State body fluid distribution. What are the volume disorders? How hypovolumia is corrected by the body?

Body fluid distribution:

Regulation of body water content and osmolality:

1.      Hypothalamic thirst mechanism

2.      Osmoreceptor ADH mechanism

3.      Renin angiotensin system

Volume disorders:

A. Hypovolumic disorders

1.      Isotonic volume contraction

2.      Hypertonic volume contraction

3.      Hypotonic volume contraction

B. Hypervolumic disorders

1.      Isotonic volume expansion

2.      Hypertonic volume expansion

3.      Hypotonic volume expansion

How body correct hypovolumia:

1. Renal body fluid feedback mechanism:

↓Body water → ↓Blood volume → ↓Blood pressure & ↑ECF Osmolarity → ↓Blood supply to kidney & ↑ADH secretion → ↓Urine volume → ↑Body water.

 2. Renin-angiotensin mechanism:

3. Sympathetic nervous system:

4. Thirst Mechanism: