Quality Assurance (QA) Associate Salary. Average Quality Assurance Associates in the United States make around $49K per year. Cash earnings for Quality Assurance Associates â including $5K in bonuses and $6K in profit sharing proceeds near the top of the pay scale â generally stretch from $27K to $67K depending on individual performance.
Facilitated diffusion is the flow of molecules down a concentration gradient, across a membrane, but requires the help of a protein. There are two categories of proteins that assist facilitated diffusion: carrier proteins and channel proteins. Carrier proteins are like taxi cabs in a cell membrane.
[2]. Facilitated diffusion is a form of passive transport that uses no energy for the transport of molecules and substances through the membranes of cells. It is largely aided by proteins that are an integral part of the membrane.2]. Facilitated diffusion is a form of passive transport that uses no energy for the transport of molecules and substances through the membranes of cells. It is largely aided by proteins that are an integral part of the membrane.