Honors Biology 8.3

Most of the cell membrane is made up of what?

• proteins

• phospholipids

• cholesterol

• surface markers

The head side of the phospholipid is __________

• hydrophilic

• hydrophobic

• isotonic

• hypertonic

The tail side of phospholipids are __________

• isotonic

• hypertonic

• hydrophilic

• hydrophobic

Transport proteins have what function?

• identify each type of cell

• bind to substances

• help with chemical reactions

• move substances in and out of the cell

This is the difference in concentration of a substance between two areas.

• concentration gradient

• fluid mosaic

• solutions

• transport

Diffusion is the movement of a substance

• in liquids

• from low concentration to higher concentration

• from higher concentration to lower concentration

• only through a cell membrane

These proteins are like tunnels or roads for substances to pass through the cell membrane.

• receptor proteins

• enzymes

• carrier proteins

• channel proteins

After diffusion occurs between solutions the concentration of the solutions will

• be greater in one solution

• become equal in both solutions

• be less in one solution

• be imbalanced in both solutions

The parts of the phospholipid bilayer that help to move materials from one side to the other side are made of what?

• cheese

• proteins

• cholesterol

• lipids

_________is the diffusion of water.

• solution

• solute

• concentration gradient

• osmosis