Transport Across the Cell Membrane worksheet - Free Printable
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Step-by-step solution for: Transport Across the Cell Membrane worksheet
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Show Answer Key & Explanations
Step-by-step solution for: Transport Across the Cell Membrane worksheet
The image provided is a flowchart about transport across the cell membrane. The task is to match the terms at the bottom of the chart to their correct spots in the flowchart. Below, I will solve the problem step by step and explain the solution.
---
1. Passive Transport:
- Occurs down the concentration gradient (high → low).
- Does not require energy (ATP).
2. Active Transport:
- Occurs against the concentration gradient (low → high).
- Requires energy (ATP).
3. Types of Transport:
- Simple Diffusion: Movement of molecules from high to low concentration without any assistance.
- Facilitated Diffusion: Movement of molecules from high to low concentration with the help of carrier proteins or channels.
- Osmosis: Special case of diffusion for water molecules across a semipermeable membrane.
- Active Transport: Movement of molecules against the concentration gradient using ATP, often involving pumps like the Na+/K+ pump.
- Endocytosis: Bulk transport into the cell (e.g., phagocytosis, pinocytosis).
- Exocytosis: Bulk transport out of the cell.
---
#### Left Side: Passive Transport
1. Occurs down the concentration gradient (high → low):
- This is passive transport.
2. Requires no energy:
- Since passive transport does not require energy, this spot is labeled as no energy.
3. For the transport of water:
- Water movement across the membrane is called osmosis.
4. For the transport of glucose:
- Glucose moves across the membrane via facilitated diffusion, which requires a protein channel or carrier.
5. For the transport of CO₂ and O₂:
- CO₂ and O₂ move across the membrane via simple diffusion because they do not require a carrier.
6. Water moves until it reaches equilibrium:
- Water continues to move until the concentrations on both sides are equal, reaching equilibrium.
7. Requires help from protein channel:
- Facilitated diffusion requires a protein channel or carrier protein.
---
#### Right Side: Active Transport
1. Occurs against the concentration gradient (low → high):
- This is active transport.
2. Requires ATP energy:
- Active transport requires energy in the form of ATP.
3. For small ions:
- Small ions are transported against the concentration gradient using an Na+/K+ pump, which is a type of active transport.
4. For bulk transport into the cell:
- Bulk transport into the cell is called endocytosis.
5. For bulk transport out of the cell:
- Bulk transport out of the cell is called exocytosis.
6. Example for small ions:
- An example of active transport for small ions is the Na+/K+ pump.
7. Example for bulk transport into the cell:
- An example of endocytosis is phagocytosis (amoeba eating).
8. Example for bulk transport out of the cell:
- An example of exocytosis is the release of hormones or neurotransmitters, such as hormone export.
---
Here is how the terms should be matched:
#### Left Side: Passive Transport
- Top box: Passive transport
- Second box: No energy
- Third box: Osmosis
- Fourth box: Facilitated diffusion
- Fifth box: Simple diffusion
- Sixth box: Equilibrium
- Seventh box: Protein channel
#### Right Side: Active Transport
- Top box: Active transport
- Second box: ATP energy
- Third box: Na+/K+ pump
- Fourth box: Endocytosis
- Fifth box: Exocytosis
- Sixth box: Na+/K+ pump
- Seventh box: Amoeba eating
- Eighth box: Hormone export
---
1. Passive Transport:
- Occurs down the concentration gradient and does not require energy.
- Osmosis is specific to water movement.
- Facilitated diffusion uses protein channels or carriers.
- Simple diffusion is for molecules like CO₂ and O₂.
- Equilibrium is reached when water stops moving.
2. Active Transport:
- Occurs against the concentration gradient and requires ATP.
- The Na+/K+ pump is a classic example of active transport for ions.
- Endocytosis and exocytosis are examples of bulk transport.
- Amoeba eating is a specific type of endocytosis.
- Hormone export is a specific type of exocytosis.
---
The completed flowchart matches the terms as follows:
```
Passive Transport:
- Occurs down the concentration gradient (high → low): Passive transport
- Requires: No energy
- For the transport of water: Osmosis
- For the transport of glucose: Facilitated diffusion
- For the transport of CO₂ and O₂: Simple diffusion
- Water moves until it reaches: Equilibrium
- Requires help from: Protein channel
Active Transport:
- Occurs against the concentration gradient (low → high): Active transport
- Requires: ATP energy
- For small ions: Na+/K+ pump
- For bulk transport into the cell: Endocytosis
- For bulk transport out of the cell: Exocytosis
- Example for small ions: Na+/K+ pump
- Example for bulk transport into the cell: Amoeba eating
- Example for bulk transport out of the cell: Hormone export
```
Final Answer: \boxed{\text{See explanation above}}
---
Key Concepts in Transport Across the Cell Membrane
1. Passive Transport:
- Occurs down the concentration gradient (high → low).
