Questions tagged [hematology]

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

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1answer
87 views

How does blood pressure substantially drop in the capillaries and arterioles?

Is this due to increased frictional resistance which decreases the velocity of the blood? You would think using Bernoulli's principle that the velocity of blood in the capillaries would increase due ...
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Would gargling with salt water every day increase blood sodium levels?

Would gargling and rinsing with salt water every day for a few minutes increase your blood sodium levels? Considering the fact that sublingual medication is a very effective way for introducing ...
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Does animal blood, esp. human, really have similar salinity as ocean water, and does that prove anything about evolution?

It is an often-repeated claim that human, and in fact all animal blood is salty because we evolved from aquatic organisms, and that blood has a similar concentration of salts as ocean water, or at ...
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Is there a purpose for nucleated red blood cells in reptile, avian and fish blood?

I have read, and read, and read documents on this subject but still have no conclusions. Everything I have read explains why mammals don't have a nucleus (to make more room for the haemoglobin and ...
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Where can I find extensive information on animal blood types and transfusions?

I'm interested in doing research on different animal blood types, including blood transfusion across different species. What are some resources you could recommend for me?
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Why do people with type O blood have anti-A and anti-B antibodies?

People with type O blood have anti-A and anti-B antibodies, even without receiving a transfusion. Why?
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What is the difference between Amino acids from blood and urine?

I would like to understand the difference between different tests for Amino Acids. Any blood laboratory offers amino acids tests using 3-4 methods Blood serum Urine Random Urine 24 hour (all the ...
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How much does capillary action contribute to blood flow to the human brain?

The BBC News Universal Wonders short video Why water is one of the weirdest things in the universe says after 01:50: Water molecules can float upwards against ...
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1answer
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Non-nucleated cell-like population with RNA

We're working on invertebrate hemolymph (blood) and we have found with flow cytometry (staining with DRAQ5) a cell-like population without nucleus but it has RNA production. Does anyone any ...
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1answer
151 views

Why are red blood cells not attacked by NK cells?

All cells containing a nucleus present MHC-I, while some specialized cells present MHC-II in addition to that. Since erythrocytes lack any MHC why do natural killer cells not attack them? It is my ...
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Is blood donation risky for patients with MGUS?

Monoclonal gammopathy of unknown significance (MGUS) is often considered a pre-cancerous condition. Blood donors with MGUS are typically advised to discontinue blood donation as their blood may be ...
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How are monocytes larger than capillaries?

I have read that the average size of a capillary is about 8 micrometers. How is it possible that the 15 micrometer or so monocytes in blood do not block these vessels? https://en.m.wikipedia.org/wiki/...
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Why the child is too much 'irritable' in Iron deficiency anemia?

Anemic children have irritable behaviour. But when I look into the cases of anemia in the wards, children having Iron Deficiency Anemia are more irritable than those children having other types of ...
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Can a person survive on blood in place of water?

This question: Can you get enough water by eating only fish? asks if a person could survive on fish alone. Can a person survive on fish and/ or blood alone of any species if stuck at sea or animal ...
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How can a child be blood type AB, if both of the parents are blood type A?

Basically, both of my parents are blood type A (both are confirmed and it's also certain both of them are my biological parents). I recently found out my blood type is AB. How is this possible? I ...
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What happens if an IV drip with a saline solution slips out of the vein, but keeps dripping into the body?

A patient has a saline solution IV drip into the vein. They have somehow moved around and the needle has fallen out of the vein, but remained in the body. Nobody has noticed and for a few hours water ...
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What part of food gives the blood red color?

Roughly, what I know is, when we eat food it goes into our: Stomach > Small Intestine > Large Intestine > Rectum. So, it just moves through a digestive pipe. What I don't understand is, what part of ...
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How are codocytes or target cells formed?

How are codocytes or target cells formed in conditions like Thalassemia? And why do they appear like a target(as in why is there a central red surrounded by pallor surrounded by red?)
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Could bone marrow transplants be used to prevent tissue rejection of trans-species organs?

So the immune system doesn't calibrate (for want of a better euphemism) to recognize it's own cells until fairly well along in fetal development & the major components of the immune system (...
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4answers
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Why does an increased heart rate mean increased blood pressure?

Say a person starts exercising. If their cardiac volume remains the same but their heart rate increases so that the overall result is an increase in cardiac output, will their blood pressure increase ...
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Blood groups - why is O the universal donor and AB the universal recipient? [closed]

I do not understand why individuals with type O- blood are often called universal donors and those with type AB+ blood are called universal recipients. My thoughts on this are: It should be that ...
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When endothelial cells in blood vessels (arteries or veins) are damaged, does atheroma form first or blood clot?

I have learnt from Khan Academy's video on atheresclerosis that when the endothelial cells of an artery are damaged, atheroma forms at the site, and if the atheroma’s fibrous cap is ruptured, ...
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What will happen if a foetus is Rh- and the mother is Rh+?

If a mother has Rh-negative blood and her foetus has Rh-positive blood it will result in rhesus incompatibility and lead to erythroblastosis fetalis. What will happen if the reverse occurs, when a ...
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How do veins's valve pocket sinus tend to become hypoxic?

