Large proteins or plasma proteinsplasma proteinPlasma proteins
meat
Large proteins are typically found in plasma due to their size and charge, which prevents them from passing through the glomerular filtration barrier into the tubular fluid. The glomerular filtration barrier only allows small molecules and ions to pass through, while larger proteins are retained in the bloodstream.
Lymph is actually plasma without plasma proteins. Lymph is formed when plasma oozes out of the minute pores of the capillaries. Since plasma proteins are too large to go through the pore, lymph is devoid of any plasma proteins.
Proteins
Proteins are found in plasma but are generally not present in the tubular fluid of the kidneys due to their large size. However, small proteins may be filtered into the tubules under certain conditions.
... is called "facilitated diffusion".
Bone marrow
Bone marrow
Facilitated Diffusionosmosis & diffusion
Proteins do not pass through plasma membranes because they are too large and complex to fit through the small pores of the membrane. Additionally, the membrane is selective in what it allows to pass through, and proteins typically require specific transport mechanisms to enter or exit the cell.
Channel proteins are on the plasma membrane, selectively transport the solutes such as ions, small and large proteins across the membrane. Carrier proteins also membrane proteins that allow diffusion of different molecules. Both proteins are chemically made up of amino acids.