Cell and Cell Transport

What is facilitated diffusion?

• Transport that uses proteins to help move molecules across the membrane. 

• Movements of substances through a membrane. 

• When molecules spread from High to Low concentration on their own. 

• When pressure pushes something through a membrane. 

What macromolecules help to make the cell membrane? 

• Proteins 

• Carbohydrates 

• Phospholipids 

• All of the above 

Tags

NGSS.MS-LS1-2

What is it called when molecules move across the cell membrane from an area of high concentration to an area of low concentration through a carrier protein?

• Diffusion

• Osmosis

• Active Transport

• Facilitated Diffusion

what type of solution causes the blood cells to swell and burst.

• hypotonic solution

• hypertonic solution

• isotonic solution

• active transport

Tags

NGSS.MS-LS1-1

What is the main difference between passive transport and active transport?

• Passive transport moves molecules from a low to high concentration, while active transport moves them from high to low concentration.

• Active transport requires cellular energy, while passive transport does not.

• Passive transport can only move water molecules, while active transport can move any type of molecules.

• Active transport uses vesicles, while passive transport uses the cell membrane.

Match the following

• does not require energy, moves from high to low concentration

• active transport

• requires energy, moves from low to high concentration

• facilitated diffusion

• uses a channel protein to move large molecules across a membrane

• osmosis

• the movement of water across a cell membrane

• Passive transport

Examples of this would be diffusion, (41)​ (a)   (the diffusion of water), and facilitated diffusion. Active transport requires the use of energy because it is the movement of molecules from a (42)​ (b)   to (43)​ (c)   concentration (or (44)​ (d)   the concentration gradient).

• Osmosis

• Active Transport

• endocytosis

• exocytosis

• low

• high

• against

Answer explanation

Osmosis is the correct choice as it refers to the diffusion of water. 'Low' and 'high' are accurate for the blanks 39 and 40 respectively, indicating movement against the concentration gradient.

Examples of this would be diffusion, (41)​ (a)   (the diffusion of water), and facilitated diffusion. Active transport requires the use of energy because it is the movement of molecules from a (42)​ (b)   to (43)​ (c)   concentration (or (44)​ (d)   the concentration gradient).

• Osmosis

• Active Transport

• endocytosis

• exocytosis

• low

• high

• against

Answer explanation

Osmosis is the correct choice as it refers to the diffusion of water. 'Low' and 'high' are accurate for the blanks 39 and 40 respectively, indicating movement against the concentration gradient.

What does the term "concentration gradient" refer to?

• The difference in the concentration of a substance from one location to another.

• The total concentration of all solutes in a solution.

• The movement of water through a semipermeable membrane.

• The energy required for active transport.

What is the function of the cell membrane, in ALL living organisms?

• Provides support and structure in the cell.

• Synthesizes protein for ATP for the cell.

• Storage of raw materials (food) and ATP for the cell. 

• Regulates the transport of materials into and out of the cell. 

Tags

NGSS.MS-LS1-2