930445797Exocytosisexporting macromolecules by fusion of vesicles with the plasma membrane17
5930445798Endocytosisimporting macromolecules by forming vesicles derived from plasma membrane18
5930445799Phagocytosispart of the cell membrane engulfs large particles or entire cells (cell eating)19
5930445800Pinocytosispart of the cell membrane engulfs small dissolved substances or fluid droplets in vesicles (cell drinking)20
5930445801Receptor-Mediated Endocytosisimporting of specific macromolecules by receptor proteins bind to a specific substance which triggers the inward budding of vesicles formed from coated pits21
5930445802Ligandsmolecule that binds to the specific receptor site on another molecule22
5930445803Clathrin Coated Pitsareas of the plasma membrane containing receptors that will cause endocytosis when the appropriate ligand binds23
5930445804Fluid Mosaic Modelstates that the membrane is a fluid structure with a mosaic of various proteins embedded in it24
5930445805Transport Proteinsallow passage of hydrophilic substances across the membrane25
5930445806Concentration Gradienta difference in concentration across a distance26
5930445807Turgor Pressurethe pressure that is exerted on the inside of cell walls, caused by the movement of water into the cell27
5930445808Gated Channelsprotein channel in a cell membrane that opens or closes in response to a particular stimulus28
5930445809Aquaporinsfacilitates the passage of water into a cell29
5930445810plasmolysisAs a plant cell loses water, it shrivels, and its plasma membrane pulls away from the cell wall30
5930445811crenationCondition wherein animal cells decrease in size, shrivel and wrinkle, and are no longer functional when in a hypertonic solution31
5930445812cholesterolA large, ring shaped lipid found in cell membranes. Its presence helps to maintain flexibility and fluidity in the membrane.32

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!