Cell membrane

Question 1

What makes up the cell membrane

Answer 1

phospholipids, proteins, sugar, cholesterol

Question 2

Lipid functions

Answer 2

energy storage, water proofing, chemical messengers, make up cell membranes

Question 3

Two parts of a lipid

Answer 3

glycerol and fatty acid

Question 4

Steroid

Answer 4

lipid that is nonpolar, can be chemical messengers

Question 5

Cholesterol

Answer 5

(steroid) helps maintain structure of animal cell membrane.

prokaryotes and plants don’t have cholesterol in their cell membranes

Question 6

Proteins can be…

Answer 6

receptors-receiving signals
transport proteins- move molecules across the membrane
channels- act as doorways
glycoproteins- act as ID tags

Question 7

what things are allowed inside the cell membrane

Answer 7

small hyrdrophobic molecules

small uncharged molecules

Question 8

what things are not allowed inside the cell membrane

Answer 8

ions, large or polar molecules

Question 9

concentration gradient

Answer 9

unequal distribution of particles in a given space

Question 10

molecules naturally move from…

Answer 10

high to low concentration

Question 11

diffusion

Answer 11

movement of any particle from high to low concentration

-small, non-polar, and uncharged molecules can diffuse across the cell membrane

Question 12

osmosis

Answer 12

(type of diffusion)

movement of water from high to low concentration across a membrane

Question 13

facilitated diffusion

Answer 13

movement of particles from high to low concentration across membrane with aid of membrane transport

• larger or charged particles
• requires protein channel