Tag Info

New answers tagged

2

The spleen is not the only organ which removes "old" erythrocytes, this happens as well in the liver and the lymph nodes. The whole process is termed Eryptosis, the Apoptosis of Erythrocytes. During the aging of erythrocytes sialic acid on their outer membrane surface is removed. This leads to the recognition by macrophages and phagocytosis of this cells by ...


1

This is not an answer to the question, but tangent comments that might be useful for how you look at the problem (and too long for a comment). First, for a question like this it is useful to look at other solutions to the same problem. For instance, the second most common molecule for oxygen transport is Hemocyanin, and this is not bound to cells but is ...


13

Hemoglobin molecules used to manufacture these products are not contained by a red cell membrane, and when released into the vasculature, these molecules rapidly scavenge nitric oxide.This can result in systemic vasoconstriction, decreased blood flow, increased release of proinflammatory mediators and potent vasoconstrictors, and a loss of ...


6

This is a well worded question. There are more reasons than the following but the most apparent is hemoglobin production and its transport. The erythrocyte is a cell whose structure is optimal for its function-the production and transport of hemoglobin. It lacks a nucleus and organelles so that it can devote almost 100% of its energy to hemoglobin ...


1

What determines blood types is the type of antigens found on the surface of the blood. A blood cells have A antigens on their surface, B has B antigens, AB has both, and O has no antigens. What is an antigen? According to Wikipedia: an antigen (Ag), or antibody generator, is any substance which provokes an adaptive immune response. An antigen is a ...


2

The blood type of people is determined by proteins which are anchored into the surface of the red blood cells. Cells can either express the A, B, A and B or no marker, resulting in the blood groups A, B, AB and 0. People which have a certain blood type (for example A) have antibodies against the other blood type (in this case B). This will lead to the ...


10

Typically transfusions are indicated for hemoglobin < 7 g/dL (for adults normally: 12-15 grams per deciliter [1]) or < 8-10 g/dL if there is cardiac disease where diminished oxygen carrying capacity cannot be compensated by increased cardiac output. The answer above is theoretical because there is no accurate way to measure blood loss in the clinical ...


8

What percent of your blood can you lose before you need a transfusion According to Wikipedia: starting with Class III (more than 30 % of circulating volume loss), hemorrhage requires transfusion. Class I Hemorrhage involves up to 15% of blood volume. There is typically no change in vital signs and fluid resuscitation is not usually necessary. ...



Top 50 recent answers are included