Blood Definition and 334 Threads

Hi Bactriophages can cross the blood brain barrier but do all of them cross? They are very diverse.

Hello everyone, I need your help. A teacher once told me that blood is a non-Newtonian, rheopectic, pseudo plastic fluid. I get the non-Newtonian/pseudo plastic part, but I can't understand why blood is rheopectic...is it or not? Thanks

Hello everyone, concerning blood pressure , we know that the pressure exerted by moving fluid has two components: a dynamic, flowing component that represents the kinetic energy of the system, and a lateral component that represents the hydrostatic pressure (potential energy) exerted on the...

Hello, I have some trouble understanding the role of the sympathetic nervous system in vasoconstriction and vasodilatation of blood vessels, I searched and found contradicting resources, does anyone have the right answer?

Hello I am a physiology student who is curious about the physics underyling blood flow and pressure. I have taken physics classes however at the elementary level the focus is on ideal fluids in systems with no friction. I would appreciate any answers or if you could point me in the right...

Viral particles linger in brain cells. The analysis detected much higher average levels of two SARS-CoV-2 viral proteins they measured—the nucleocapsid protein and the spike protein—in blood plasma samples collected between six and 12 weeks after diagnosis from patients infected with COVID who...

At first I tried plugging everything in with 60Hz in the numerator but that did not work. I was told to think about sinusoidal waves and derivates but I'm not sure how that works. Any ideas? Thanks a lot

Hello guys, can anyone help me to understand why an increase in peripheral resistance causes an increase in the blood pressure? If we assume the equation Delta P = R times Q If we assume Q is constant, the greater the resistance the greater the the decrease in pressure, so the pressure should...

So I'll try to be brief. There is a recent study that is titled "Immune imprinting, breadth of variant recognition, and germinal center response in human SARS-CoV-2 infection and vaccination" https://www.sciencedirect.com/science/article/pii/S0092867422000769 Among other stuff it has measured...

I've wanted to check the accuracy of my Blood Pressure Monitor (BPM) (an automated Omron unit), and finally found this old (2016) thread on another site (linked below). Prior to this, I only found the less helpful 'compare the reading to your Doctor's office' (BP varies with every reading, not...

My wife asked me a good question, and even with moderate Google searching I couldn't answer her question about how the patches are installed in arms. How do these BGL monitoring patches work? Thanks...

I have old cuts I put rubbing isopropyl alcohol on it, it cleaned slowly and vanish the blood clots, I would likes to know can isopropyl alcohol Blood clots soluble?

The blood groups of 200 people are distributed as follows: 40 have type A blood, 75 have type B blood, 60 have type O blood, and 25 have type AB blood. If a person from any of the group is selected at random, what is the probability that this person has an O blood type? How about the AB blood...

I did (1300)(9.81)(0.67) and got 8544.51 N/m^2 but unsure if that was the correct route to take. Please confirm or deny if I was approaching it in the correct way!

Suppose a blood test shows a value of 41 milligrams per deciliter, with a healthy range between 65-175, yet the hemoglobin levels in the same blood test are perfectly normal, as well as are other indicators in the blood test. A doctor explained that one would not need to be worried about the...

Hi all! :) I'm a physician who regularly punctures blood vessels with needles. This is successful when the needle punctures the superficial surface to enter the lumen, but does not puncture the deep surface. If this happens, nearby structures (lung, nerves, heart) are damaged. Increasing force...

Why do blood urea nitrogen (BUN) increases with age ? Can it be decreased?

Hi everyone I'm writing a story in which someone passes out from blood loss before they are found and saved. How long might a rescuer have before the victim dies? I'm guessing there might be a lot of variables here, but I'm just looking for the longest possible realistic delay. Also, if...

The New England Journal of Medicine published two papers showing data for successful treatment of a handful of patients with sickle cell disease or β- thalassemia using gene therapy techniques. Both teams used the strategy of inhibiting the BCL11a transcription factor in blood cells, which...

Absolutely no idea how to go about this question. An answer with an explanation would be highly appreciated. Thanks!

