The most important regulator of electrolyte concentrations in extracellular fluids is . A. cortisol B. aldosterone C. glucagon D. insulin

The correct option is B. aldosterone

Explanation:

In organisms the most important electrolytes from the point of view of their concentration, therefore, of their osmotic effect, are the sodium and potassium ions. Aldosterone is a hormone produced by the adrenal glands, it helps to control blood pressure and it maintains healthy levels of sodium and potassium in the blood, preserving the balance of body fluids and allowing nerves and muscles to function well. The renin hormone, produced by the kidneys, normally stimulates the adrenal glands to release aldosterone.

osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.