Cells In Their Enviornment Section 4

Question 0

What is diffusion?

Answer 0

Diffusion is the process in which molecules move from an area of high concentration too low concentration. The main method in which small molecules move across the cell membrane

Question 1

What does selectively permeable mean?

Answer 1

Some substances can pass through the membrane while others can’t.

Question 2

What is osmosis?

Answer 2

Osmosis is the diffusion of molecules throughout the membrane.

Question 3

What is passive transport?

Answer 3

Passive transport is the movement of dissolved materials through a cell membrane without using cellular energy.

Question 4

What is active transports?

Answer 4

Active transport is the movement of materials through a cell membrane using cellular energy

Question 5

How do most small molecules cross the membrane?

Answer 5

Most small molecules enter the membrane through passive transport, or osmosis.

Question 6

Why is osmosis important to cells?

Answer 6

Because most cells can’t function properly without adequate water, many cellular processes depend on osmosis.

Question 7

What’s the difference between passive transport and active transport?

Answer 7

Active transport: when a cell uses energy to bring in molecules through transport proteins or engulfing.

Passive transport: when molecules go through the membrane using osmosis, without using up proteins.