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Flashcards in Plasma Membrane Deck (14)
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plasma membrane

forms the cells flexible outer surface, separating the cells internal environment from the external environment
controls passage of materials into and out of the cell

1

permeable membrane

open to passage or penetration of substances

2

selectively permeable membrane

allows the entrance and exit of some substances

3

cell membrane

includes protein, lipid, and carbohydrate molecules
heads of the molecule (hydrophilic - water soluble)
tails of the molecule (inhydrophili - insoluable in water

4

simple diffusion

random movement of substances from region of higher concentration to that of lower concentration

5

facilitated diffusion

movement of substances from region of higher concentration to that of lower concentration by carrier molecules

6

osmosis

H2O molecules moves from higher to lower concentration across selectively permeable membranes

7

active primary transport

energy from hydrolysis of ATP is used by carrier proteins to move solutes across membrane

8

active secondary transport

indirectly uses energy obtained from the hydrolysis of ATP

9

endocytosis

receptor mediated
membrane engulfs selected molecules combined with receptor protein

10

phagocytosis

cells take in solid
important line of defense against invasion of disease-causing microorganisms

11

bulk phase endocytosis

also called pinocytosis
cells take in tiny droplets of liquid
liquid becomes part of the cytoplasm

12

exocytosis

reverse of endocytosis
vesicles fuse with membranes and release contents outside of the cell

13

transcytosis

movement resulting from endocytosis on one side and exocytosis on the other