Passive & Active Transport

Use the diagram to answer the question. What is happening in the diagram and what is this process called?

• Large particles are entering the cell through exocytosis.

• Large particles are exiting the cell through exocytosis.

• Large particles are entering the cell through endocytosis.

• Large particles are exiting the cell through endocytosis.

Answer explanation

This image shows particles being engulfed and brought IN to the cell. So it is endocytosis!

Use the diagram to answer the following question. What process is occurring and what is missing from this diagram?

• The diagram is showing active transport because the molecules are moving from low concentration to high concentration, but energy should be included in the diagram.

• The diagram is showing passive transport because the molecules are moving from high concentration to low concentration, but energy should be included in the diagram.

• The diagram is showing active transport because the molecules are moving from high concentration to low concentration, but energy should be included in the diagram.

• The diagram is showing passive transport because the molecules are moving from low concentration to high concentration, but energy should be included in the diagram.

Answer explanation

Active transport forces molecules to move from low concentration to high concentration and it requires the use of energy. This is going up or against the concentration gradient!

Use the diagram to answer the question. What process is being shown in the diagram.

• diffusion

• endocytosis

• exocytosis

• osmosis

Answer explanation

This image shows molecules EXiting the cell so it shows exocytosis! This is active transport and requires energy!

When streptococcus pneumoniae are exposed to an antibiotic, the bacteria try to pump the antibiotic out of their cells. Which of the following mechanisms is most likely used by the streptococcus pneumoniae to pump the antibiotic out of their cells?

• osmosis

• facilitated diffusion

• diffusion

• active transport

Answer explanation

Whenever a cell is 'pump'ing a molecule it requires energy and will be active transport!

Which of the following describes active transport correctly?

• Active transport uses ATP energy to move molecules with the concentration gradient (from low to high).

• Active transport uses ATP energy to move molecules against the concentration gradient (from low to high).

• Active transport does not use ATP energy to move molecules with the concentration gradient (from high to low).

• Active transport does not use ATP energy to move molecules against the concentration gradient (from high to low).

Answer explanation

Remember active transport is like going up a slide!

Tags

NGSS.HS-LS2-3

Use the image to answer the question.

D represents a semipermeable membrane. What does that mean.

• Anything can cross the membrane

• Some things can cross the membrane and others cannot

• Nothing can cross the membrane

• Sometimes things can cross the membrane and sometimes nothing can

Use the image to answer the question. Which of the following statements is true? Check all of the correct answers!

• Side F has less water than side A

• The water level of side A will lower

• Side A has less water than side F

• The water level of side F will lower

Answer explanation

Side A has less water because the water levels are the same but side A has more solutes meaning less water. This means water will move from side F to side A.

Describe what would happen to an animal cell surrounded by pure water.

Answer explanation

Pure water would be hypotonic to the cell. So water would rush into the cell causing it to swell and possibly burst.

A patient come to the hospital with water toxicity from drinking too much water. What is happening to the patient's cells and why?

• The water has made the fluids in his body hypotonic so water is entering his cells causing them to swell.

• The water has made the fluids in his body hypertonic so water is entering his cells causing them to swell.

• The water has made the fluids in his body hypotonic so water is entering his cells causing them to shrivel.

• The water has made the fluids in his body hypertonic so water is entering his cells causing them to shrivel.

Tags

NGSS.HS-LS1-3

A patient come to the hospital with water toxicity from drinking too much water. The doctor wants to treat the patient by giving him an IV to change the tonicity of the fluids in his body. What type of IV solution should the doctor give him?

• Isotonic so everything remains the same.

• Hypertonic so water leaves his cells

• Hypotonic so water enters his cells.

• Pure water

Answer explanation

The patient's cells are swollen with water. Adding a hypertonic solution will cause water to leave the cells.

Tags

NGSS.HS-LS1-3