For context, this question relates to the formation of deep vein thrombosis as I read that hypoxemia in vein can trigger coagulation cascade and cause a thrombus to form in vein. I read that vein's ...
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Is there other unknown-compound in Blood?

Blood is made of red blood cells, platelets, plasma etc. Let's say, then, there are these $x$ known compounds in blood. But how can one be sure that there is no other compound other than those $x$ ...
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Is there any advantage to one blood type over another?

All humans can be grouped into ABO and Rh+/- blood groups (at a minimum). Is there any advantage at all to one group or the other? This article hints that there are some pathogens that display a ...
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Realistic Application of CRISPR in Human Disorders

Human trials recently began to use the genome editing technology CRISPR to treat sickle cell anemia using edited stem cells. Sickle cell anemia is caused by a single DNA Mutation, and is also a ...
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Blood consumption

Is consumption of blood more "dangerous" compared to meat? There was a news-article about unnatural chemicals found in the blood of mothers. This reminded me about a question I have pondered upon ...
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Why does atheroma contain thromplastin/tissue factor?

From my understanding, when the endothelial lining of arteries is damaged, atheroma is formed at the site of the damaged area. If the atheromas is ruptured, thromboplastin contained in atheroma is ...
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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 ...
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What is the role of plasminogen used in the preparation of APSAC? (Anisoylated Plasminogen Streptokinase Activator Complex)

What is the role of plasminogen in APSAC, and how is there indirect activation of plasmin through APSAC? Reference https://www.sciencedirect.com/topics/chemistry/fibrinolytic-agent
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1answer
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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?
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Lobed Nuclei still count as One nucleus?

Do the Lobed Nuclei of immune cells (such as Megakaryocytes) still count as one nucleus?
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Where do Red Blood Cells use energy?

I know that RBCs use glycolysis of glucose to lactate to produce most of their energy, but, if they are just carrier cells, where do they use the energy?
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How does Bernoulli’s Principle apply to the cardiovascular system?

Below are graphs which illustrate the cross-sectional area, velocity, and fluid pressure through each vascular segment of the cardiovascular system. It makes sense that velocity and cross-sectional ...
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236 views

Is there a specific suffix for “within a cell”? i.e. in a similar manner to how -aemia refers to within the blood

Words like hyperglycemia and hyponatremia refer to the relative level of each component in the blood, not in the cell. Is there a suffix for within the cell? For reference I would like one word as an ...
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1answer
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Can Blood Types Change?

I recently heard a radio show where two callers claimed that their blood types had changed. One caller claimed that he was born O-, but recent tests said he was A+. Another caller claimed to change ...
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1answer
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Can blood that has had an anticoagulant added to it be boiled without coagulating?

If I understood the information I've found elsewhere correctly, you can't boil untreated blood without it coagulating, right? But what if you added an anticoagulant to it? Would it be possible to boil ...
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1answer
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What are the effects of oxygen toxicity in human blood?

I was reading some text on deep sea Physiology, and for to know that diving to do could cause oxygen toxicity in the blood. This was the exact text from the book Textbook of Medical Physiology by ...
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1answer
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In adverse effects of Heparin, why is bleeding from deeper organs more common?

The reason given in my book is that it i because it interferes with the secondary hemostasis..but i did not understand how that implies that bleeding from deeper organs is more common..
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How does the cardiac cycle and electrical activity all relate to blood pressure in the heart? [closed]

I know how the cardiac cycle works and understand the electrical activity in the heart such as the AV nodes, SA nodes and Bundles, but how do they work together in relation to blood pressure?
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Are there endoscopic technologies for blood vessels?

Endoscopic procedures are used to look inside cavities like intestine, esophagus etc. Is it being used to look inside blood vessels?
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Does blood carry metallic nanoparticles?

I find this particular chart about constituents of blood very informative and interesting. Looking through the different components, I see metals such as copper, zinc, etc. Are these only carried as ...
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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 ...
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Time lapse between fresh blood's exposure to air and that same blood turning darker red-brown

For investigative purposes, I'm searching for a tool that can be used as a quick visual assessment of the the length of time that blood has been exposed to air after the blood flow has stopped.. Let's ...
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How does vasodilation slow blood flow?

During inflammation, cytokines and histamine cause vasodilation to increase blood flow to the inflamed area. However, it is also said that vasodilation slows blood flow which facilitates the adhesion ...
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Can a cancerous cell from outside cause cancer in a healthy person?

If a cancerous cell enters the body of a healthy person from someone else's blood or something, will that healthy person get cancer? In human beings.
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Why is there low hepcidin levels in hemochromatosis?

If hemochromatosis is iron overload and there is excess iron in the blood, why does the liver reduce hepcidin secretion (which increases the iron uptake) furthering the worsening of hemochromatosis?
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What's the difference between a lymphocyte and a plasma cell?

According to my understanding, lymphocytes is the broad terminology for both T lymphocytes as well as B lymphocytes, while plasma cells refers to mature B cells which produce antibodies. But then why ...
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Why is beta thalassemia major not lethal while alpha thalassemia with loss of all 4 genes lethal?

So why is beta thalassemia major with two B0 alleles not fatal in utero (despite the hemoglobin not having any B chains), while alpha thalassemia with deletion of all 4 genes encoding for the alpha ...