Molecules, Membranes, & Movement

Front

What are the monomers of a lipid polymer?

Back

Fatty Acids & Glycerol

Front

What is the main building block of a membrane?

Back

Phospholipids

Front

What is a membrane protein that moves molecules across the membrane using energy?

Back

Protein pump

Front

Why does eating salty potato chips make you thirsty?

Back

Because the salt on the chips dissolves into your spit, which then sucks water out of your tongue cells.

Front

What is the function of phospholipids in a cell membrane?

Back

They form a bilayer that acts as a barrier to protect the cell and regulate what enters and exits.

Front

Define diffusion.

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What role do transport proteins play in a cell membrane?

Back

They help move substances across the membrane that cannot pass through the lipid bilayer.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport requires energy to move substances against their concentration gradient.

Front

What is a channel protein?

Back

A type of membrane protein that allows specific molecules to pass through the membrane without using energy.