Diffusion and Osmosis

In diffusion, molecules are trying to reach...

• a cool party

• the mitochondria

• an equilibrium

• the membrane

What is passive transport?

• transportation of RNA to ribosomes in the ER

• type of membrane transport that does not require energy to move substances across cell membranes

• type of transport across the membrane of the mitochondria

• type of membrane transport that requires energy to move substances across cell membranes

What is NOT a type of passive transport?

• active transport

• simple diffusion

• osmosis

• facilitated diffusion

What is osmosis?

• The movement of solutes from an area of high concentration to an area of low concentration

• The movement of water across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration

• The active transport of ions across a membrane

• The process by which plants absorb sunlight

Tags

NGSS.MS-LS1-2

What role do protein channels play in cell membranes?

• They synthesize new proteins for the cell

• They provide structural support to the membrane

• They create RNA which is used later in the process of protein synthesis

• They allow specific molecules to pass through the membrane

Tags

NGSS.HS-LS2-3

Which of the following best describes facilitated diffusion?

• Movement of molecules across cell membranes through protein channels without energy

• Transport of molecules against their concentration gradient with energy

• Diffusion of water molecules through a semi-permeable membrane

• Active transport of ions through voltage-gated channels

Which process does NOT require energy from the cell?

• Active transport

• Facilitated diffusion

• Endocytosis

• Exocytosis

What is active transport?

• Movement of molecules within a cell from one organelle to another, not requiring energy.
• Movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, not requiring energy.
• Movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.
• Movement of molecules across a cell membrane from a region of higher concentration to a region of lower concentration, not requiring energy.

Which of the following is a characteristic of active transport?

• It moves substances from a low to a high concentration without energy.

• It does not involve the movement of substances.

• It requires ATP to move substances against their concentration gradient.

• It is the main method for large molecules to exit the cell.

What is the main difference between osmosis and diffusion?

• Osmosis involves energy, and diffusion does not.

• Osmosis is the movement of water, whereas diffusion involves any type of molecule.

• Diffusion can only occur in liquid environments, while osmosis can occur in gaseous environments as well.

• Diffusion requires ATP, and osmosis does not.

Tags

NGSS.MS-LS1-1