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Questions and Answers
What is the fundamental principle underlying diffusion?
What is the fundamental principle underlying diffusion?
- Maintaining equal particle concentration in all areas.
- Active transport of particles against a concentration gradient.
- Movement of particles from low to high concentration.
- Movement of particles from high to low concentration. (correct)
Diffusion aims to create an uneven distribution of particles within a system.
Diffusion aims to create an uneven distribution of particles within a system.
False (B)
Define 'concentration gradient' in the context of diffusion.
Define 'concentration gradient' in the context of diffusion.
Difference in particle concentration between two areas
A steeper concentration gradient results in a ______ rate of diffusion.
A steeper concentration gradient results in a ______ rate of diffusion.
Match the substance with its movement relative to cells:
Match the substance with its movement relative to cells:
Which of the following does NOT increase the speed of diffusion?
Which of the following does NOT increase the speed of diffusion?
Diffusion is not involved to transport substances in or out of cells.
Diffusion is not involved to transport substances in or out of cells.
How does temperature affect the rate of diffusion?
How does temperature affect the rate of diffusion?
For diffusion to occur more rapidly, the distance particles travel should be ______.
For diffusion to occur more rapidly, the distance particles travel should be ______.
A red blood cell needs to efficiently absorb oxygen to deliver to cells throughout the body. According to the principles of diffusion, what cellular modifications would best improve oxygen absorption?
A red blood cell needs to efficiently absorb oxygen to deliver to cells throughout the body. According to the principles of diffusion, what cellular modifications would best improve oxygen absorption?
Larger surface area slows down the diffusion process.
Larger surface area slows down the diffusion process.
Explain the role of diffusion in cellular transport.
Explain the role of diffusion in cellular transport.
Diffusion helps to ______ particles evenly throughout a space or solution.
Diffusion helps to ______ particles evenly throughout a space or solution.
A scientist is studying diffusion rates of a dye in different temperature conditions. Which setup is expected to show the fastest diffusion?
A scientist is studying diffusion rates of a dye in different temperature conditions. Which setup is expected to show the fastest diffusion?
The smaller the difference in concentration between two areas, the faster the rate of diffusion.
The smaller the difference in concentration between two areas, the faster the rate of diffusion.
Name two factors that increase diffusion speed.
Name two factors that increase diffusion speed.
Diffusion is a fundamental process in ______.
Diffusion is a fundamental process in ______.
Based on the principles of diffusion, in which scenario would oxygen diffuse most rapidly into a cell?
Based on the principles of diffusion, in which scenario would oxygen diffuse most rapidly into a cell?
Diffusion requires energy input from the cell.
Diffusion requires energy input from the cell.
How can the rate of diffusion be increased in biological systems?
How can the rate of diffusion be increased in biological systems?
Flashcards
What is Diffusion?
What is Diffusion?
The movement of particles from an area of high concentration to an area of lower concentration.
Why does diffusion occur?
Why does diffusion occur?
To spread out evenly.
Concentration gradient
Concentration gradient
The difference in particle concentration between two areas; A steeper gradient results in faster diffusion.
Diffusion in the body
Diffusion in the body
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Examples of Diffusion in cells
Examples of Diffusion in cells
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Concentration gradient and diffusion speed
Concentration gradient and diffusion speed
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Temperature and Diffusion Speed
Temperature and Diffusion Speed
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Distance and Diffusion Speed
Distance and Diffusion Speed
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Surface area and diffusion speed
Surface area and diffusion speed
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Study Notes
Diffusion
- Diffusion is a fundamental process of biology.
- It involves the movement of particles from an area of high concentration to an area of lower concentration.
- It causes movement of particles from high to low concentration
- Occurs to spread things out evenly
Key Terms
- Concentration gradient is the difference in particle concentration between two areas.
- A steeper gradient results in faster diffusion
Diffusion in the Body
- Cellular transport is how diffusion assists in moving substances in and out of cells.
Examples of Diffusion
- Oxygen and glucose enter cells via diffusion
- Carbon dioxide and urea exit cells via diffusion
Factors Affecting Diffusion Speed
- Concentration gradient: A larger difference leads to faster diffusion.
- Temperature: Higher temperature results in faster diffusion.
- Distance: Shorter distance results in faster diffusion.
- Surface area: Larger surface area results in faster diffusion.
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