Chap 32-ECF Flashcards
What is needed to maintain ECF btwn vascular and interstitial spaces?
- Protein content of blood (ALBUMIN/GLOBULIN)
- Integrity of vascular lining/endothelium
- Hydrostatic pressure (pressure INSIDE blood vessels)
-Osmotic pressure (pressure outside blood vessels)
What keeps fluid within the blood vessels?
Hydrostatic & Osmotic pressure
What causes edema in the body?
Fluid shifts between hydrostatic and osmotic gradients
Most important and regulated aspect of fluid balance
VOLUME/ vascular volume in ECF
Insufficient vascular volume means
adequate BP is NOT being maintained
Why is adequate BP necessary ?
Adequate BP necessary for effective perfusion in body
the process of delivering fluid, typically blood, to an organ or tissue through the circulatory or lymphatic system
perfusion
Prolonged periods of low BP
hypovolemic shock
Physiologic factors in body that respond to changes in fluid balance
Baroreceptors/ Stretch Receptors
Anatriuretic Peptide Hormones (ANP)
Angiotensin-Aldosterone System
When atrial pressure increases, this is released to ____?
ANP is released to increase sodium excretion
When atrial pressure decreases, the release of ANP is inhibited. T or F
T- we want to hold onto the fluid that we have in the body
Enzyme released in response to decreased arterial blood pressure or low blood sodium levels.
Renin
_____ causes vasoconstriction
Angiotensin II
_____ causes sodium and water reabsorption
Aldosterone
Water follows Na+. T or F
True
