unit 4

Question 1

another word for the cell membrane

Answer 1

plasma membrane

Question 2

what does a cell membrane do

Answer 2

protects/surrounds the cell and controls what enters and leaves the cell

Question 3

what goes into cells

Answer 3

water, sugar, oxygen, amino acids

Question 4

what goes out of cells

Answer 4

water, co2, amino acids, wastes

Question 5

what does the cell membrane help maintain

Answer 5

homeostasis

Question 6

what is homeostasis

Answer 6

the process of maintaining balance in a cell

Question 7

what are examples of our bodies maintaining homeostasis

Answer 7

sweating/shivering

Question 8

what are the parts of a plasma membrane

Answer 8

phospholipids, cholesterol, carbohydrates, proteins

Question 9

what are the vast majority of cell membranes made of

Answer 9

phospholipids

Question 10

are the heads of phospholipids polar or nonpolar

Answer 10

polar

Question 11

what is the fluid mosaic model

Answer 11

a model of the cell membrane

Question 12

what does cholesterol do in the bilayer

Answer 12

keeps phospholipids from sticking together and maintains flexibility

Question 13

what do carbohydrates do in the bilayer

Answer 13

identify cells

Question 14

transport proteins

Answer 14

move molecules in and out of the cell

Question 15

receptor proteins

Answer 15

what a molecule binds to, also helps to send messages

Question 16

which part of the bilayer is hydrophillic

Answer 16

heads

Question 17

what kind of environment do cells live in

Answer 17

liquid

Question 18

channel proteins

Answer 18

only let specific moleculed thru

Question 19

exocytosis

Answer 19

moves molecules out of the cell and vacuoles fuse with cell membrane

Question 20

endocytosis

Answer 20

moves large molecules into the cell and cell membrane forms a vacuole around the molecules to carry

Question 21

how to calculate surface area of a cube

Answer 21

length x height x 6

Question 22

how to calculates volume of a cube

Answer 22

l x w x h