Cell Transport

In which solution will water move out of the cell resulting in the cell shriveling up?

• Hypertonic
• Isotonic
• Hypotonic

A molecule that diffuses down a concentration gradient goes from an area of ______ concentration into an area of ______ concentration.

• high, low
• low, high
• passive, active
• active, passive

Passive transport requires no

• concentration gradients
• osmosis
• motion
• energy

What is the term for the diffusion of water across a semipermeable membrane?

• osmosis
• concentration gradient
• isotonic
• facilitated diffusion

The movement of molecules down a concentration gradient through transport proteins in the cell membraneis a type of

• selective transport
• osmosis
• endocytosis
• facilitated diffusion

This is the simplest form of passive transport:

• osmosis
• diffusion
• facilitated diffusion
• endocytosis

Controlling what goes into or out of the cell with the help of energy is called

• active transport
• endocytosis
• passive transport
• exocytosis

This releases substances outside a cell

• endocytosis
• exocytosis
• both

Water moves into a cell when the solution surrounding the cell is

• Hypertonic

• Isotonic

• Hypotonic

Even at _______________ molecules continue to move across the membrane in both directions.

• diffusion

• osmosis

• equilibrium

• passive transport