How does plasma proteins and the water in plasma help to maintain homeostasis in the body?
Nature has selected water as a medium for life. Without water you can not survive. plasma proteins are there to maintain the osmotic pressure of the blood. Without plasma you can not get back the interstitial fluid into the circulation. Apart from this plasma proteins have few more functions to perform.
Which portion of the renal tubule reabsorbs electrolytes plasma proteins nutrients vitamins and water?
Plasma Proteins. Although Plasma is 92% water, that is the solvent in Plasma. Plasma proteins make up 7% of the whole Plasma volume as solutes. And other miniscule solvents make up the remaining 1%. Some Plasma proteins are Albumins, Globulins (Hormone-Binding Protein, Metalloproteins, Apolipoproteins, Steroid-Binding Proteins), Fribinogen, other varying Plasma Proteins and Peptide Hormones (Insulin, PRL, TSH, FSH, LH). (Fundamentals of Anatomy & Physiology, Martini, pages 640-642).
Feature of the plasma membrane that maintains homeostasis within a cell by allowing some molecules into the cell while keeping others out?
Homeostasis is all of the collective internal functions of an organism that help to maintain all of the conditions needed for survival. (Example: Some cells may be low on water and others may have too much, so osmosis occurs across cell membranes to maintain normal water levels and to promote homeostasis.)