unit 4 test

Question 1

cell membrane

Answer 1

surrounds the cell and provides boundary

Question 2

homoestasis

Answer 2

the proccess of maintaining (balancing) the cells enviroment

Question 3

What is most of the cell membrane made of?

Answer 3

phospholipid bilayer. Hydrophilic heads and hydrophobic tails.

Question 4

fluid mosaic model

Answer 4

the membrane is fexible, and is made of many parts

Question 5

cholesterol

Answer 5

keeps the phospholipids from sticking together, keeps the membrane fexible

Question 6

carbohydrates

Answer 6

the sugar on the outside of the cell allows the cell to be identified, and is part of the glyoprotein.

Question 7

transport proteins

Answer 7

move molecules into and out of the cell

Question 8

receptor proteins

Answer 8

help cell communicate, molecules bind to this protein

Question 9

Diffusion

Answer 9

movement of particles from high to low concentration

Question 10

equilibrium

Answer 10

a state where the distribution of molecules is balanced

Question 11

facilitated diffusion

Answer 11

process where large molecules are moved in and out of the cell using protein channels

Question 12

simple diffusion

Answer 12

molecules that move straight thourgh the cell membrane

Question 13

Osmosis

Answer 13

The diffusion of water across the the cell membrane

Question 14

aquaproins

Answer 14

special proteins that move water across the cell membrane

Question 15

Isotonic solution

Answer 15

Equal concentration of solute in and out of the cell
- Water will not move

Question 16

Hypotonic solution

Answer 16

less solute concentration outside the cell
- water will move into the cell

Question 17

hypertonic solution

Answer 17

more solute concentration outside the cell
- Water will move out of the cell

Question 18

Osmotic pressure

Answer 18

what causes cells or shrink or burst

Question 19

Passive transport

Answer 19

No additional energy needed
- Molecules will always move from high to low concentration

Question 20

active transport

Answer 20

additional ATP energy needed
- Molecules always move from low to high concentration

Question 21

Carrier proteins

Answer 21

changes it shape to bind to a molecule to move that molecule across the membrane

Question 22

Exocytosis

Answer 22

Moves large molecule out of cell, the vacuole will fuse with the cell membrane

Question 23

Endocytosis

Answer 23

moves large molecules into the cell, vacuole will from around the molecule