The Cell Membrane (Unit 3 - Part 1)

Question 1

1 or more cells compose..

Answer 1

all living things (part of the cell theory)

Question 2

cells are the basic unit of..

Answer 2

structure and function in living things (part of the cell theory)

Question 3

cells functions are based on..

Answer 3

their size and shape (part of the cell theory)

Question 4

cell division

Answer 4

a process in which all cells come from other cells (part of the cell theory)

Question 5

What cell most not have come from a cell?

Answer 5

the very first cell ever to exist (exception to the cell theory)

Question 6

Viruses are

Answer 6

smaller than cells and maybe even alive (exception to the cells theory)

Question 7

cell membrane

Answer 7

thin outer covering

Question 8

a cell membrane..

Answer 8

-defines the boundary of the cell
-regulates the movement of chemicals in and out of the cell

Question 9

DNA

Answer 9

genetic material that gives organisms directions on how to make and use materials needed for life processes

Question 10

cytoplasm

Answer 10

region of the cell between the nucleus and the cell membrane

Question 11

cytoplasm is made mostly of..

Answer 11

water

Question 12

the cell membrane is made of 2 layers of

Answer 12

mostly lipids and some proteins embedded

Question 13

regulation

Answer 13

maintains a stable environment for a cell

Question 14

selectively permeable membrane (SPM)

Answer 14

lets in some materials but not others

Question 15

semi permeable

Answer 15

things can pass through

Question 16

receptors

Answer 16

some proteins in a cell membrane that respond to chemical messengers and cause changes in the cell

Question 17

transporters

Answer 17

some proteins in a cell membrane that act as passageways for certain materials to move through

Question 18

one function of proteins in the cell membrane is..

Answer 18

communication

Question 19

communication

Answer 19

helps cells recognize each other

Question 20

What impacts how a particle can move through a cell membrane?

Answer 20

size

Question 21

small molecules…

Answer 21

enter cells easily

Question 22

large molecules…

Answer 22

DON’T enter cells easily

Question 23

diffusion

Answer 23

when particles move passively from an area of high to an area of low concentration

Question 24

equilibrium

Answer 24

the concentration of a substance is the same throughout an area or on both sides of a cell membrane

Question 25

concentration gradient

Answer 25

when the concentration of a substance is different on either side of a membrane

Question 26

Does passive transport need energy?

Answer 26

no

Question 27

passive transport

Answer 27

when materials move from high to low concentration across a semipermeable CELL MEMBRANE

Question 28

Does diffusion need energy?

Answer 28

no

Question 29

osmosis

Answer 29

the diffusion of water across a membrane and it is essential for life

Question 30

water always moves from a...

Answer 30

high to low concentration

Question 31

-when placed in pure water, cells... -this happens because..

Answer 31

-swell and burst -too much water goes into the cells

Question 32

-when placed in salt water, cells... -this happens because

Answer 32

-shrink and shrivel -too much water diffuses out of the cell

Question 33

-plant cells will not/will (choose one) burst like animal cells because they have a..

Answer 33

-not -cell wall as well as a membrane

Question 34

-when placed in salt water, ONLY a PLANTS cell...

Answer 34

membrane shrivels but there cell wall does not

Question 35

active transport

Answer 35

when materials move from low to high concentration across a semipermeable cell membrane, against or up a concentration gradient

Question 36

Does active transport need energy?

Answer 36

yes

Question 37

Does active transport allow for large molecules to enter the cell membrane that could not though diffusion?

Answer 37

yes

Question 38

active transports uses ___ proteins in the cell membrane

Answer 38

transport

Question 39

active transport allows cells to maintain special...

Answer 39

concentrations

Question 40

the two types of active transport are..

Answer 40

endocytosis and exocytosis

Question 41

endocytosis

Answer 41

particles are engulfed into the cell when the cell membrane pinches in resulting in a vesicle (small organelle)

Question 42

endo=

Answer 42

enters

Question 43

exocytosis

Answer 43

particles move out of the cell

Question 44

exo=

Answer 44

exit