BIO 114 Chapter 5 Review Questions and Correct Answers
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Course
BIO 114
Institution
BIO 114
Fluid Mosaic Model Used to describe a membranes structure - a patchwork of diverse protein molecules embedded in a phospholipid bilayer
Diffusion Tendency of particles to spread out evenly in an available space
Concentration Gradient Particles move from an area of more concentrated particles to a...
BIO 114 Chapter 5 Review Questions
and Correct Answers
Fluid Mosaic Model ✅Used to describe a membranes structure
- a patchwork of diverse protein molecules embedded in a phospholipid bilayer
Diffusion ✅Tendency of particles to spread out evenly in an available space
Concentration Gradient ✅Particles move from an area of more concentrated particles
to an area where they are less concentrated
Passive Transport ✅Does not require energy to diffuse across a cell membrane
Osmosis ✅The diffusion of water across a selectively permeable membrane
Tonicity ✅The ability of a surrounding solution to cause a cell to gain or lose water
Isotonic ✅The concentration of solute is the same on both sides of a membrane
- the cell volume will not change
Hypotonic ✅The solute concentration is lower outside the cell
- water molecules move into the cell
- the cell will expand and may burst
Hypertonic ✅The solute concentration is higher outside the cell
- water molecules move out of the cell
- the cell will shrink
Osmoregulation ✅The control of water balance
Facilitated Diffusion ✅The movement of polar and charged substances across a
membrane with the help of specific transport proteins
- no energy
- relies on concentration gradient
Aquaporin ✅Protein channel that allows for rapid diffusion of water in and out of
certain cells
Active Transport ✅A cell must expend energy (ATP) to move a solute against its
concentration gradient
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