Anatomy and Physiology: Cell Transport Quiz

What is the primary characteristic of a selectively permeable membrane?

• It allows only certain molecules to pass through.

• It allows all molecules to pass through.

• It allows molecules to pass through only at high temperatures.

• It blocks all molecules from passing through.

In diffusion, solute particles move from an area of ______ concentration to an area of ______ concentration.

• neutral; high

• high; low

• low; neutral

• low; high

Which of the following is true about passive processes like diffusion?

• They require energy input.

• They occur spontaneously without energy.

• They move particles against the concentration gradient.

• They only occur in non-living systems.

Facilitated diffusion requires the presence of what to occur?

• A lipid bilayer

• A protein

• Energy in the form of ATP

• A concentration gradient

In osmosis, water moves towards the side of the membrane with:

• No solute concentration

• Equal solute concentration

• Higher solute concentration

• Lower solute concentration

What happens to a cell in a hypertonic solution?

• It doubles in size

• It remains the same

• It bursts

• It shrivels

Which type of solution has the same solute concentration inside and outside the cell?

• Isotonic

• Supersonic

• Hypotonic

• Hypertonic

How does molecular weight affect diffusion rate?

• Higher molecular weight decreases diffusion rate.

• Lower molecular weight decreases diffusion rate.

• Higher molecular weight increases diffusion rate.

• Molecular weight has no effect on diffusion rate.

What effect does increasing temperature have on diffusion rate?

• It decreases the diffusion rate.

• It reverses the direction of diffusion.

• It increases the diffusion rate.

• It has no effect on diffusion rate.

A higher concentration gradient results in:

• A slower diffusion rate

• No change in diffusion rate

• A faster diffusion rate

• Reversal of diffusion direction