Biology 141 Delgado Test 2 Questions and Answers (100% Pass)

Biology 141 Delgado Test 2 Questions and Answers (100% Pass) The cell membrane is also called the ______ and is made of a phospholipid _______ - Answer️️ -plasma membrane / bi-layer The phospholipids have a hydrophillic (water attracting) _____ an two hydrophobic (water repelling) ______ - Answer️️ -head / tails The head of a phospholipid is made of an alcohol and _____ group, while the tails are chains of _______ - Answer️️ -glycerol / fatty acids Phospholipids can move _____ and allow water and other _______ molecules to pass through into or out of the cell. - Answer️️ - sideways / non-polar This is known as ________ because it does NOT require ____ and the water or molecules are moving ____ the concentration gradient - Answer️️ -passive transport / energy / with Another type of lipid in the cell membrane is ______ that makes the membrane more fluid. - Answer️️ -cholesterol Embedded in the phospholipid bilayer are ______ that also aid in diffusion and in cell recognition. - Answer️️ -proteins ©SOPHIABENNET@2024/2025 Thursday, August 22, 2024 1:01 AM DELGADO COMMUNITY COLLEGE 2 Proteins called ____ proteins go all the way through the bilayer, while _______ proteins are only on one side. - Answer️️ -integral / peripheral Integral proteins are also called _______ proteins. - Answer️️ - transmembrane Large molecules like _____ or carbohydrates use proteins to help move across cell membranes. - Answer️️ -proteins some of the membrane proteins have carbohydrate _____ attached to help cells in recognize each other and certain molecules. - Answer️️ -parts List 4 functions of the cell or plasma membrane: - Answer️️ -1. Cell signaling 2. Selective transport 3. Remove wastes 4. Structural support Attracts water - Answer️️ -phosphate heads Helps maintain flexibility of membrane - Answer️️ -cholesterol Involved in cell-to-cell recognition (2) - Answer️️ -glycoprotein and glycolipids Repels water - Answer️️ -fatty acid tails ©SOPHIABENNET@2024/2025 Thursday, August 22, 2024 1:01 AM DELGADO COMMUNITY COLLEGE 3 Make up the bilayer (2) - Answer️️ -fatty acid tails and phosphate heads Help transport certain materials across the cell membrane - Answer️️ -integral protein The movement of water across a selectively permeable membrane from an area of high concentration to an area of low concentration - Answer️️ -osmosis In which direction does water move across membranes, up or down the concentration gradient? - Answer️️ -down the concentration of dissolved particles are the same inside and inside and outside the cell - there is no overall change in the cell size - Answer️️ -isotonic The concentration of dissolved particles are higher outside the cell than inside the cell - water will leave the cell in an attempt to dilute the outside concentration - Answer️️ -hypertonic The concentration of dissolved particles are lower outside the cell than inside the cell - water will enter the cell in an attempt to dilute the inside concentration - Answer️️ -hypotonic solution with a lower solute concentration (Iso, Hyper