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How does increased aldosterone secretion increase blood pressure?
Your body can be divided up into a number of compartments, the first two being the intracellular and extracellular compartments. The two compartments contain fluid referred to as intracellular fluid (ICF) and extracellular fluid (ECF). By convention, blood is considered part of the extracellular compartment, so it contributes to ECF. One of the major determinants of blood pressure is the volume of blood in the blood vessels. All other things being equal, if you raise blood volume, you raise blood pressure; conversely, if you lower blood volume, you lower blood pressure.Since the blood is in the extracellular compartment, the blood volume is a component of the extracellular fluid. Therefore if you raise ECF, you raise blood volume; as we saw above, raising blood volume raises blood pressure. How aldosterone contributes to blood pressure is via the regulation of ECF volume.Sodium (Na) is the major cation in the ECF. Sodium is very important for the nervous system and other parts of the body; consequently, the body works very hard to keep the blood concentration of sodium within narrow limits. If suddenly the amount of sodium in the blood were increased, your brain would trigger the sensation of thirst; you would drink water and increase the ECF volume to dilute the sodium and bring it back within the normal range. So by adding extra sodium to the blood, you increase ECF volume. And what happens to blood pressure? It increases, because ECF is a major determinant of blood pressure.What does this have to do with aldosterone?Aldosterone is a steroid hormone that's synthesized by the adrenal gland. It acts on the kidneys to increase sodium reabsorption. Having more aldosterone around means that more sodium ultimately winds up in the blood, activating thirst mechanisms that cause you to drink water, which increases ECF volume and therefore increases blood pressure.You might be interested to know that the body really does use aldosterone to regulate blood pressure. When blood pressure drops, the kidneys sense a subtle change in blood flow and start secreting an enzyme called renin. Renin works through a pathway called the renin-angiotensin-aldosterone system (RAAS; see link at left) to ultimately increase aldosterone secretion in order to return blood pressure to normal.
What is responsible for gaining ECF from blood at the arteriole end and venule end?
Hydrostatic pressure is the force the gains the ECF from blood at the ends of the arteriole and venule. This process depends heavily on gravity for it to work properly.
How is sodium balance ECF volume and blood pressure are jointly regulated?
for blood to flow through a vessel or across a heart valve, there must be a force propelling the blood. This force is the difference in blood pressure (i.e., pressure gradient) across the vessel length or across the valve.
What is the abbreviation for the fluid outside the cell?
The fluid outside the cell is called extracellular fluid, often abbreviated as ECF. It includes interstitial fluid (between cells) and plasma (in blood vessels).
What is the ultimate hypotonic solution?
Solution that has lower osmolarity than blood when administering to patient *water leaves the blood and other ecf areas *and enters the cell
What does ECF stand for?
IT Is depend on the sentence that you are read it if in medicine and Physiology it is stand for Extracellular fluid or Effective Capillary Flow in pathology it is stand for East Coast Fever in hematology (of blood) it is stand for Eosinophil Chemotactic Factor
How does the ecf vary from the icf?
In terms of location,ecf vary from the icf in that they are separated by the cell membranes. In terms of composition, the intracellular fluids are high in potassium and magnesium and low in sodium and chloride ions.
When was ECF Saint Too Canaan College created?
ECF Saint Too Canaan College was created in 2003.
Exchange among subdivisions of ECF occurs primarily in the?
Exchange among subdivisions of the extracellular fluid (ECF) occurs primarily at the capillaries, where nutrients, gases, and waste products are exchanged between the blood and interstitial fluid. This exchange is facilitated by the thin walls of capillaries and the pressure differences between the blood and surrounding tissues.
What is the most abudant anion in the ECF?
The most abundant anion in the extracellular fluid (ECF) is chloride (Cl-).
What aprroximate osmolarity in ecf and icf?
The approximate osmolarity in the extracellular fluid (ECF) is around 290-310 mOsm/L, while the osmolarity in the intracellular fluid (ICF) is similar, ranging from 275-300 mOsm/L. The difference in osmolarity helps maintain proper cell volume and function.
What happens when a blood cell is placed into a 1.5 percent salt solution?
It is because the salt in the salt water will absord the fresh water in the cell, dehydrating it and making it shrivel up. The red blood cell shrivels up because of the process of osmosis. Water flows from an area of high concentration to lower concentration. If there is a lot of solute (picture a bunch of particles in water) then the water has a low concentration and a high concentration of solute. The RBC is sitting in extra cellular fluid (ECF). Within the RBC is intracellular fluid (ICF). If there is a lot of salt in the ECF or water like your example this means the fluid has a low concentration. Therefore, water from the ICF of the red blood cell will go out into the ECF so that its osmolarity will equal the osmolarity of the ECF. When more fluid goes to the ECF it is increasing it's concentration relative to the NaCl particles. Cells do this to maintain equality and balance.
