Transport Review Worksheet PDF - Includes matching exercises and a diagram of cellular transport processes.

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## ✔ PART 1: Change the shape of a cell membrane during endocytosis or exocytosis

➤ Answer: C. vesicles

Explanation:
- During endocytosis, the cell membrane folds inward to form a pocket that pinches off into a vesicle containing material from outside the cell.
- During exocytosis, vesicles inside the cell fuse with the plasma membrane and release their contents outside — again involving vesicles changing the shape of the membrane.
- Vesicles are small membrane-bound sacs that help transport materials in/out of the cell and cause temporary changes in membrane shape.

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## ✔ PART 2: Match the term with its correct description

Here’s the matching based on standard biology definitions:

| Term | Description |
|------|-------------|
| A. osmosis | 6. Passive movement of water through a semipermeable membrane |
| B. ionophores | 4. Molecules that create pores (holes) in membranes *(Note: Ionophores facilitate ion transport across membranes by forming channels or acting as carriers)* |
| C. active transport | 3. Movement of molecules from an area of lower concentration to an area of higher concentration using energy (ATP) |
| D. endocytosis | 1. Used when a cell takes in large particles or fluids (e.g., phagocytosis, pinocytosis) |
| E. facilitated diffusion | 5. Passive movement of molecules from high to low concentration using a protein channel or carrier |
| F. passive transport | 2. Movement of molecules from an area of higher concentration to an area of lower concentration without using energy |

> ⚠️ *Note: The worksheet says “Match the term with its correct description” but doesn’t list the terms next to numbers. Based on context and common biology knowledge, we assign them logically.*

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## ✔ PART 3: Label the diagrams of cells using the following terms:
diffusion, active transport, osmosis, potential, equilibrium

We have 4 diagrams. Let’s analyze each one:

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🟢 Diagram 1: CO₂ moving from high to low concentration (no energy shown)

- CO₂ is moving down its concentration gradient → no ATP involved.
- This is passive transport, specifically diffusion.

✔ Label: Diffusion

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🟢 Diagram 2: Glucose moving into cell via protein carrier, from high to low concentration

- Glucose moves down its gradient using a carrier protein → no energy used.
- This is facilitated diffusion, which falls under passive transport.
- But since “facilitated diffusion” isn’t listed, and the options are: *diffusion, active transport, osmosis, potential, equilibrium* — the closest match is diffusion (as it’s still passive and follows gradient).

✔ Label: Diffusion
*(Technically facilitated diffusion, but among given choices, “diffusion” is acceptable as broad category)*

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🟢 Diagram 3: 20 glucose molecules → 2 glucose molecules (with arrow showing movement out)

Wait — actually, looking at the diagram:

It shows glucose moving OUT of the cell, even though there are more glucose molecules INSIDE (20 inside → 2 outside). That means it’s moving against the concentration gradient.

Also, it says “ATP → ADP + Pi” — meaning energy is being used.

✔ This is Active Transport

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🟢 Diagram 4: Water moving into cell (low solute inside → high solute outside)

- Cell has low solute concentration → high water concentration
- Outside has high solute concentration → low water concentration
- Water moves into the cell — from high water concentration to low water concentration → osmosis

✔ Label: Osmosis

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## ✔ Final Answers Summary:

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🔹 Part 1:

C. vesicles

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🔹 Part 2: Matching

| Term | Number |
|------------------|--------|
| A. osmosis | 6 |
| B. ionophores | 4 |
| C. active transport | 3 |
| D. endocytosis | 1 |
| E. facilitated diffusion | 5 |
| F. passive transport | 2 |

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🔹 Part 3: Diagram Labels

1. Diffusion (CO₂ moving down gradient)
2. Diffusion (Glucose via carrier, down gradient — facilitated diffusion)
3. Active Transport (Glucose moving against gradient using ATP)
4. Osmosis (Water moving into cell due to solute difference)

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## 📝 Bonus Notes:

- Equilibrium: Not needed here — none of the diagrams show equal concentrations on both sides.
- Potential: Not applicable in this context — refers to electrochemical potential, not directly shown.

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✔ You’ve now completed the entire worksheet! Let me know if you’d like this turned into a printable answer key or need visuals explained further.