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23 Cards in this Set
- Front
- Back
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Phospholipids |
The polar heads hydrophilic and hydrophobic, permeable to most water soluble molecules in the membrane |
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Cholesterol |
Helps keep the membrane fluid, smaller, embedded in phospholipids to stabilize |
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Proteins in plasma membrane |
Enzymes, receptors, transport proteins, glycoproteins |
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Enzymes |
Help metabolize reactions |
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Receptors |
Senses chemical messengers and hormones |
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Transport proteins |
Holes/ tiny pores in membranes and carriers |
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Glycoproteins |
Determine blood type, receptors for bacteria, viruses, toxins Play role in cell to cell Recognition and interactions "Cell communication" |
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Plasma membrane |
Back (Definition) |
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Junction forming impermeable barrier, cells expecting to find it in |
Tight junctions found in small intestines |
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Attachment between two cells to prevent from pulling apart |
Desmosomes found in skin and urinary bladder |
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Filtration occurs in... |
Kidneys: high water pressure inside capillaries forces water out due to fluid pressure in the tubules being less than that in capillaries |
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Substances passed and that can't be passed by filtration |
Blood cells and large molecules held back
Glucose, water, salts, urea, etc |
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Require ATP |
Endocytosis Exocytosis Solute pumping (active transport) |
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Follow concentration gradient |
Simple diffusion Osmosis Facilitated diffusion |
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Vesicular transport |
Endocytosis Exocytosis |
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Goes with concentration gradient, requires a carrier |
Facilitated diffusion |
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A means of secreting cell products like mucus and protein hormones |
Exocytosis |
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Moves water through a semi permeable membrane |
Osmosis |
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Transports amino acids, some sugars, ions like Na+ and K+ through the plasma membrane |
Solute pumping (active transport) |
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Provides for cellular uptake of solid or large particles from the cell exterior |
Endocytosis |
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Portion of plasma membrane |
Back (Definition) |
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Receptor- mediated Endocytosis |
Plasma membrane receptor proteins only bind with certain substances so cells without the receptors are not susceptible to the chemical messages from substances
Enzymes, hormones, cholesterol, iron, flu viruses also enter and attack through this route |
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Osmotic movement of water |
Back (Definition) |
