[Wozadlo- Biology] Chapter 7: Cell Structure and Function

21 terms by jgagarin96

Create a new folder

Advertisement Upgrade to remove ads

Covers osmosis, diffusion, hypotonic, hypertonic, isotonic, tonicity, passive transport, active transport, etc. ***THIS IS ONLY SECTION 3

diffusion

movement of particles (gas, liquid, solid) from a region of high concentration ([ ]) to a region of low concentration

equilibrium

When the [ ] of the molecules of a substance is the same throughout a space

osmosis

diffusion of water across a semipermeable membrane, from an area of greater [ ] to an area of lesser [ ]

tonicity

relative solute concentration of 2 fluids

hypotonic

having fewer solutes; more water

isotonic

equal amounts of solute and water

hypertonic

having more solutes; less water

turgor pressure

the amount of water in a plant cell;
water enters >> high _______ >> cell rigid
water leaves >> low ________>> cell shrinks

plasmolysis

plant cells result in shrinking due to hypotonic conditions

cytolysis

animal cells result in swelling due to hypotonic conditions

concentration gradient

the difference in [ ] of a substance across a space

contractile vacuole

cavity in the cytoplasm of some protists that collects water and discharges it from the cell

faciliated diffusion

diffusion through transport or carrier proteins; no nrg is required and it works in either direction

gated channels

proteins that allow charged atoms through a cell

passive transport

this does not require energy inout from a cell; two types are diffusion and osmosis

active transport

this requires energy input from a cell and enables a cell to move a substance against its concentration gradient; is powered by chemical energy (ATP); occurs through transport protein pumps

sodium-potassium pump

3 Na ions with a cell are exchanged for 2 K ions outside the cell; causes build up of positive electrical charges on outside of the cell creating membrane potential, which is needed for nerve impulses to operate

endocytosis

process of taking material into the cell

exocytosis

process of expelling material from the cell

phagocytosis

process in which extensions of cytoplasm surround and engulf large particles and take them into the cell; type of endocytosis

pinocytosis

process by which a cell takes in liquid from the surrounding environment; type of endocytosis

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set