Unit 4 Review

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What is diffusion?

Diffusion requires no energy expenditure in order to occur.

True

False

Diffusion always occurs at the same rate.

True

False

How are we able to affect the rate that diffusion occurs?

Why is diffusion important to the functioning of our cells?

Move the items into the correct category based on the effect they have on diffusion.

Low concentration
Increased temperature
Increased pressure
Decreased temperature
High concentration

Diffusion occurs faster
Diffusion occurs slower

Which term describes the movement of water across a semipermeable membrane?

active transport

osmosis

diffusion

endocytosis

Which type of solution has a higher solute concentration than the cell?

hypertonic

hypotonic

isotonic

extracellular

During osmosis, water moves from an area of __ concentration to an area of _ concentration.

high, low

different, equal

low, high

equal, high

What is osmosis?

Osmosis is the movement of water molecules from an area of low concentration to high concentration.

True

False

Osmosis is a type of passive transport that occurs without the need for energy.

True

False

Active transport does not require energy.

True

False

Where does the energy for active transport most often come from?

Explain why active transport is important.

__________ moves large particles into a cell. 

__________ moves large particles out of the cell. 

In active transport, molecules move from an area of _ concentration to __ concentration.

High, low

Equal, low

Low, high

Low, equal

Which transport mechanism uses carrier proteins to move molecules?

Active transport

Endocytosis

Simple diffusion

Exocytosis

Diffusion requires no energy expenditure in order to occur. 

True

False

Diffusion always occurs at the same rate. 

True

False

Move the items into the correct category based on the effect they have on diffusion. 

Low concentration

Increased temperature

Increased pressure

Decreased temperature 

High concentration 

Diffusion occurs faster

Diffusion occurs slower

Which term describes the movement of water across a semipermeable membrane?

active transport

osmosis

diffusion

endocytosis

Which type of solution has a higher solute concentration than the cell?

hypertonic

hypotonic

isotonic

extracellular

During osmosis, water moves from an area of ________ concentration to an area of _______ concentration. 

high, low

different, equal

low, high

equal, high

Osmosis is the movement of water molecules from an area of low concentration to high concentration.

True

False

Osmosis is a type of passive transport that occurs without the need for energy.

True

False

Active transport does not require energy. 

True

False

In active transport, molecules move from an area of ___ concentration to ____ concentration. 

High, low

Equal, low

Low, high

Low, equal

Which transport mechanism uses carrier proteins to move molecules?

Active transport

Endocytosis

Simple diffusion

Exocytosis