BIO REVIEW #2 - MEMBRANES & TRANSPORT | Questions And Answers Latest {} A+ Graded | 100% Verified

BIO REVIEW #2 - MEMBRANES & TRANSPORT | Questions And Answers Latest
{2024- 2025} A+ Graded | 100% Verified


What are at least three types of "integral" proteins? - 1. Channel Protein

2. Carrier Protein

3. Cell Recognition Proteins



What is the fluid mosaic model? - Cells must be fluid and pliable, rigidity can be caused by cholesterol.



How is the plasma "selectively permeable"? - ...



What does "selectively permeable" mean? - Allows only certain substances into the cell while keeping
others out.



Which small, non-charged particles freely pass the membrane barrier? - Carbon dioxide, oxygen,
glycerol, and alcohol.



What is diffusion? - The movement of molecules from a higher to a lower concentration through the
membrane.



Why is diffusion "passive"? - Because it does not require energy and no work is performed.



What is osmosis? - The movement of water from a higher to a lower concentration through the
membrane.



What happens when a cell is placed in an isotonic solution. - Cells do not gain nor lose water.



What happens when a cell is placed in a hypotonic solution. - Cells swell or even burst.



What happens when a cell is placed in a hypertonic solution. - Cells shrink or shrivel.