Cell Organelles, Membrane and Transport

Front

Something is ___________ ____________ when some molecules can cross the membrane while others cannot.

Back

Selectively (or Semi) Permeable.

Front

The cytoskeleton is made of __________.

Back

Proteins.

Front

In which direction will molecules diffuse in a concentration gradient?

Back

From left to right.

Front

What type of solution is a cell in if it has a lower concentration of solutes compared to the outside?

Back

Hypotonic.

Front

What is embedded in the phospholipid bilayer of a cell membrane?

Back

Proteins.

Front

What is the primary function of the cell membrane?

Back

To regulate what enters and exits the cell.

Front

Define osmosis.

Back

The movement of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is the role of ribosomes in a cell?

Back

To synthesize proteins.

Front

What are the two main types of transport across cell membranes?

Back

Passive transport and active transport.

Front

What is the difference between isotonic, hypertonic, and hypotonic solutions?

Back

Isotonic: equal solute concentration; Hypertonic: higher solute concentration outside the cell; Hypotonic: lower solute concentration outside the cell.