Answer:
Proteins, liver, osmotic pressure/oncotic pressure,  into the blood, decrease / drop.
Explanation:
Example of plasma proteins are Albumin,which forms  the largest percentage.others are globulin fibrinlogen,fibrin, peptide hormones etc They are synthesized and produce by the liver.
Apart from the transport , and immune response function, the physiological function of  Plasma protein is the formation of oncotic pressure which  helps to retain fluid in the blood, thus prevent the escape of water and body fluid through the capillaries membranes,endothelial and fenestration,  as hydrostatic pressure forces  blood through the capillaries for  exchange. <u>This increases osmotic potential of the blood plasma in relations to surrounding cells and tissue.</u>
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In absence  of Plasma protein, the oncotic pressure drops, and as blood flow through the capillaries exchange the hydrostatic pressure  of the blood forces water and fluid out  from the capillaries into the cells, leading to swelling of the cells (Oedema.)