Cell Membrane and Cell Wall Function

Question 1

definition of cell membrane

Answer 1

thin layer seperating contents from outside cell

Question 2

definition of diffusion

Answer 2

particle move from area of higher concentration to area of lower concentration so that all particles are equal

Question 3

definition of solute

Answer 3

particles dissolved in water

Question 4

definition of solvent

Answer 4

liquid that dissolves solute

Question 5

definition of osmotic pressure

Answer 5

pressure, due to flow of H2O from area of higher concent. to area of lower concent.

Question 6

definition of isotonic solution

Answer 6

same strength solution

Question 7

definition of hypertonic solution + what does it do

Answer 7

greater strength solution (takes away water from cell)

Question 8

definition of hypotonic solution

Answer 8

lower concentration of solute, which means higher concentration of water

Question 9

definition of plasmolysis

Answer 9

when plant cell shrinks (too little h2o)

Question 10

definition of turgor pressure

Answer 10

when plant cell swells up on itself

Question 11

definition of facilitated transport + which way on concent. gradient

Answer 11

passes 1 type of molec in and out of cell, it passes down on the concentration gradient (no energy required)

Question 12

definition of crenation

Answer 12

animal cell shrinks (loses h2o)

Question 13

definition of active transport + which way on cencent. gradient

Answer 13

move molecs from area of lower concent to area of higher concent, it requires energy (against concent gradient)

Question 14

definition of endocytosis

Answer 14

cell membrane forms vessicle around substance to be taken into cell

Question 15

definition of phagocytosis

Answer 15

endocytosis of larger particles

Question 16

definition of pinocytosis

Answer 16

endocytosis of smaller particles

Question 17

definition of exocytosis

Answer 17

vacuole(vessicle) fuses with cell membrane and substances leave cell

Question 18

definition of glycolipid

Answer 18

carbs strung in chains attatched to lipids on membrane

Question 19

definition of fluid mosaic model

Answer 19

model of cell memb. 2 phospholipid layers with proteins (selectively permeable)

Question 20

what is osmosis

Answer 20

movement of water from area of higher concentration to area of lower concentration, across selectively permeable membrane

Question 21

what happens to animal cell in hypertonic solution

Answer 21

hemolysis (cell bursts)

Question 22

what happens to animal cell in hypotonic solution (what is process called)

Answer 22

crenation (cell shrinks)

Question 23

turgor pressure is best exemplified by placing a plant cell in a

Answer 23

hypotonic solution

Question 24

3 facts about active transport that differ from facilitated transport

Answer 24

-requires energy (ATP)
-moves against concent gradient
-not highly specific

Question 25

3 facts about facilitated transport that differ from active transport

Answer 25

-no energy req (no ATP)
-highly specific
-moves down concent gradient

Question 26

(T or F) salt can move in and out of cell

Answer 26

F

Question 27

(T or F) if a cell uses active transport to take in salt, then osmosis will follow and water will enter the cell

Answer 27

T

Question 28

An animal cell will take in water when placed in a ________ solution

Answer 28

hypotonic

Question 29

definition of concentration gradient

Answer 29

The difference in concentration of a particle b/w two areas