Membranes and Molecular Movement

Passive transport is called "passive" because it occurs WITHOUT

• cause.

• using energy.

• a concentration gradient.

• a cell wall.

If you were looking for transport proteins, where would you find them?

• in a cell's nucleus

• in a cell's membrane

• in a cell's cell wall

• in a cell's lysosome

Which is true about active transport?

• It requires energy

• it is a type of diffusion

• It moves substances down the concentration gradient

• it moves material from high to low concentration

Which of the following substances passes through the plasma membrane through osmosis?

• glucose

• water

• oxygen

• ions

The picture is an example of...

• active tranport
• passive transport
• diffusion
• osmosis

When the concentration of solutes inside and outside of the cell is equal, the solution is _________ compared to the cell.

• Isotonic

• Hypertonic

• Hypotonic

• Concentration

When animal cells are placed in a __________ solution they begin to swell.

• Hypertonic

• Isotonic

• Hypotonic

• Concentrated

Tags

NGSS.HS-LS1-3

In what direction do particles naturally diffuse?

• Up the concentration gradient

• Down the concentration gradient

• Across the concentration gradient

Most of the cell membrane is made of...

• Phospholipids

• Cholesterol

• Proteins

• DNA

What forms the channels and pumps in the membrane?

• carbohydrates

• proteins

• hydrophilic heads

• lipids