0
Are the rates of absorption and diffusion constant for all molecules?
Meganash85
no, the rates are different depending on the size of the molecule, the permeability of the membrane, the concentration gradient etc etc.
Wiki User
∙ 16y ago
No, the rates of absorption and diffusion are not constant for all molecules. They depend on factors like molecular size, charge, solubility, and membrane permeability. Larger molecules, charged molecules, and less lipid-soluble molecules typically have slower rates of absorption and diffusion compared to smaller, uncharged, and lipid-soluble molecules.
Add your answer:
Earn +20 pts
How does different tissues affect the rate of diffusion?
Different tissues have varying permeability to molecules, which impacts the rate of diffusion. Tissues with higher permeability, such as lungs or intestines, allow for faster diffusion due to more open pathways for molecules to pass through. In contrast, tissues with lower permeability, like skin or brain tissue, experience slower diffusion rates as molecules encounter barriers to passage.
Why diffusion is maximum in gases?
Diffusion is maximum in gases because gas molecules are not closely packed together like in liquids or solids. This allows gas molecules to move more freely and quickly, leading to faster diffusion rates compared to liquids or solids. Additionally, gas molecules have higher kinetic energy, allowing them to move more rapidly and spread out more easily through a medium.
How do you know deffusion takes place?
Diffusion can be observed by the movement of particles from an area of high concentration to an area of low concentration. This process happens spontaneously and is driven by the random motion of molecules. Additionally, diffusion rates can be affected by factors such as temperature, concentration gradient, and the size of the molecules involved.
Describe 2 properties of an exchange surface that would facilitate rapid diffusion rates?
Large surface area: A greater surface area allows for more molecules to come into contact with the surface, increasing the rate of diffusion. Thin membrane: A thin exchange surface reduces the distance that molecules have to travel to diffuse across the surface, speeding up the diffusion process.
How would describe the relationship between concentration of dye and the rate of diffusion?
The rate of diffusion is directly proportional to the concentration of dye. Higher concentration gradients result in faster diffusion rates, as molecules move from areas of high concentration to low concentration in an attempt to reach equilibrium.
What happens in diffusion if the temperature is raised?
If the temperature is raised in diffusion, the molecules will have more kinetic energy, increasing their speed and leading to faster diffusion rates. This is because higher temperatures cause molecules to move more quickly and randomly, resulting in greater collisions and diffusion of particles.
How might temperature or variations in temperature in the human body influence diffusion of materials in cells?
Temperature can influence the diffusion of materials in cells by affecting the kinetic energy of molecules. Higher temperatures increase the speed and energy of molecules, leading to faster diffusion rates. Conversely, lower temperatures decrease diffusion rates as molecules have less energy to move across cell membranes. Optimal temperatures promote efficient diffusion within cells.
How does gravity affect the rate of diffusion?
Gravity can influence the rate of diffusion by affecting the movement of molecules. In a gravitational field, heavier molecules may settle faster due to their weight, impacting the overall distribution of molecules. This can result in slightly slower diffusion rates in the presence of gravity compared to in microgravity conditions.
What has the author A PB Maasdorp written?
A. P.B Maasdorp has written: 'The application of the Etters diffusion equation to the rates of absorption of chromium by dyed and undyed wool'
Why do diffusion of a chemical is fastest in air than water?
Diffusion is faster in air than in water because air particles have more space between them, allowing molecules to move more freely and quickly. In water, the molecules are more closely packed, leading to slower diffusion rates due to increased interactions and collisions between molecules.
How does different tissues affect the rate of diffusion?
Different tissues have varying permeability to molecules, which impacts the rate of diffusion. Tissues with higher permeability, such as lungs or intestines, allow for faster diffusion due to more open pathways for molecules to pass through. In contrast, tissues with lower permeability, like skin or brain tissue, experience slower diffusion rates as molecules encounter barriers to passage.
How does number of protein channels affect diffusion in a cell.?
The number of protein channels in a cell directly affects the rate of diffusion of molecules across the cell membrane. A higher number of protein channels allow for more molecules to pass through, leading to faster diffusion. Conversely, a lower number of protein channels may result in slower diffusion rates.
What controls the rate of diffusion?
The rate of diffusion is controlled by factors such as concentration gradient, surface area available for diffusion, temperature, and the size of the molecules involved. A steeper concentration gradient, larger surface area, higher temperature, and smaller molecules generally lead to faster diffusion rates.
How does kinetic energy affect diffusion rate?
In general, higher kinetic energy results in faster diffusion rates because the particles have more energy to move and interact with each other. This increased movement leads to more collisions and exchanges between particles, accelerating the diffusion process. Conversely, lower kinetic energy will slow down diffusion rates as particles have less energy to overcome barriers and move through the medium.
How does temperature effect diffusion rates?
As temperature increases, the diffusion rate also increases because the particles or molecules have greater kinetic energy and move more rapidly. This leads to more frequent collisions and interactions between particles, enhancing the overall rate of diffusion. Conversely, a decrease in temperature will slow down diffusion rates due to the lower kinetic energy of the particles.
Why diffusion is maximum in gases?
Diffusion is maximum in gases because gas molecules are not closely packed together like in liquids or solids. This allows gas molecules to move more freely and quickly, leading to faster diffusion rates compared to liquids or solids. Additionally, gas molecules have higher kinetic energy, allowing them to move more rapidly and spread out more easily through a medium.
How do you know deffusion takes place?
Diffusion can be observed by the movement of particles from an area of high concentration to an area of low concentration. This process happens spontaneously and is driven by the random motion of molecules. Additionally, diffusion rates can be affected by factors such as temperature, concentration gradient, and the size of the molecules involved.
