Unit 1b bio

Question 1

cell membrane is list

Answer 1

fluid, mosiaic, fezxiable, self-sealing, nd selectly permeable

Question 2

cell membrane function

Answer 2

slectly permeable, contrlas and regulates mataterials to maintain homeostaiss in the cell

Question 3

structure of cell membrane

Answer 3

-phsopolipid bilayer
- embededd with channel proteins
- cholestrol molecules are interspead
- carb chains are attched to porteins and lipds as receptor molecules.

Question 4

lipid in membrane head

Answer 4

made of phospate, polar, like water, hydrophilic

Question 5

lipid in membrane tail

Answer 5

made of fattly acid, nonpolar, dilikes water, hydrophobic

Question 6

what can pass through lipid bilayer

Answer 6

small, non-charged molecules, nonpolar

Question 7

what can not pass through lidid bilayer

Answer 7

large and chared molecluel, polar

Question 8

carbohydrate molecules

Answer 8

attached t poteins help with cell to cell communication

Question 9

proteins

Answer 9

imbedded in the lipid bilayer. proteins channels allows large molecules in and out.

Question 10

out of membrane

Answer 10

waste and products

Question 11

in membrane

Answer 11

water, oxygen, sugras, fats, proteins, salts

Question 12

solvent

Answer 12

water

Question 13

solute

Answer 13

the molecule in water

Question 14

solvent + solute

Answer 14

solution

Question 15

passive transport

Answer 15

high to low concentration, no energy needed, incuded simple diffusion, facilitated diffusion, and osmosis, works along the gradient

Question 16

active transport

Answer 16

low to high concentration, ATP needed, agaist the gradience. requrires porteins or veseciles

Question 17

simple diffusion

Answer 17

movemnt of molecules that are non polar. simply goes in and out of membrane. until evenly distirbuted. Passive. no energy

Question 18

facilitated diffusion

Answer 18

movemnt of large polar molecules from high to low concentration though protein channels.
no enenryg. passive

Question 19

osmosis

Answer 19

water siffusisn from high to low. uses special porteins called aquporines. passive

Question 21

hypertonic solution

Answer 21

lots of water in cell, less outside. Net flow going out of cell , shrinks, loose mass. Plant cells will become plasmalysc.

Question 22

hypotonic solution

Answer 22

less water in cell, lot outside. Net flw inot cell. cell swell, burst, gain mass. Plant cells call it trugid.

Question 23

Isotonic

Answer 23

equal amout of water. Water going in and out evenly in both directions. called equalibrium. plant cells call it staying flaccid. keep shape.

Question 24

animal cells best in

Answer 24

Isotonic

Question 25

plant cells best in

Answer 25

Hypotonic , where tugor pressure the highest

Question 26

protein pumps

Answer 26

enables cell to move substances aginst gradience. used by ATP.

Question 27

sodium postsim pump.

Answer 27

sodium pumped out of cell, potasissum pumped in. goes agaisnt gradience. low to hight

Question 28

bulk transport - endocyotosis

Answer 28

usses veseciles to import materilas. need atp

Question 29

bulk transport - exocytosis

Answer 29

usess vesicals to export materials. need atp

Question 30

osmoregulation

Answer 30

how living things control the balence of water and slats in body, to do this use osmosis.