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Flashcards on Diffusion
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What is diffusion?
The movement of particles from an area of high concentration to an area of low concentration.
What factors affect the rate of diffusion?
Temperature, concentration gradient, and surface area
Give an example of diffusion in daily life.
The smell of perfume spreading in a room
What is facilitated diffusion?
Diffusion of molecules across a cell membrane through specific protein channels
What is osmosis?
The diffusion of water molecules across a selectively permeable membrane
Why does diffusion occur?
To achieve equilibrium and equalize concentrations
What is the role of diffusion in respiration?
Diffusion allows for the exchange of oxygen and carbon dioxide in the lungs
What is the role of diffusion in photosynthesis?
Diffusion allows for the movement of carbon dioxide into plant cells for photosynthesis
What is the net movement of particles in diffusion?
From an area of high concentration to an area of low concentration
What is the difference between diffusion and active transport?
Diffusion is passive and does not require energy, while active transport requires energy
What is the role of diffusion in digestion?
Diffusion allows for the absorption of nutrients from the digestive system into the bloodstream
How does temperature affect the rate of diffusion?
Higher temperatures increase the rate of diffusion as particles have more energy to move
What is the role of diffusion in the exchange of gases in plants?
Diffusion allows for the movement of oxygen and carbon dioxide through the stomata on plant leaves
What is the role of diffusion in the nervous system?
Diffusion allows for the movement of neurotransmitters across synapses for signal transmission
What is the role of diffusion in the excretory system?
Diffusion enables the removal of waste products from the bloodstream into the kidneys for excretion
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Test Your Knowledge
Diffusion is the movement of particles from an area of ______ concentration to an area of ________ concentration.
low, high
high, low
equal, equal
none of the above
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Which of the following factors affect the rate of diffusion?
Pressure and volume
Friction and inertia
Temperature, concentration gradient, and surface area
Mass and velocity
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Which of the following is an example of diffusion in daily life?
Charging a mobile phone
The smell of perfume spreading in a room
Taking a photograph
Building a sandcastle
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What is the process called when molecules diffuse across a cell membrane through specific protein channels?
Osmosis
Transport
Facilitated diffusion
Active transport
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What is the term for the diffusion of water molecules across a selectively permeable membrane?
Osmosis
Respiration
Photosynthesis
Diffraction
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Why does diffusion occur?
To create energy
To achieve equilibrium and equalize concentrations
To generate heat
To produce waste products
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What is the role of diffusion in respiration?
Regulating body temperature
Storing genetic information
Allowing the exchange of oxygen and carbon dioxide in the lungs
Generating ATP
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How does diffusion differ from active transport?
Diffusion requires energy, while active transport does not
Active transport occurs in cells, while diffusion occurs in tissues
Diffusion is passive and does not require energy, while active transport requires energy
Active transport occurs in bacteria, while diffusion occurs in plants
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What is the role of diffusion in digestion?
Producing enzymes
Breaking down food into nutrients
Absorbing water
Allowing the absorption of nutrients from the digestive system into the bloodstream
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What is the net movement of particles in diffusion?
From an area of high concentration to an area of low concentration
From an area of low concentration to an area of high concentration
Particles move randomly in all directions
Particles do not move
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