Podcast
Questions and Answers
Which of the following characteristics distinguishes active transport from passive transport?
Which of the following characteristics distinguishes active transport from passive transport?
- The type of molecules transported across the membrane.
- The presence of a cell membrane.
- The direction of movement relative to the concentration gradient. (correct)
- The requirement for transport proteins.
The uptake of ions by root hairs is an example of what type of cellular transport?
The uptake of ions by root hairs is an example of what type of cellular transport?
- Facilitated Diffusion
- Osmosis
- Passive Transport
- Active Transport (correct)
What is the primary driving force behind the movement of molecules in passive transport?
What is the primary driving force behind the movement of molecules in passive transport?
- The concentration gradient. (correct)
- The electrical charge of the molecule.
- The presence of transport proteins.
- The hydrolysis of ATP.
Which of the following transport mechanisms specifically involves the movement of water molecules across a membrane?
Which of the following transport mechanisms specifically involves the movement of water molecules across a membrane?
In osmosis, water moves from an area of _______ to an area of _______.
In osmosis, water moves from an area of _______ to an area of _______.
Facilitated diffusion requires which of the following to transport molecules across the cell membrane?
Facilitated diffusion requires which of the following to transport molecules across the cell membrane?
What is the role of carrier proteins in passive transport?
What is the role of carrier proteins in passive transport?
How do channel proteins facilitate the transport of ions across the cell membrane?
How do channel proteins facilitate the transport of ions across the cell membrane?
Which process describes the movement of glucose across a cell membrane, facilitated by a carrier protein that changes shape upon binding to glucose?
Which process describes the movement of glucose across a cell membrane, facilitated by a carrier protein that changes shape upon binding to glucose?
How does a high concentration of solute affect the water potential of a solution?
How does a high concentration of solute affect the water potential of a solution?
Flashcards
Active transport
Active transport
Movement of particles through a cell membrane from low to high concentration gradient.
Ion uptake by root hairs
Ion uptake by root hairs
An example of Active transport is the ion uptake by root hairs.
Passive transport
Passive transport
Movement of particles through a cell membrane from high to low concentration gradient.
Diffusion through cell membrane
Diffusion through cell membrane
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Facilitated diffusion
Facilitated diffusion
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Osmosis
Osmosis
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Channel proteins
Channel proteins
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Carrier Protein
Carrier Protein
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Low concentration of solute
Low concentration of solute
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Study Notes
Active Transport
- Movement of particles through a cell membrane occurs from low to high concentration.
- This movement is against the concentration gradient.
- Energy is used from respiration.
- Ion uptake by root hairs is an example.
Passive Transport
- Movement of particles through a cell membrane occurs from high to low concentration.
- Movement occurs down the concentration gradient.
- No energy is used.
Types of Passive Transport
- Diffusion occurs through the cell membrane without needing transport proteins : High to Low concentration.
- Facilitated diffusion involves the movement of particles through transport proteins.
- Osmosis refers to the passage of water molecules through channel proteins from high to low water potential.
- Carrier proteins have two shapes and carry molecules from one side to the other (e.g., glucose).
- Channel proteins: Specific shape to transport ions.
- Low concentration moves to high concentration of solute.
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Description
Explore the differences between active and passive transport in cells. Active transport moves particles against the concentration gradient, requiring energy. Passive transport moves particles down the concentration gradient and doesn't require energy.
