BIO 111 EXAM 2 UPDATED ACTUAL Questions And Correct Answers
Terms in this set (114)
Plasma Membrane *structural support and protection, selectively permeable
*cell communication, adhesion, and recognition
Components of Plasma Membrane phospholipids, cholesterol, proteins, carbohydrates
Selectively Permeability allows some substances to cross but not others, depending on charge and size
Phospholipid main fabric of plasma membrane, bilayer
, Amphipathic having both a hydrophilic region and a hydrophobic region
Integral Proteins proteins implanted within lipid bilayer of plasma membrane
Peripheral Proteins bound to the surface of the plasma membrane
Glycoproteins attach to proteins
Glycolipids attach to phospholipids
Crabohydrates in Plasma Membrane found outside, cell recognition
Cholesterol in Plasma Membrane only in animal cells, temperature buffer, in between phospholipids
Endomembrane System plasma membrane, nucleus, rough and smooth ER, vesicles, golgi apparatus,
lysosomes
Passive Transport no energy required
simple diffusion, fascillitated diffusion, osmosis
Active Transport requires energy
Primary Active Transport, Secondary Active Transport, Bulk Transport
Factors Affecting Plasma Membrane Fluidity temperature, mosaic nature, fatty acid composition
Diffusion no energy required, substances move down concentration gradient until dynamic
equilibrium is reached
Facilitated Diffusion no energy required, high to low concentration, but need the help of a protein
Channel Protein a protein that allows the transport of specific substances across a cell membrane
Carrier Protein a transport protein, that holds onto molecules and changes their shapes in a way
that shuttles them across the membrane.
Osmosis *diffusion of water across a semi-permeable membrane
*solute cannot cross membrane, water moves toward higher concentration of
solute
Tonicity ability of a solution to cause a cell to gain or lose water by osmosis, significant
impact on cells without a cell wall
Hypotonic Having a lower concentration of solute than another solution (if the cell is
hypotonic, the cell will shrink)
Isotonic when the concentration of two solutions is the same
Hypertonic Having a higher concentration of solute than another solution (if the cell is
hypertonic, the cell will swell)
Terms in this set (114)
Plasma Membrane *structural support and protection, selectively permeable
*cell communication, adhesion, and recognition
Components of Plasma Membrane phospholipids, cholesterol, proteins, carbohydrates
Selectively Permeability allows some substances to cross but not others, depending on charge and size
Phospholipid main fabric of plasma membrane, bilayer
, Amphipathic having both a hydrophilic region and a hydrophobic region
Integral Proteins proteins implanted within lipid bilayer of plasma membrane
Peripheral Proteins bound to the surface of the plasma membrane
Glycoproteins attach to proteins
Glycolipids attach to phospholipids
Crabohydrates in Plasma Membrane found outside, cell recognition
Cholesterol in Plasma Membrane only in animal cells, temperature buffer, in between phospholipids
Endomembrane System plasma membrane, nucleus, rough and smooth ER, vesicles, golgi apparatus,
lysosomes
Passive Transport no energy required
simple diffusion, fascillitated diffusion, osmosis
Active Transport requires energy
Primary Active Transport, Secondary Active Transport, Bulk Transport
Factors Affecting Plasma Membrane Fluidity temperature, mosaic nature, fatty acid composition
Diffusion no energy required, substances move down concentration gradient until dynamic
equilibrium is reached
Facilitated Diffusion no energy required, high to low concentration, but need the help of a protein
Channel Protein a protein that allows the transport of specific substances across a cell membrane
Carrier Protein a transport protein, that holds onto molecules and changes their shapes in a way
that shuttles them across the membrane.
Osmosis *diffusion of water across a semi-permeable membrane
*solute cannot cross membrane, water moves toward higher concentration of
solute
Tonicity ability of a solution to cause a cell to gain or lose water by osmosis, significant
impact on cells without a cell wall
Hypotonic Having a lower concentration of solute than another solution (if the cell is
hypotonic, the cell will shrink)
Isotonic when the concentration of two solutions is the same
Hypertonic Having a higher concentration of solute than another solution (if the cell is
hypertonic, the cell will swell)
