Comprehensive concept map illustrating the mechanisms of cell transport, distinguishing between active and passive processes.

You're looking at a concept map about Cell Transport, which organizes the key ideas and relationships between different types of transport across the cell membrane.

Let’s fill in the blanks logically, based on biology principles:

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🔲 Top Level:

> Cell Transport → regulated by → Cell Membrane

✔ The cell membrane (also called plasma membrane) regulates what enters and exits the cell.

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➡️ Cell Membrane is made of:

> Phospholipid Bilayer + Proteins

✔ The diagram shows the bilayer structure with embedded proteins — this is the fluid mosaic model.

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📌 Cell Transport includes two main categories:

> Active and Passive

✔ These are the two broad classifications of transport mechanisms.

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## ⚡ ACTIVE TRANSPORT

> Requires → Energy (ATP)
> Includes → Endocytosis and Exocytosis

✔ Active transport moves substances against their concentration gradient and requires energy (ATP).

- The left image (with vesicles engulfing material) = Endocytosis
- The right image (vesicles releasing material outside) = Exocytosis

So:
- “requires” → Energy (or ATP)
- “includes” → Endocytosis and Exocytosis

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## 🌊 PASSIVE TRANSPORT

> Includes → Osmosis and Diffusion

✔ Passive transport does NOT require energy; it moves substances down their concentration gradient.

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➤ OSMOSIS:

> Involves → Water

✔ Osmosis is the diffusion of water across a selectively permeable membrane.

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➤ DIFFUSION:

> Where molecules move from → High concentration to → Low concentration

✔ This is the definition of simple diffusion.

> Until → Equilibrium is reached

✔ Diffusion continues until concentrations are equal on both sides (equilibrium).

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## ✔ Final Filled Concept Map:

```
Cell Transport
│
└── regulated by → [Cell Membrane]
│
├── made of → [Phospholipid Bilayer] ←→ [Proteins]
│
└── which includes → [Active] and [Passive]

[Active]
│
├── requires → [Energy (ATP)]
│
└── includes → [Endocytosis] and [Exocytosis]

[Passive]
│
├── includes → [Osmosis] and [Diffusion]
│
│ [Osmosis] → involves → [Water]
│
└── [Diffusion] → where molecules move from [High concentration] to [Low concentration]
│
└── until → [Equilibrium]
```

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## 🧠 Summary Explanation:

- Cell membrane controls transport via its structure (phospholipid bilayer + proteins).
- Passive transport (diffusion & osmosis) doesn’t need energy — moves *down* the gradient.
- Active transport (endocytosis, exocytosis) needs energy — moves *against* the gradient or large particles.
- Osmosis = water moving to balance solute concentrations.
- Diffusion = molecules spreading out until evenly distributed (equilibrium).

This concept map helps visualize how cells maintain homeostasis through selective movement of materials.

Let me know if you’d like a labeled diagram version!