Biology Stack Exchange
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Questions tagged [hematology]

The study of blood, the blood-forming organs, along with blood diseases and their treatment.

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311 questions
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Why is the bond between oxygen and iron in hemoglobin at a specific angle?

The bond between oxygen and iron in hemoglobin is usually drawn at an angle of about 120 degrees to the O=O bond. Why?
user3711
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How to translate a blood type used in Eastern Europe?

What are the I-IV blood type descriptions shown below (commonly used in Eastern Europe), and how do you translate them into the ABO-system?
MikeF
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What percent of your blood can you lose before you need a transfusion

Losing a little blood is okay. If your a normal healthy person, and got into an accident, how do they know if you need a transfusion or if you'll be okay? This is hypothetical.
CognisMantis
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Is it possible to condition the body to reduce bruising?

I do combat sports, and in these sports there are a lot of hits that can cause bruising. I've found that, over time, physical conditioning can reduce and/or eliminate the bruising to the point where even after hard impacts, there is no residual…
me2
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Why does blood come from mouth when people are shot in the chest area?

In almost every movie scene when a character is shot in the chest area, some blood comes from his mouth or sometimes even coughs blood before he dies. Are these kind of scenes realistic/possible? If yes, why does blood come from mouth in this…
hkBattousai
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4
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Why don't individuals with sickle cell trait suffer from sickle cell anemia?

Ostensibly, in people with sickle cell trait, half of the hemoglobin in their body would be defective. Is it actually the case that sickle cell hemoglobin is produced in equal amounts? If not, how is that regulated? If so, how does that still not…
jimbotron
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Does drinking water from stainless steel increase hemoglobin?

I'm pretty sure iron molecules will be present in water. Cooks who use iron or stainless steel pots increase the amount of iron they consume
Marina Dunst
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Why is thrombin time longer than prothrombin time?

Thrombin time (TT) and prothrombin time (PT) are two different clinical measures of blood plasma coagulation. Both clotting tests end with the conversion of fibrinogen to fibrin; however, the TT skips directly to this conversion by adding thrombin…
Lola Harara
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Could You Boil Water from Blood?

According to Wikipedia... About 55% of blood is blood plasma, a fluid that is the blood's liquid medium, which by itself is straw-yellow in color. The blood plasma volume totals of 2.7–3.0 liters (2.8–3.2 quarts) in an average human. It is…
Zulfe
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why does blood when oxidized over time become bluish green?

Oxygenated blood is bright red and deoxygenated blood is dark red or brown. If you take oxygenated blood and leave it in the air it will turn dark red, then brown, then finally a bluish green from exposure to atmospheric oxygen. Why does it oxidize…
Caters
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How much does donating blood affect the amount of oxygen in your blood stream at high altitude?

I am a regular blood donor and I am also a skydiver. We normally go to around 13,000 feet AGL (above ground level). Depending on how high above sea level the ground is, altitudes could be as high as 15,000 MSL (mean sea level) before a jumper is…
Charles Wesley
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Do High Triglycerides Invalidate Tests for Infections?

Blood donation websites tell you to avoid eating fats a few days before the donation, because when there is a lot of fat in the blood, they can't test for infectious diseases and must discard the blood. Does that mean that if you have, say, high…
A Guest
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Why oxLDL accumulate to form foam cells?

In atherosclerosis, why macrophage store all the cholesterol from oxLDL inside, and turns to foam cell, and not just degrade it and going back to blood? (there are some amount that leave the plaque, but much more stay (J Clin Invest. 2011…
Robertos
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Why do you need the intrinsic pathway when you have faster extrinsic pathway?

There are two pathways in blood clot fromation; the extrinsic pathway and the intrinsic pathway. The extrinsic pathway is faster than intrinsic pathway because it has less number of steps. So, why do we need intrinsic pathway then?
Rafique
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Are there health benefits to donating blood?

Donating blood is typically thought of as a commensal act, benefiting the recipient at no cost beyond time and inconvenience to the donor. Some even view it as a parasitic act, wherein the recipient benefits at some health cost to the donor. But it…
Tal
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