Chapter 4 BSC2085 UPDATED ACTUAL Questions and
CORRECT Answers
Cell Theory All living things are made of cells.
Cell The smallest unit of life.
Plasma Membrane Thin barrier controlling what enters and leaves the cell.
Phospholipid Bilayer Double layer forming the cell membrane.
Hydrophilic Water-attracting.
Hydrophobic Water-repelling.
Membrane Proteins Proteins that help transport and communication.
Receptor Protein Receives chemical signals.
, Channel Protein Allows substances to pass through.
Carrier Protein Transports substances across membrane.
Selective Permeability Allows some substances through, blocks others.
Concentration Gradient Difference in concentration across a membrane.
Passive Transport Movement without energy.
Diffusion Movement from high to low concentration.
Facilitated Diffusion Diffusion using a transport protein.
Osmosis Diffusion of water across a membrane.
CORRECT Answers
Cell Theory All living things are made of cells.
Cell The smallest unit of life.
Plasma Membrane Thin barrier controlling what enters and leaves the cell.
Phospholipid Bilayer Double layer forming the cell membrane.
Hydrophilic Water-attracting.
Hydrophobic Water-repelling.
Membrane Proteins Proteins that help transport and communication.
Receptor Protein Receives chemical signals.
, Channel Protein Allows substances to pass through.
Carrier Protein Transports substances across membrane.
Selective Permeability Allows some substances through, blocks others.
Concentration Gradient Difference in concentration across a membrane.
Passive Transport Movement without energy.
Diffusion Movement from high to low concentration.
Facilitated Diffusion Diffusion using a transport protein.
Osmosis Diffusion of water across a membrane.
