Phospholipid Bi-Layer & Cell Transport

Question 1

What is the function of the phospholipid bi-layer?

Answer 1

It regulates what enters and exits the cell and maintains homeostasis

Question 2

Define semi-permeable

Answer 2

Only certain things can get through it, (usually based on size)

Question 3

What are the two parts of a phospholipid?

Answer 3

The polar head and the non polar tails

Question 4

True or false: The head of a phospholipid is non-polar?

Answer 4

FALSE

Question 5

Define hydrophillic

Answer 5

loves water, water is polar and it gets along with the polar heads

Question 6

Define hydrophobic

Answer 6

doesn’t like water, tails are nonpolar and hydrophobic

Question 7

Because molecules have energy, what do they want to do?

Answer 7

spread out and reach an equilibrium

Question 8

What is the difference between a solvent and a solute?

Answer 8

Solvent is what does the dissolving, solute is the molecule that gets dissolved.

Question 9

Identify the solute and solvent in salt water

Answer 9

Solute= salt Solvent=water

Question 10

What is the difference between passive and active cell transport?

Answer 10

Passive cell transport does not require energy, Active does

Question 11

Which cell transport goes from high to low concentration?

Answer 11

Passive

Question 12

Which cell transport uses energy?

Answer 12

Active

Question 13

What does it mean for a transport to move with its gradient?

Answer 13

It moves in the most natural way, from high to low concentration

Question 14

Which cell transport goes against its gradient?

Answer 14

Active

Question 15

Name the three types of passive transport

Answer 15

1. Diffusion 2. Osmosis 3. Facilitated diffusion

Question 16

What molecule can move through anything?

Answer 16

Water (H2O)

Question 17

What five things affect the rate of diffusion?

Answer 17

temperature, concentration, surface area, time, and pressure

Question 18

Water, Carbon Dioxide, and Oxygen can all do what in terms of diffusion?

Answer 18

They can all travel through the phospholipid bilayer

Question 19

How are diffusion and osmosis different?

Answer 19

Osmosis is the diffusion of water

Question 20

Name three types of osmosis

Answer 20

Hypertonic, Hypotonic, Isotonic

Question 21

Where is the concentration of water largest in a hypertonic solution?

Answer 21

Inside of the cell

Question 22

Why does the cell shrink in a hypertonic solution?

Answer 22

The water from inside the cell exits to create an equilibrium with the solution

Question 23

True or false: the concentration of water is larger in the solution than the cell in a hypotonic situation

Answer 23

TRUE, because of this, it moves into the cell to create an equilibrium

Question 24

What happens in an Isotonic solution?

Answer 24

Nothing, the concentrations are already equal

Question 25

What is the helper in facilitated diffusion?

Answer 25

The protein channel, it fits bigger molecules

Question 26

What is the type of energy used in active transport?

Answer 26

ATP

Question 27

Name three types of active transport

Answer 27

endocytosis, exocytosis, and Sodium Potassium Pump

Question 28

True or false: endocytosis takes place outside of the cell

Answer 28

FALSE, exocytosis takes place outside of the cell

Question 29

What organell fuses with a membrane in active transport?

Answer 29

Vesicle

Question 30

Why do cells want to be small?

Answer 30

It makes it easier to maintain homeostasis

Question 31

Does the cell membrane represent surface area or volume?

Answer 31

Surface area, cytoplasm represents the volume

Question 32

True or false: Volume increases faster than surface area

Answer 32

TRUUUUUUE

Question 33

Are we going to ace this test?

Answer 33

YES BAE