Cell Membrane Worksheet

cell membrane coloring worksheet plasma membrane what is the cell membrane also known as? in a phospholipid bilayer how is the cell membrane structured? head; tails the phospholipids had a hydrophilic (water attracting) _____ and two hydrophobic (water repelling) ____. an alcohol and glycerol group what is the head of a phospholipid composed of? chains of fatty acid what is the tails of a phospholipid composed of? laterally/sideways how can phospholipids move? non-polar what kind of molecules can pass into or our of the cell? movement of molecules into/out of the cell... • does not require energy • molecules move with/through the concentration gradient what is simple diffusion? (phospholipid diagram) cholesterol what lipid makes the cell membrane more fluid? proteins what structures aid in diffusion and cell recognition? integral; peripheral proteins called _____ proteins go all the way through the bilayer, while _____ proteins are only on one side. transmembrane proteins what are integral proteins also known as? large molecules (e.g. lipids and carbohydrates) what type of molecular structures use proteins to help move across cell membranes? carbohydrate molecules attached to some membrane proteins what molecular structure helps cells to recognize each other and certain molecules • selectively permeable barrier... separates the cells from each other and their environment, as well as controlling what goes in and out of the cell • communication/receptor • structural support what are the functions of the cell/plasma membrane? which letter represents the phospholipid bilayer? a b which letter represents the integral protein? f which letter represents the fatty acid tails? g which letter represents the phosphate heads? h which letter represents the peripheral protein? i which letter represents the cholesterol molecule? c which letter represents the glycoprotein? e which letter represents the glycolipids? phosphate heads what structure in the cell membrane attracts water? 1/4 cholesterol what structure in the cell membrane helps maintain the flexibility of the membrane? glycoproteins and glycolipids what structure in the cell membrane is involved in cell-to-cell recognition? phosphate heads and fatty acid tails what structure in the cell membrane make up the bilayer? fatty acid tails what structure in the cell membrane repels water? integral proteins what structure in the cell membrane help transport certain materials across the cell membrane? the diffusion of water from a higher concentration of water to a lower concentration of water what is osmosis? down/against the concentration gradient in which direction does water move across membranes in osmosis (up or down the concentration gradient)? a solution that is equal in solute and equal in water what is isotonic? a solution that is greater in solute and less in water what is hypertonic? a solution that is less in solute and greater in water what is hypotonic? the solute concentration of the cell is ___ to its environment. where does the mater move? hypertonic... water moves into the cell the solute concentration of the cell is ___ to its environment. where does the water move? isotonic... water flows both in and out of the cell the solute concentration of the cell is ___ to its environment. where does the water move? hypotonic... water moves out of the cell hypotonic which solution has a lower solute concentration? isotonic which solution is when the solute concentration is the same? 2/4 hypotonic which solution is the condition plant cells require? isotonic which solution causes a red blood cell to burst/lyse (cytolysis)? hypertonic and isotonic which solution causes a plant cell to lose its turgor pressure (plasmolysis)? hypertonic which solution has a higher solute concentration? hypotonic which solution occurs when a plant cell has good turgor pressure? hypotonic which solution has a higher water concentration? what is the tonicity for the following solution? hypotonic what is the tonicity for the following solution? isotonic what is the tonicity for the following solution? hypertonic what is the tonicity for the following solution? hypotonic what is the tonicity for the following solution? 3/4 isotonic what is the tonicity for the following solution? hypertonic what type of transport is represented by the following diagram? active transport ATP what type of energy is used in active transport? against/down in which direction/concentration gradient, is the movement of active transport occurring? sodium-potassium pump which type of active transport helps muscle cells contract? proteins; against/down the sodium-potassium pump uses _____ to move ions _____ the concentration gradient. integral; shape a sodium-potassium pump uses an _____ protein to pump the ions through and it changes its _____ to move the ions across the cell membrane. 4/4