bio 12 quiz osmosis
what is osmosis?
osmosis is the diffusion of WATER through a semi permeable membrane from low concentration to high concentration.
what does diffusion mean?
diffusion is a solute (salt suger) moving from a high concentrate to a low concentrate
is osmosis and diffuison passive or actice?
both of these transports are passive trnsport meaning they do not require energy or ATP
what is ATP
a broken down glucose molecule that are little packets of energy
what does isotonic mean?
isotonic means that the environment inside and outside of the cell are the same/similar and so water can flow in and out and the cell remains the SAME
what does hypertonic mean?
hypertonic means that there is more solute than water and so causes the cell to shrink in size which is also called crenate
what does hypotonic mean?
hypotonic means that there in more water than solute in the cell and so this pushes the cell outward which causes it to bulge, we call this pressure turger pressure
why does adding water to a wilted ppant help it stand up?
when you water a wilted plant it helps restore the pants tergidity which makes it perk up and stand up firmly.
what does tonicity mean?
tonicity is the ability for a sultion to change the volume of cell by altering the water content
why is it important for IV's to be isotonic?
because the soltuion must be a similar concentration to the blood so that your body does not reject it and lets it replace liquid and allow the fluid into cells
what does Glycocalyx do?
cell communication, holds cells together and cell recognition
what are the two passive transport protiens?
chanel which lets the protein right through and carrier which envelops the protien then brings it through and releases it inside
what is the one active transport?
potassium and sodium pump protein which exchanges sodiums for potassiums inside the cell
pinotocis
Pinocytosis
A cell takes in extracellular fluids and small molecules through a process known as "cell drinking". Pinocytosis is a continuous process in most cells.
phagtosic
Phagocytosis
A cell engulfs large particles, such as cell debris and microorganisms, through a process known as "cell eating"
distilled water is.....
hypotonic
endo vx exocytosis
Endocytosis is the process of taking in material by enclosing it in a vesicle. Exocytosis is the opposite process, where the vesicle fuses with the plasma membrane and expels its contents to the outside of the cell.
what does lysis mean
to break up