Cell Transport

This picture is a representation of what type of transport?

• Osmosis because it is diffusing through a protein from an area of high concentration to low concentration.

• Facilitated diffusion because it is diffusing through a protein from an area of high concentration to low concentration.

• Facilitated diffusion because it is diffusing through a protein from an area of low concentration to high concentration.

• Simple diffusion because it is diffusing through a protein from an area of high concentration to low concentration.

Active transport ​ (a)   require energy because it moves ​ (b)   the concentration gradient, from ​ (c)   .

• does NOT
• does
• with
• against
• high to low
• low to high

Which statement is correct? (choose 2)

• In passive transport; particles move against the concentration gradient

• In passive transport; particles move up the concentration gradient

• In passive transport; particles move with the concentration gradient

• In passive transport; particles move down the concentration gradient

What is the definition of Selective Permeability?

• The movement of materials across the cell membrane that requires NO ENERGY from the cell.

• The movement of materials through (or across) the cell membrane

• The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.

Tags

NGSS.MS-LS1-2

If you looked at red blood cells under a microscope and saw the blood cells exploded, what would you say happened?

• The cells were placed in a hypotonic solution.

• the solution was isotonic.

• The solution was hypertonic.

Organize these options into the right type of transport:

Groups:

(a) Passive Transport

,

(b) Active Transport

• molecules move AGAINST the gradient

• molecules move from high concentration to low

• does NOT require energy

• molecules move from low concentration to high

• requires energy

• molecules move WITH the gradient

What is the difference between active and passive transport?

• Active does not need energy and passive uses ATP (energy)

• Active uses ATP (energy) and passive does not need energy

• Active stores transport proteins and passive releases 

• Active uses hormones and passive does not 

Answer explanation

The question asks about the difference between active and passive transport. The correct answer is that active transport requires ATP (energy), while passive transport does not. This is because active transport moves substances against their concentration gradient, which requires energy. On the other hand, passive transport moves substances along their concentration gradient, thus no energy is required.

The diagram shows two chambers with different concentration of molecules separated by a selectively permeable membrane. Predict what will happen to the WATER molecules ?

• move from B to A due to diffusion

• move from B to A due to osmosis

• move from B to A due to active transport

• move from A to B due to osmosis

Answer explanation

The question asks about the movement of water molecules between two chambers with different concentrations, separated by a selectively permeable membrane. The correct answer is that water will move from chamber B to A due to osmosis. Osmosis is the process where water molecules move from an area of lower concentration to an area of higher concentration through a selectively permeable membrane.

Organisms in the freshwater ecosystem are negatively impacted by saltwater because it placed them into a –

• hypertonic solution and too much water was being brought into their cells

• hypertonic solution and too much water was leaving their cells

• hypotonic solution and too much water was being brought into their cells

• hypotonic solution and too much water was leaving their cells

Answer explanation

The correct answer is 'hypertonic solution and too much water was leaving their cells'. In a hypertonic solution, the concentration of solutes is higher outside the cell than inside. This causes water to move out of the cell to balance the concentration, which can lead to cell dehydration and negatively impact organisms in a freshwater ecosystem when exposed to saltwater.

Tags

4B

What type of transport is shown in the diagram?

• Ion pump

• Facilitated diffusion

• Endocytosis

• Exocytosis