Biology Active and Passive Transport Quiz

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Questions and Answers

What is the primary function of the cell membrane?

To separate the cell's interior from the external environment (correct)

To produce proteins for the cell

To provide energy for active transport

To store genetic information

How does osmosis differ from active transport?

Active transport is quicker than osmosis

Osmosis involves the movement of water, whereas active transport moves ions (correct)

Osmosis requires energy, while active transport does not

Both processes occur only in plant cells

What happens to a red blood cell in a hypotonic solution?

It remains unchanged in shape

It swells and undergoes lysis (correct)

It shrinks and becomes crenated

It becomes rigid and expands

Which statement correctly describes isotonic solutions?

They maintain cell size by having equal solute concentration inside and out Signup and view all the answers

What is facilitated diffusion?

The passive transport of substances via protein channels Signup and view all the answers

Which of the following statements is true about hypertonic solutions?

They can lead to cell shrinkage due to water loss Signup and view all the answers

What is the movement of water through a semi-permeable membrane called?

Osmosis Signup and view all the answers

Which equipment would be most appropriate to use for measuring liquid volumes accurately in this experiment?

Pipetman Signup and view all the answers

What is the primary reason for avoiding air bubbles when covering the slide with a coverslip?

Air bubbles can block the view of the specimen Signup and view all the answers

Which solution is most likely to cause cells to swell when added to a slide?

Hypotonic solution Signup and view all the answers

During the observation, what parts of the cell must be labeled?

Cytoplasm and membrane Signup and view all the answers

What should be done after comparing the three slides?

Determine which slide contains the isotonic solution Signup and view all the answers

How many slides must be prepared for the observation?

Three slides Signup and view all the answers

What is osmosis?

Movement of water across a semipermeable membrane Signup and view all the answers

What distinguishes facilitated diffusion from active transport?

Facilitated diffusion is a passive process, while active transport requires energy Signup and view all the answers

What effect does a hypertonic solution have on cells?

Cells lose water and may shrivel Signup and view all the answers

What is the purpose of labeling the microscope slide with the group and solution?

To track which solution was used on each slide Signup and view all the answers

What should be minimized when placing the coverslip on the microscope slide?

Air bubbles underneath the coverslip Signup and view all the answers

Which solution would likely cause cells to swell when placed in an onion cell slide?

Distilled Water Signup and view all the answers

What must be done to prepare the onion tissue for microscopy?

Peel and place the shiny side up on the slide Signup and view all the answers

When preparing human red blood cells for observation, what is the first step?

Label the slide with group and solution Signup and view all the answers

In the experiment with onion cells, what is the main reason for using three different solutions?

To compare the effects of hypertonic, hypotonic, and isotonic conditions Signup and view all the answers

Why is it important to take pictures of the prepared slides?

To review the results with the group later Signup and view all the answers

What is the likely effect of placing human red blood cells in a hypertonic solution?

Cells will shrink as water exits the cells Signup and view all the answers

Study Notes

Active and Passive Transport

Passive transport moves ions and molecules across membranes without energy.
All living organisms have a basic functional unit called a cell.
Inside the cell are cell organelles and a nucleus, both are surrounded by membranes.
The cell membrane separates the cell's interior from the external environment.
The membrane is selectively permeable, controlling what enters and leaves.
Transport occurs to balance concentrations inside and outside of the cell.
Types of passive transport:
- Diffusion
- Facilitated diffusion
- Osmosis

Osmosis

Osmosis is the movement of water molecules across a semi-permeable membrane from a higher water concentration to a lower water concentration.
This can be observed in living cells.
In comparing solutions:
- A hypertonic solution has a higher solute concentration.
- A hypotonic solution has a lower solute concentration
- An isotonic solution has equal solute concentrations.

Cell Types

The lab exercise involves observing different cell types under low and high magnification of a microscope.
Cell observations should describe any differences between observed cell types.

Lab Procedure

The lab has a procedure for examining onion plant cells:
- Peel an onion, and place the tissue on a slide.
- Add a drop of solution A to the tissue.
- Cover with a coverslip.
- Repeat for solutions B & C.
- Observe each solution under the microscope at low and high magnification.
- Label and image the cells.
- Compare the solutions.
The lab also includes a procedure for examining human red blood cells
- Place a drop of blood on a slide.
- Add drops of solutions A, B & C.
- Cover with a coverslip.
- Observe each drop under a microscope at low and high magnification.
- Label and image the red blood cells.
- Compare the solutions.

Additional Questions

Differences between human and plant cells should be compared and noted
Definitions of osmosis and facilitated diffusion, including explanations of the difference between these and active transport.

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Description

Test your understanding of active and passive transport mechanisms in cells. This quiz covers concepts related to cell membranes, osmosis, and the different types of transport. Gain a deeper insight into how substances move across cellular boundaries.