Cell Membrane and Transport

Question 1

the ____ model is used to describe the structure of the cell membrane

Answer 1

fluidmosaic

Question 2

a form of endocytosis where smaller substances are brought into the cell by forming vesicles at the cell membrane

Answer 2

pinocytosis

Question 3

transport via proteins requires no energy input

Answer 3

facilitated

Question 4

the _____ gland requires the active transport of iodine out of the blood and into its cells

Answer 4

thyroid

Question 5

a membrane is said to be _______ permeable if it lets so me things pass through it, but does not allow other things to pass

Answer 5

selectively

Question 6

the movement of a vacuole out of a cell

Answer 6

exocytosis

Question 7

a homogenous mixture where one substance is dissolved in another

Answer 7

solution

Question 8

a type of endocytosis where larger substances are brought into the cell by forming vacuoles at the cell membrane

Answer 8

phagocytosis

Question 9

receptor- _________ endocytosis occurs when a substance binds to a receptor protein and causes another substance to be taken into the cell via vesicle formation

Answer 9

mediated

Question 10

if a plant cell is placed in a hypertonic solution, _____ may occur

Answer 10

plasmolysis

Question 11

if an animal cell is placed in a hypertonic solution ____ may occur

Answer 11

crenation

Question 12

when an animal cell is placed in a hypotonic solution ______ may occur

Answer 12

lysis

Question 13

the sodium / potassium pump is found in large numbers in these kind of cells

Answer 13

nerve

Question 14

carrier proteins are ____ meaning they only carry one type of particle

Answer 14

specific

Question 15

refers to a solution that is less concentrated when compared to another solution

Answer 15

hypotonic

Question 16

the substance that does the dissolving in a solution

Answer 16

solvent

Question 17

______ sized molecules tend to produce a higher rate of diffusion

Answer 17

smaller

Question 18

________ proteins catalyze chemical reactions to the cell membrane

Answer 18

enzymatic

Question 19

______ proteins cause a change to the cell membrane when a specifically shaped molecule binds its binding site

Answer 19

receptor

Question 20

the diffusion rate can be increased by reaching the ____ which in turn increases the speed at which particles are moving

Answer 20

teperature

Question 21

active transport is able to move molecules ____ the concentration gradient

Answer 21

against

Question 22

when solution on either side of a membrane are the same concentration there is _____ net movement of water or solute across the membrane

Answer 22

no

Question 23

turgor pressure is important to plant cells because as their cells start to lose turgor pressure the plant will start to

Answer 23

wilt

Question 24

the substance that is being dissolved in the solution

Answer 24

solute

Question 25

a ______ protein uses ATP to change shape to move molecules across the cell membrane

Answer 25

carrier

Question 26

this is a special type of of diffusion where water is the substance that is moving

Answer 26

osmosis

Question 27

water fearing

Answer 27

hydrophobic

Question 28

a solution that is the same concentration compared to another solution

Answer 28

isotonic

Question 29

a _____ protein only passes part way through the lipid bilayer of the cell membrane

Answer 29

peripheral

Question 30

this type of protein transport requires ATP as an energy source

Answer 30

active

Question 31

a carbohydrate chain attached to a lipid molecule in the cell membrane

Answer 31

glycolipid

Question 32

water loving

Answer 32

hydrophilic

Question 33

the rate of diffusion can be increased by increasing the _____ gradient

Answer 33

concentration

Question 34

this occurs when there is a concentration gradient across a membrane and only water is able to pass through the membrane

Answer 34

osmotic pressure

Question 35

a cell _____ protein has glycoproteins attached to it which are unique to each organisms and aid in immune system recognition

Answer 35

recognition

Question 36

this molecule is the energy currency of the cell

Answer 36

ATP

Question 37

movement of molecules along a concentration gradient

Answer 37

diffusion

Question 38

a carbohydrate chain attached to a protein to a protein in the cell membrane

Answer 38

glycoprotein

Question 39

the movement of a vacuole into the cell

Answer 39

endocytosis

Question 40

an ____ protein passes all the way through the bilayer of the cell membrane

Answer 40

integral

Question 41

refers to a solution that is more concentrated when compared to another solution

Answer 41

hypertonic

Question 42

when movement of molecules does not require additional energy input, it is called _____

Answer 42

passive

Question 43

if a plant cell is placed in a hypotonic solution, an increase in ____ pressure will develop

Answer 43

turgor

Question 44

a _____ protein allows a particular ion or molecule to pass through it with the concentration gradient and without the use of ATP

Answer 44

channel