Two

Question 1

Plasma membrane Gate: Gatekeeper

- cells have a plasma membrane

Answer 1

All

Question 2

Separates the cell from its -

Answer 2

Environment

Question 3

Serves as a selectively – barrier between two queous solutions

Answer 3

Permeable

Question 4

Some biological important molecules can be –

across the membrane

Answer 4

Transported

Question 5

Molecules and the membrane
--- bilater of membrane
Barrier to movement --- molecules
Barrier to movement --- molecules
--- molecules pass through the membrane 
Water,oxygen and carbon dioxide

— molecules pass through the membrane
readily mix with hydrophobic core of the phospholipid bilayer

Answer 5

Phospholipid
Large
Charged 
Small
Hydrophobic

Question 6

Plasma membrane Gate: Gatekeeper

— cells have a plasma membrane

Separates the cells from its –

Serves as a selectively— barrier between two aqueous solution

Some biological important molecules can be – across the memebrabe

Answer 6

All
Environment
Permeable
Transported

Question 7

Passive and Active Transport

– transport is when substances are moving with the force of diffusion into or out of the cell.

Happens automatically, requiring no extra energy. Movement from – concentration to —

– transport is when substances are moving against the force of diffusion into or out of a cell.
— added energy
Movement from– concentration to —
— a concentration gradient.

Answer 7

Passive transport
Hight to  Low
Active transport
Requires
Low  to High
Produces

Question 8

Passive Transport

— molecules and – molecules diffuse through membranes

The plasma membrane is — permeable to these molecules

Larger molecules and ions charges atoms and moleculesenter cell through – carriers because they can not pass through the plasma membrane on their own.

— proteins and passive carriers

Answer 8

Small & hyrophobic
Permeable
Proteins
Channel

Question 9

Moving across the membrane channel proteins
Forms water filled— across the plasma membrane

Passive carrier proteins – to molecules being transported

Answer 9

Tunnels

Specific

Question 10

Active Transport

Active carriers are transport proteins that use — from ATP nucleotide energy carrier

Energy changes the — of the carrier, allowing molecules to pass from one side of the – to the other

Produces or maintains a concentration —

Answer 10

Energy
Shape
Membrane
Gradient

Question 11

Special Types of diffusion

In a liquid solution, the solute will move to – the concentration gradient.

The – will also move to equalize the concentration gradient.

If there is a high concentration of solute, that means that there is a – concentration of solvent. The opposite is alwats true

Answer 11

Equalize
Solvent
Low

Question 12

Selective Permeable

The plasma membrane is selectively permeable, allowing water to pass through, but not ellectrically charged – or large molecules.

In those times, where there are different — concentration on either sideof the plasma membrane, the – will still move to equalize the concentration gradient even if the solute is not able to pass through the membrane.

Answer 12

Ions
Solute
Solvent

Question 13

Osmosis
Osmosis is a specific form of – when the solvent is the molecules which is moving across the membrane

In cells the solvent is always –

The water is moving in oder to – the concentration on both side of the membrabe

Answer 13

Diffusion
Water
Equalize

Question 14

Osmosis

A — solution has a higher concentration of solute.

A – solution has a lower concentration of solute

An – solution has equal concentration of solution.

These categories are only relevant when comparing two different solution.

Answer 14

Hypertonic
Hypotonic
Isotonic