Cell Transport Review Worksheet for biology education, featuring questions and labeled diagrams of cell membrane transport mechanisms.

It looks like you've uploaded an image of a worksheet titled "CAB Transport Review Worksheet", which appears to be related to cell biology—specifically, the transport of substances across cell membranes. The worksheet includes multiple-choice questions and diagrams involving diffusion, osmosis, active transport, and facilitated diffusion, with several labeled diagrams showing molecules moving across membranes.

Since I cannot view or analyze images directly, I can’t see the exact content of your image. However, I can help you solve the problems if you describe them or type out the questions and diagrams.

But based on typical content in such worksheets, here’s how we can approach this:

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🔬 Common Topics Covered in "Transport Across Membranes" Workbooks:

1. Passive Transport
- Diffusion (simple & facilitated)
- Osmosis
- No energy required
2. Active Transport
- Requires ATP
- Moves against concentration gradient
- Example: Sodium-Potassium Pump
3. Endocytosis & Exocytosis
- Bulk transport via vesicles

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📝 Typical Questions on Such a Worksheet:

Let me walk through what might be on your worksheet and how to solve it:

#### Example Question 1:
> Which process is shown in Diagram A?
>
> [Diagram shows molecules moving from high to low concentration through a protein channel]

✔ Answer: Facilitated diffusion
🔧 Explanation: Molecules are moving down their concentration gradient using a protein channel, no energy needed → passive transport.

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#### Example Question 2:
> In which diagram is active transport occurring?

✔ Answer: Diagram where molecules move from low to high concentration, and ATP is shown or implied.

🔧 Explanation: Active transport requires energy (ATP) to move substances against their gradient.

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#### Example Question 3:
> What happens to a red blood cell placed in a hypertonic solution?

✔ Answer: It shrinks (crenation)
🔧 Explanation: Water leaves the cell by osmosis because the external solution has higher solute concentration.

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#### Example Question 4:
> Identify the type of transport shown when glucose enters a cell via a carrier protein without energy.

✔ Answer: Facilitated diffusion
🔧 Explanation: Glucose uses a carrier protein but moves down its concentration gradient — no ATP used.

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✔ How to Solve These Problems:

1. Look at direction of movement:
- High → Low = Passive (diffusion/osmosis/facilitated)
- Low → High = Active (requires ATP)

2. Check for proteins or channels:
- Protein = facilitated diffusion or active transport
- No protein = simple diffusion

3. Look for ATP or energy input:
- ATP present = active transport

4. For osmosis: Focus on water movement across a semipermeable membrane.

5. Hypertonic vs Hypotonic vs Isotonic:
- Hypertonic → water out → cell shrinks
- Hypotonic → water in → cell swells
- Isotonic → no net movement

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💡 Tips:

- Label each diagram carefully.
- Use arrows to show direction of movement.
- Remember: “High to low” is passive; “Low to high” is active.

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