- Does not require energy (ATP).
2. Active Transport:
- Occurs against the concentration gradient (low → high).
- Requires energy (ATP).
3. Types of Transport:
- Simple Diffusion: Movement of molecules from high to low concentration without any assistance.
- Facilitated Diffusion: Movement of molecules from high to low concentration with the help of carrier proteins or channels.
- Osmosis: Special case of diffusion for water molecules across a semipermeable membrane.
- Active Transport: Movement of molecules against the concentration gradient using ATP, often involving pumps like the Na+/K+ pump.
- Endocytosis: Bulk transport into the cell (e.g., phagocytosis, pinocytosis).
- Exocytosis: Bulk transport out of the cell.
---
Matching Terms to the Flowchart
#### Left Side: Passive Transport
1. Occurs down the concentration gradient (high → low):
- This is passive transport.
2. Requires no energy:
- Since passive transport does not require energy, this spot is labeled as no energy.
3. For the transport of water:
- Water movement across the membrane is called osmosis.
4. For the transport of glucose:
- Glucose moves across the membrane via facilitated diffusion, which requires a protein channel or carrier.
5. For the transport of CO₂ and O₂:
- CO₂ and O₂ move across the membrane via simple diffusion because they do not require a carrier.
6. Water moves until it reaches equilibrium:
- Water continues to move until the concentrations on both sides are equal, reaching equilibrium.
7. Requires help from protein channel:
- Facilitated diffusion requires a protein channel or carrier protein.
---
#### Right Side: Active Transport
1. Occurs against the concentration gradient (low → high):
- This is active transport.
2. Requires ATP energy:
- Active transport requires energy in the form of ATP.
3. For small ions:
- Small ions are transported against the concentration gradient using an Na+/K+ pump, which is a type of active transport.
4. For bulk transport into the cell:
- Bulk transport into the cell is called endocytosis.
5. For bulk transport out of the cell:
- Bulk transport out of the cell is called exocytosis.
6. Example for small ions:
- An example of active transport for small ions is the Na+/K+ pump.
7. Example for bulk transport into the cell:
- An example of endocytosis is phagocytosis (amoeba eating).
8. Example for bulk transport out of the cell:
- An example of exocytosis is the release of hormones or neurotransmitters, such as hormone export.
---
Final Filling of the Flowchart
Here is how the terms should be matched:
#### Left Side: Passive Transport
- Top box: Passive transport
- Second box: No energy
- Third box: Osmosis
- Fourth box: Facilitated diffusion
- Fifth box: Simple diffusion
- Sixth box: Equilibrium
- Seventh box: Protein channel
#### Right Side: Active Transport
- Top box: Active transport
- Second box: ATP energy
- Third box: Na+/K+ pump
- Fourth box: Endocytosis
- Fifth box: Exocytosis
- Sixth box: Na+/K+ pump
- Seventh box: Amoeba eating
- Eighth box: Hormone export
---
Explanation of Each Match
1. Passive Transport:
- Occurs down the concentration gradient and does not require energy.
- Osmosis is specific to water movement.
- Facilitated diffusion uses protein channels or carriers.
- Simple diffusion is for molecules like CO₂ and O₂.
- Equilibrium is reached when water stops moving.
2. Active Transport:
- Occurs against the concentration gradient and requires ATP.
- The Na+/K+ pump is a classic example of active transport for ions.
- Endocytosis and exocytosis are examples of bulk transport.
- Amoeba eating is a specific type of endocytosis.
- Hormone export is a specific type of exocytosis.
---
Final Answer
The completed flowchart matches the terms as follows:
```
Passive Transport:
- Occurs down the concentration gradient (high → low): Passive transport
- Requires: No energy
- For the transport of water: Osmosis
- For the transport of glucose: Facilitated diffusion
- For the transport of CO₂ and O₂: Simple diffusion
- Water moves until it reaches: Equilibrium
- Requires help from: Protein channel
Active Transport:
- Occurs against the concentration gradient (low → high): Active transport
- Requires: ATP energy
- For small ions: Na+/K+ pump
- For bulk transport into the cell: Endocytosis
- For bulk transport out of the cell: Exocytosis
- Example for small ions: Na+/K+ pump
- Example for bulk transport into the cell: Amoeba eating
- Example for bulk transport out of the cell: Hormone export
```
Final Answer: \boxed{\text{See explanation above}}
Parent Tip: Review the logic above to help your child master the concept of cell membrane transport worksheet.
