The Cell

Cholesterol is important in cell membranes for regulation of fluidity.

• True

• False

The head of a phospholipid molecules is

• a phosphate

• a lipid

• hydrophobic

• hydrophilic

Diffusion of water is known as

• diffusion

• osmosis

• endocytosis

• exocytosis

The cell membrane is also called a

• mosaic

• patchwork quilt

• phospholipid bilayer

• cell shield

A protein embedded in the cell membrane is called a/an

• phospholipid bilayer

• peripheral protein

• integral protein

• cholesterol

The movement of small particles from a region of high concentration to a region of low concentration is known as (a)   .

(a)   describes the movement of a substance across a cell membrane against its concentration gradient. This process requires ATP.

(a)   describes the movement of a substance across a cell membrane with its concentration gradient. This process does not require energy.

The tail of a phospholipid molecule is

• hydrophilic

• hydrophobic

• amphoteric

• amphipathic

A cell is (a)   to its environment if the concentration of the solute in the cell is equal to the concentration of the solute outside the cell.

Tags

NGSS.HS-LS1-3