Cell Transport

Proteins built into the cell membrane which assist with the movement of materials are called:

• receptor proteins

• transport proteins

• marker proteins

• channel proteins

Proteins built into the cell membrane which require energy to bind and to allow signal molecules in and out of the cell

• receptor proteins

• transport proteins

• marker proteins

• channel proteins

Diffusion is the movement of a substance

• through a lipid bilayer

• only in water

• from an area of low concentration to an area of high concentration

• from an area of high concentration to an area of low concentration

The diffusion of water through a permeable membrane is called

• facilitated diffusion

• active transport

• osmosis

• endocytosis

Which of the following is NOT characteristic of active transport?

• It moves substances against a concentration gradient

• It requires energy from the cell

• It involves facilitated diffusion

• It relies on carrier proteins that often function as the sodium potassium pump

Which type of membrane protein transmits information into the cell by responding to signal molecules?

• carrier proteins

• transport proteins

• receptor proteins

• marker proteins

Molecules that are too large to be moved through the cell membrane can be transported OUT OF the cell by

• osmosis

• exocytosis

• endocytosis

• diffusion

If the concentration of a sugar solution is lower outside the cell than inside the cell, which of the following will happen by osmosis?

• Sugar will move into the cell

• Water will move into the cell

• Sugar will move out of the cell

• Water will move out of the cell

If a solution has a higher concentration of salt than the cell, forcing water is move out of the cell, then then the solution is a ______________ solution

• hypotonic

• hypertonic

• isotonic

• exotonic

How does oxygen get from the alveoli of our lungs to our blood cells?

• Diffusion

• Exfusion

• Osmosis

• Receptor proteins