Movement of Substances across the cell membrane Flashcards
occurs spontaneously without energy
passive transport
requires energy in the form of ATP
active transport
without the influence of outside forces, substances tend to move down their concentration gradient toward –
equilibrium
the interior of the plasma membrane (cytoplasmic side) has a – potential when compared to the exterior face of the membrane (extracellular side)
negative
diffusion is the movement of – down their concentration gradients
small solutes
diffusion is a slow process by nature but its rate can be influenced by temperature, size of the molecule attempting to diffuse, and how large the – is
concentration gradient
T/F: diffusion continues until equilibrium is met
true
specific type of diffusion in which the substance moving down its concentration gradient is water
osmosis
osmosis will occur if the solute itself is unable to cross the cell membrane itself because it is too –
large
when the concentrations of solutes inside and outside the cell are equal, the solutions are termed – and there will be no net movement of water into or out of the cell
isotonic
solution that has more water and less solute relative to what it is being compared to is termed
hypotonic
solution that has less water and more solute relative to what it is being compared to is termed
hypertonic
when cells are placed in – solutions, water will leave the cells via osmosis which cause the cells to shrivel
hypertonic
cells placed in – solutions will gain water and may swell and burst
hypotonic
used to bring in large items
endocytosis
