Diffusion Flashcards
What is diffusion?
Diffusion is the movement of a substance from higher concentration to lower concentration .
Where does diffusion occurs?
Diffusion occurs in liquids and gases when their particles collide randomly and spread out.
Why is diffusion an important process?
Diffusion is an important process for living thing it is how substances move in and out of cell.
What partical model?
The partical model is to explaining where partical moves and glid.
Why does diffusion happen faster in gases than is liquid?
The particles is gases have more energy and are more widely spaced out than the particles in a liquid.
Why doesn’t diffusion happen in solid?
Diffusion doesn’t happen in solid because the particles in a solid cannot move arround , instead they vibrate about a fixed position.
What does motion of particle cause?
The motion of particles causes them to bump into each other, and this moves them all around.
What is rates of diffusion?
If there is a big difference in concentration between two areas, diffusion will take.
What happen if there is small difference in concentration?
If there is only a small difference in concentration between two areas, the net movement by diffusion will be quite slow.
What does an increase in temperature mean?
An increase in temperature means the particles in a gas or a solution move around more quickly.
Who diffusion happen in living organs?
It dissolved substances move into and out of your cells by diffusion across the cell membrane. These include simple sugars, such as glucose, gases such as oxygen and carbon dioxide, and waste products such as urea from the breakdown of amino acids in your liver.
What urea passes from liver cells?
The urea passes from the liver cells into blood plasma and is excreted by in kidneys.
Who respiration help to pass air in our lungs?
The oxygen you need for respiration passes from air in your lungs into your red blood cells through the cell membranes by diffusion.
What happen when oxygen move down a concentration?
The oxygen moves down a concentration gradient from a region of high oxygen concentration to a region of a low oxygen concentration.
Who oxygen move by diffusion?
Oxygen then also moves by diffusion down a concentration gradient from the blood cells of the body where it is needed.
