Simple Diffusion and Cell Membrane

The job or function of the cell membrane is:

• break down parts of cells

• Stores water

• Supports the cell wall

• Regulates or controls what materials move in and out of the cell

Tags

NGSS.MS-LS1-2

Diffusion in cells is:

• The process by which molecules move from a region of high concentration to a region of low concentration
• The process by which cells divide
• The process by which cells produce energy
• The process by which cells absorb nutrients

Tags

NGSS.MS-LS1-2

The cell part that controls what enters and leaves the cell is the:

• Nucleus
• Mitochondria
• Cell Wall
• Cell Membrane

Tags

NGSS.MS-LS1-2

The cell membrane is mainly made of:

• Proteins
• Carbohydrates
• Lipids
• Nucleic acids

Tags

NGSS.MS-LS1-2

The head of the phospholipid _____________ water.

• attracts
• repels
• destroys
• ignores

During diffusion, if the concentration of molecules on each side of the cell membrane are THE SAME, what do the molecules do?

• leave the cell

• keep moving back and forth

• enter the cell

• stop moving

Select ALL that are PASSIVE TRANSPORT.

• Osmosis

• Diffusion

• Down or with the concentration gradient

• facilitated diffusion

• Channel protein

Select all that are ACTIVE transport.

• Against or up the concentration gradient

• Uses or requires ATP

• Endocytosis, exocytosis

• osmosis

Food coloring that is dropped into still water will _______________ throughout the container. The food coloring moves due to___________________.

• evaporate, heat
• freeze, cold temperature
• diffuse, kinetic energy of the molecules

• explode, pressure

Tags

NGSS.MS-PS1-4

This picture shows an experiment with water (blue small dots) and glucose (large red dots). The glucose (solute) CANNOT move across the membrane (middle dashed black line). Which side is hypertonic for solute?

• The left side (less big dots)

• The right side (more big dots)

Tags

NGSS.MS-PS1-2