Ch4 Biology Vocab Flashcards
things that can cause disruptions in homeostasis
stressors
movements of molecules across a membrane without the use of energy
passive transport
(molecules move “down” a concentration gradient)
cell part that can kill bacteria and viruses
lysosome
a membrane’s ability to allow some molecules to cross while blocking others
selectively permeable
(selective permeability)
a solution in which the concentration of solutes outside the cell is LESS than the concentrations of solutes inside the cell
hypotonic solution
(hypo = under, less)
process by which molecules move from an area where they are more concentrated to where they are less concentrated
diffusion
group of organs that work together to perform a common function
organ system
(all organ systems are invovled in exchanging materials between different parts of the body)
observations that involve descriptions;
observations that are relative; subjective
qualitative observations
compartment within cells that perform specific functions
organelle
choosing ones behavior in order to minimize a stressful external situation
behavioral response example: seeking shelter from extreme heat or cold
all factors that might affect the outcome of an experiment
variables
(good controlled experiments only test ONE variable at a time)
observations that can be measured
quantitative observations
(think quantity)
a solution in which the concentration of solutes outside the cell EQUALS the concentration of solutes inside the cell
isotonic solution
(iso = equal)
a solution in which the concentration of solutes outside of the cell is GREATER than the concentration of solutes inside the cell
hypertonic solution
(hyper = over, more)
uniform mixture of 2 or more substances
solution
(solute: gets dissolved)
(solvent: does the dissolving)