Bio Lab Exam 2 Flashcards
osmosis
movement of solvent or water and the movement across a semipermeable membrane toward a higher concentration of solute.
diffusion
the net movement of anything from a region of higher concentration to a region of lower concentration.
hypotonic
0% NaCl
- concentration HIGHER inside membrane
- concentration in cell is BIGGER than concentration outside cell
- water moves into cell because there is more water inside
isotonic
0.9% NaCl
- equal concentration
- concentration inside cell = concentration outside cell
- equal movement across membrane
- water is moving in and outside because there is a same amount of salt inside and outside
hypertonic solution
10% NaCl
- concentration lower inside membrane
- concentration in cell is smaller than outside of cell
- water moves out of the cell
- more salt outside and most water inside so water will want to move outside
plants are better off not drinking water because
the cell wall shrinks and protects them dye to hypertonic solution
what would happen to a fish in hypnotic solution?
they would explode because hypotonic means water moves into a cell because there is more water within ut
what is an example of diffusion?
what is an example of osmosis
diffusion: perfume sprayed and how it will diffuse throughout a room
osmosis: absorption of water by plant roots from the soil.
what are the variables to consider for rate of diffusion?
temperature and molecular weight
producers are
autotrophs»_space; take solar energy and turn into energy they can use
ATP
adenosineTRIphosphate
energy is stored in 3rd molecule
fermentation in yeast
produces alcohol
phenol red
- is red/pink –> yellow/orange
- depends on acidic content
- see if plants produced O2 because it changes color when CO2 is present
- we can see if CO2 is present because of bubbles or color change to yellow/orange
your genes are
50% you
50% junk dna (which isn’t junk because it influences the other 50% (health and disease)).
dna is found in the nucleus so
dna replication occurs here too
