Educational biology worksheet on cell membrane transport mechanisms.

Task: Match the terms on the left with the definitions on the right.

#### Definitions:
- A. Makes up the cell membrane, two layers
- B. Moves high to low through a protein
- C. In the cell membrane, large molecules pass through
- D. Moves from high to low and uses NO energy
- E. Moves from low to high and uses energy
- F. Regulates what enters and leaves the cell
- G. Moves high to low through the cell membrane
- H. Water moving from high to low
- I. Maintaining an internal balance

#### Terms:
1. Protein
2. Phospholipid
3. Cell membrane
4. Homeostasis
5. Passive Transport
6. Diffusion
7. Facilitated Diffusion
8. Osmosis
9. Active Transport

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Matching Solution:

1. Protein → F. Regulates what enters and leaves the cell
- Proteins in the cell membrane (e.g., channels, pumps, and receptors) regulate the movement of substances into and out of the cell.

2. Phospholipid → A. Makes up the cell membrane, two layers
- Phospholipids form the bilayer structure of the cell membrane, which is composed of two layers.

3. Cell membrane → C. In the cell membrane, large molecules pass through
- The cell membrane controls the passage of substances, including large molecules, into and out of the cell.

4. Homeostasis → I. Maintaining an internal balance
- Homeostasis refers to the maintenance of a stable internal environment within an organism or cell.

5. Passive Transport → D. Moves from high to low and uses NO energy
- Passive transport involves the movement of substances from a region of higher concentration to a region of lower concentration without requiring energy.

6. Diffusion → G. Moves high to low through the cell membrane
- Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration across the cell membrane.

7. Facilitated Diffusion → B. Moves high to low through a protein
- Facilitated diffusion is the movement of substances from high to low concentration, but it requires the assistance of proteins (e.g., carrier proteins or channels).

8. Osmosis → H. Water moving from high to low
- Osmosis is the specific type of diffusion where water moves from an area of high water concentration to an area of low water concentration across a semipermeable membrane.

9. Active Transport → E. Moves from low to high and uses energy
- Active transport involves the movement of substances from a region of lower concentration to a region of higher concentration, requiring energy (usually ATP).

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Labeling the Images:

The images depict different types of transport mechanisms. Let's identify each one:

1. Top Left Image:
- This image shows small molecules moving from a higher concentration to a lower concentration without the involvement of proteins.
- Label: Diffusion

2. Top Right Image:
- This image shows molecules being transported from a lower concentration to a higher concentration using ATP (energy).
- Label: Active Transport

3. Bottom Left Image:
- This image shows molecules moving from a higher concentration to a lower concentration through protein channels.
- Label: Facilitated Diffusion

4. Bottom Right Image:
- This image shows water molecules moving from a higher concentration to a lower concentration across the cell membrane.
- Label: Osmosis

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Final Answer:

#### Matching:
1. Protein → F
2. Phospholipid → A
3. Cell membrane → C
4. Homeostasis → I
5. Passive Transport → D
6. Diffusion → G
7. Facilitated Diffusion → B
8. Osmosis → H
9. Active Transport → E

#### Labeling:
- Top Left: Diffusion
- Top Right: Active Transport
- Bottom Left: Facilitated Diffusion
- Bottom Right: Osmosis

Final Answer:
\boxed{
\begin{array}{ll}
1. \text{Protein} & \text{F} \\
2. \text{Phospholipid} & \text{A} \\
3. \text{Cell membrane} & \text{C} \\
4. \text{Homeostasis} & \text{I} \\
5. \text{Passive Transport} & \text{D} \\
6. \text{Diffusion} & \text{G} \\
7. \text{Facilitated Diffusion} & \text{B} \\
8. \text{Osmosis} & \text{H} \\
9. \text{Active Transport} & \text{E} \\
\end{array}
}