Biology 121 Chapter 5 Exam Questions
with Correct Answers
simple diffusion - ANSWER-substances move down concentration gradients accros
a membrane
facilitated diffusion - ANSWER-use specialized water channel proteins (Aquaporins)
osmosis - ANSWER-diffusion of water across selectively permeable membranes
aquaporin - ANSWER-specialized water channels
isotonic - ANSWER-have equal concentrations of water and concentration of
dissolved substances
hypertonic - ANSWER-greater solute concentration
hypotonic - ANSWER-lower solute concentration
endocytosis - ANSWER-engulfs particles or fluids
- 3 types
1. pinocytosis
2. receptor-mediated endocytosis
3. phagocytosis
exocytosis - ANSWER-moves material out of cell
phagocytosis - ANSWER-engulfs large particles
receptor mediated endocytosis - ANSWER-engulfs specific molecules
pinocytosis - ANSWER-engulfs liquid
desmosomes - ANSWER-attach cells together
tight junctions - ANSWER-make cell attachments leakproof
gap functions - ANSWER-allow direct communication between cells - animal cells
plasmodesmata - ANSWER-allow direct communication between cells - plant cells
functions of plasma membrane - ANSWER--separate 2 aqueous environments
- regulate the passage of materials between the two aqueous environments
- serve as the site for various biochemical functions
- allow communication between cells
with Correct Answers
simple diffusion - ANSWER-substances move down concentration gradients accros
a membrane
facilitated diffusion - ANSWER-use specialized water channel proteins (Aquaporins)
osmosis - ANSWER-diffusion of water across selectively permeable membranes
aquaporin - ANSWER-specialized water channels
isotonic - ANSWER-have equal concentrations of water and concentration of
dissolved substances
hypertonic - ANSWER-greater solute concentration
hypotonic - ANSWER-lower solute concentration
endocytosis - ANSWER-engulfs particles or fluids
- 3 types
1. pinocytosis
2. receptor-mediated endocytosis
3. phagocytosis
exocytosis - ANSWER-moves material out of cell
phagocytosis - ANSWER-engulfs large particles
receptor mediated endocytosis - ANSWER-engulfs specific molecules
pinocytosis - ANSWER-engulfs liquid
desmosomes - ANSWER-attach cells together
tight junctions - ANSWER-make cell attachments leakproof
gap functions - ANSWER-allow direct communication between cells - animal cells
plasmodesmata - ANSWER-allow direct communication between cells - plant cells
functions of plasma membrane - ANSWER--separate 2 aqueous environments
- regulate the passage of materials between the two aqueous environments
- serve as the site for various biochemical functions
- allow communication between cells
