Diffusion, Osmosis, Passive Transport, and Active Transport

What is osmosis?

• Osmosis is the movement of nutrients into cells.
• Osmosis is the process of cell division.
• Osmosis is the movement of water across a membrane due to concentration differences.
• Osmosis is the transfer of energy between cells.

What is diffusion?

• Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration.
• Diffusion is the transfer of energy from one particle to another.
• Diffusion refers to the mixing of two substances in equal proportions.
• Diffusion is the process of particles moving randomly without any concentration gradient.

A concentration gradient is

• the process of diffusion in a liquid
• the difference in concentration of a substance across a space.
• the rate at which a substance evaporates
• the amount of substance in a single location

Substances tend to move from areas of______ concentration to areas of ______concentration

• higher; lower
• equal; variable
• lower; higher
• none; some

Where does active and passive transport take place?

• Nucleus
• Cell membranes
• Cytoplasm
• Ribosomes

Why is active and passive transport necessary?

• Active transport is only used in plant cells.
• Passive transport requires energy input from the cell.
• Both types of transport are unnecessary for cell function.
• Active and passive transport are necessary for maintaining cellular homeostasis and facilitating the movement of substances across cell membranes.

Active transport requires __________ and is able to move things __________ the concentration gradient from areas of ________ concentration to areas of __________ concentration.

• energy; against; low; high
• no energy; against; high; low
• energy; with; high; low
• passive transport; with; high; low

Passive transport requires __________ and is able to move things __________ the concentration gradient from areas of ________ concentration to areas of __________ concentration.

• no energy; down; high; low
• no energy; across; equal; unequal
• energy; down; low; high
• no energy; up; low; high

Putting a drop of food coloring in water is an example of

• diffusion
• filtration
• evaporation
• osmosis

The ​ (a)   of water, across a semipermeable​ (b)   is called ​ (c)   . This is how ​ (d)   gets into and out of most cells.

• diffusion

• membrane

• osmosis

• water

Answer explanation

The process of water moving across a semipermeable membrane is called osmosis, which is how water gets into and out of most cells.

Tags

HS-LS1-3