Plasma Membrane Transport

The function of the plasma membrane is to

• regulate what enters and leaves the cell

• fight bacteria and viruses that enter the cell

• make sure each cell reproduces

• store DNA within the cell

Tags

NGSS.MS-LS1-2

The cell membrane is selectively permeable, which means

• Everything can enter and nothing can leave

• Certain things can enter while others cannot

• Nothing can enter the cell at all

• Only glucose can enter

Tags

NGSS.MS-LS1-2

Which type of cellular transport does not require energy?

• Passive

• Active

• Endocytosis

• Exocytosis

What is osmosis?

• equal concentration

• diffusion of water through a selectively permeable membrane

• movement of sugar through a selectively permeable membrane

• non-polar tails

What type of transport requires energy to move substances across the plasma membrane?

• Passive transport

• Active transport

• Facilitated diffusion

• Osmosis

Which component of the plasma membrane is primarily responsible for its selective permeability (allowing only certain things in) ?

• Carbohydrates

• Proteins

• Lipids

• Nucleic acids

Locate a Channel protein in the cell membrane.

Which is true about active transport?

• It requires energy

• it does not require energy

• It moves material with the concentration gradient

• it moves material from high to low concentration

If you put a plant in salt water, the cells will

• swell because water diffuses into the cells

• not change in appearance

• shrivel because water diffuses out of the cell

Tags

NGSS.MS-LS1-2

Placing a cell containing 20% salt into a solution containing 7% salt will cause the cell to

• shrink

• swell

• stay the same

Tags

NGSS.MS-LS2-1