One of the major physiological factors that triggers thirst is

Im not sure but heres what i got, a rise in the plasma idk

Explanation:

Which of the following hormones is important in stimulating water conservation in the kidneys?

Direct control of water excretion in the kidneys is exercised by vasopressin, or anti-diuretic hormone (ADH), a peptide hormone secreted by the hypothalamus. ADH causes the insertion of water channels into the membranes of cells lining the collecting ducts, allowing water reabsorption to occur.

What is the primary buffer in the plasma?

What is the primary buffer in the plasma? Bicarbonate is the form that CO2 is transported in the blood stream. Using carbonic anhydrase to shift between bicarbonate and carbonic acid, the pH of the blood stream can be quickly regulated.