The image illustrates the concepts of
active transport and
passive transport, along with their subcategories. Let's break down the problem and explain the solution step by step.
Key Concepts in the Image:
1.
Active Transport (1):
- Requires energy (ATP) to move molecules against their concentration gradient.
- Molecules move from a lower concentration to a higher concentration.
- Example: Sodium-potassium pump.
2.
Passive Transport (2):
- Does not require energy.
- Molecules move down their concentration gradient, from high to low concentration.
- Includes diffusion and facilitated diffusion.
3.
Diffusion (3):
- A type of passive transport where molecules move freely through the membrane without any assistance.
- No carrier proteins are involved.
- Example: Oxygen or carbon dioxide moving across the cell membrane.
4.
Facilitated Diffusion (4):
- A type of passive transport where molecules move down their concentration gradient but require the help of carrier proteins or channels.
- No energy is required.
- Example: Glucose entering a cell via glucose transporter proteins.
Explanation of the Image:
-
Left Side (Active Transport):
- The process involves ATP (adenosine triphosphate), indicating that energy is being used.
- Molecules are moving from a lower concentration on one side of the membrane to a higher concentration on the other side.
- This is characteristic of active transport.
-
Right Side (Passive Transport):
- There is no mention of ATP, indicating that no energy is required.
- Molecules are moving down their concentration gradient.
- Two processes are shown:
-
Diffusion (3): Molecules moving freely without any assistance.
-
Facilitated Diffusion (4): Molecules moving with the help of carrier proteins or channels.
Solution:
Based on the labels and the processes depicted:
1.
Active Transport (1): The process on the left side, which uses ATP to move molecules against their concentration gradient.
2.
Passive Transport (2): The overall category for the processes on the right side, which do not require energy.
3.
Diffusion (3): The process where molecules move freely through the membrane without assistance.
4.
Facilitated Diffusion (4): The process where molecules move down their concentration gradient with the help of carrier proteins or channels.
Final Answer:
\[
\boxed{
\begin{aligned}
1. & \text{ Active transport} \\
2. & \text{ Passive transport} \\
3. & \text{ Diffusion} \\
4. & \text{ Facilitated diffusion}
\end{aligned}
}
\]
Parent Tip: Review the logic above to help your child master the concept of passive transport worksheets.
