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Why there is oncotic pressure difference between atrtereoles and venules?
Wiki User
∙ 10y ago
Oncotic pressure is the pressure exerted by colloid particles. As colloid particles do NOT leave the blood vessels oncotic pressure is SAME in arteriole and venules.
Wiki User
∙ 10y ago
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What causes Plasma oncotic pressure?
The capillary oncotic pressure is higher because of the plasma proteins trapped within the capillaries. The high oncotic pressure pulls the water from from the interstitium into the capillary.
Blood plasma becomes tissue fluid by the process of?
By the process of ultra-filtration. At the proximal end of the capillary, you have pressure of about 30 mm of mercury. So the fluid leaves the capillary and enter the interstitial compartment. At the distal end of the capillary the pressure is about 15 mm of Mercury. The fluid in drawn in due to oncotic pressure at that end.
How is the heart involved in pulmonary circulation?
Right side of the heart is involved in pulmonary circulation. This circulation is called, at times, as lesser circulation, as against the greater or systemic circulation. Blood that flows through the lesser and greater circulation is same in amount. But there is gross difference between the two. You have interstitial compartment in the systemic circulation. This is maintained through high blood pressure there. You do not have the same in pulmonary circulation. What you need here is simple blood flow, with out formation of the interstitial compartment. For that you have blood systolic blood pressure of about 25 mm of mercury. The blood pressure in the capillaries is about 15 mm of the mercury. The oncotic pressure of the blood proteins is about 22 mm of mercury. So very little fluid is leaked out to keep the alveoli wet. Some times in diseased condition more fluid is leaked out in the alveoli, to give rise to pulmonary oedema.
What role does protein play int the prevention of edema?
Proteins in solution (eg. in blood) bind a lot of water around them, thus preventing excessive amounts of water to be present in tissues or in peritoneal cavity etc. When the blood is low on proteins (for instance in a case of malnutrition), blood doesnt have the "power" (so called oncotic pressure) to hold water, which can lead to an edema or a collapse of cardiovascular system. This can be demonstrated for instance on some photos of African children suffering from malnutrition (in this case a diet very low on proteins), who have big bellies (water accumulating in peritoneum due to low blood oncotic pressure) and are therefor looking as if they were kind of fat. This symptom is called Kwashiorkor.
How does diffusion functions in the exchange of substances between blood and tissues?
Circulatory system is closed system exept at cappilory level. Here fluid leks out at proximal end of capillaries. It carries with it oxygen and digested food materials, disolved in plasma except plasma proteins. They are supplied to tissue cells and in return you get the carbon bi oxide and wasre products of metabolism. They reenters the circulation at distal end of capillary. At proximal end of cappilary, you have about 30 mm of mercury blood pressure and at distal end it is about 20 mm of mercury. Fluid is pulled back due to oncotic pressure of plasma proteins.
What is the difference between Osmotic and Oncotic pressure?
osmotic- pressure exerted by large molecule oncotic- presure exserted by proteins
What causes Plasma oncotic pressure?
The capillary oncotic pressure is higher because of the plasma proteins trapped within the capillaries. The high oncotic pressure pulls the water from from the interstitium into the capillary.
What is Increased colloidal oncotic pressure?
colloidal oncotic pressure is also called colloidal osmotic pressure which is exerted by the proteins...proteins are also called colloids
What determines plasma oncotic pressure?
i haveNO idea:P
The presence of plasma proteins in the blood increases its?
oncotic pressure
What is normal blood oncotic pressure?
30
What is the ability of plasma proteins to maintain plasma water volume called?
oncotic pressure
What is the gradient called that is the driving force for the movement of water and dissolved solutes from the arterial ends of blood capillaries?
The blood pressure in the capillaries at arterial end is about 25 to 30 mm of Mercury. The oncotic pressure of the plasma proteins is about 22 mm of mercury. So there is net force, which drives out the fluid in the interstitial space. The fluid is sucked back at the venous end of the capillaries by the oncotic pressure of the plasma proteins. It should be called as pressure gradient.
Where is albumin transported to?
In the blood plasma? it's a crucial component of it. Important as carriers and maintaining oncotic pressure.
Which forces affect the exchange of substances between blood and tissue fluid?
At the proximal end of capillary, you get the fluid out in the tissue fluid due to blood pressure. At the distal end of the capillary, you get back the tissue fluid due to oncotic pressure of the blood proteins.
What is the effect of hypoalbuminemia?
Hypoalbuminemia can result in kidney or liver failure. It can also cause lowered oncotic pressure and swelling throughout the body.
What is the difference between apoptosis and necrosis?
Apoptosis is cell death via shrinkage, whereas oncotic necrosis is cell death via swelling. The term necrosis was used for cell death before these two different processes (shrinkage and swelling) were discovered. For this reason, it is still sometimes used to refer to both apoptosis and oncotic necrosis. However, necrosis is also sometimes used to mean only cell death via swelling. To avoid confusion, it is best to use the terms apoptosis and oncotic necrosis (and not just 'necrosis').