We know that we humans have roughly 5 liters of blood circulating in our body. The volume also may be varying. We also know that its volume is tightly regulated and multiple organs are involved in it. My question is, how we calculated that we have 5 liters of blood? Is it an approximation or...

Blood glucose is measured and compared against a set of standard/normal values (like, fasting 100 mg/dL etc) to determine if a person has hyperglycemia or not. Similarly Blood pressure readings (systolic & diastolic) are also compared against another set of standard/normal values like 120/80...

The Journal of the American Medical Association (JAMA) today (7/28/2020) published an article on using presence of phospho-tau217 (p-tau217) in blood plasma to detect Alzheimers Disease. Over 80% specificity, and early results look like it could be predictive up to 20 years...

Statins are often prescribed by doctors to people who have a high level of LDL in their blood. I have also read that statins help in boosting HDL to some extent, but that is not of interest in this thread. Consider the case where a person has been prescribed statin by a doctor. After two...

hello all : there was this technology that i read about maybe a year ago, could it help in better technology fast and reliable method to detect corona virus in saliva or in blood ? http://web.mit.edu/degenlab/index.html http://web.mit.edu/degenlab/degenlab_techniques.html...

I came across some articles about the health hazard from broken mercury-based sphygmomanometers. This led me to think about vapor leakage from good devices during normal operation. The top of the glass tube is at ambient atmospheric pressure. There is supposed to be a membrane at the top that...

Was wondering this for a scifi alien race I have in mind, is it chemically possible to have a race with combustible blood.? The answer: Yes, but I wonder how close the blood will be to our own? Since oxygen carrying blood like ours is preferred since it can deliver more energy for the work the...

Scientists in Japan create an artificial blood that could potentially be given to all blood types. https://www.iflscience.com/health-and-medicine/japanese-scientists-create-artificial-blood-that-could-potentially-be-given-to-all-blood-types/

Hi, I was studying soft matter physics when a question arose between a friend and me. Namely if red blood cells can be considered to be a colloid. Colloids as it was presented to us had 3 criteria: high diffusion so the particles wouldn't form a sediment, a small reynolds number and a surface...

This is the official thread for my scifi project Blood Moon (running name, likely to change) **Since my earlier thread got moved here, I might as use this new thread as a starting point for the whole project, and limit usage of the other threads for more specific inquiries about certain...

Hello! Is the blood supply to an organ done exclusively by one (or more) distinct arteries or there is extensive collateral supply from different arteries? For example, is lungs' circulation only from bronchial and pulmonary arteries/veins or there is collateral blood circulation as well from...

AB people don't have agglutinins anti A or anti B so it might seem they can receive any type of blood. But if the donator is A for example, it's own blood will have agglutinins anti B that will agglutinate the AB blood. So why can AB people receive blood from non AB people?

Homework Statement A Doppler flow meter is used to measure the speed of red blood cells. The frequency of the apparatus is f = 12 MHz. The sensor in the apparatus measure 1.8 kHz beats between the emitted frequency and the frequency of the ultrasound reflected back by the blood cells. The speed...

Hello, Once reading about renal function I think, I read that there are actually parts from organelles circulating in blood that have a specific name. They also function as messengers. But I cannot find anything about it now, any idea?

1. The question... "Blood is a conducting fluid. When flowing through an artery of diameter 10mm which is subject to a constant magnetic field of strength 60mT, an e.m.f. of 0.3mV appears across the width of the artery. Calculate the speed of the blood" 3. The solution... The solution given...

Homework Statement The average pressure of the blood in a person’s arteries is 100 mmHg. What is the average pressure in an artery in the head of standing person 40 cm above the heart? (blood density= 1.05x103 kg/m3,Mercury density = 13.6x103 kg/m3 and g=10 m/s2) Homework EquationsThe...

I have read that a shark has great sensitivity to smelling blood from a large distance. In an open, calm sea, just how fast can blood molecules diffuse through sea water for a shark to detect??

My supposed malamute/golden eyes (75-25%) Wolf eyes... My dog again.. She exhibits several signs of characteristic wolf behavior including hypersensitivity to stimulus, is extremely skittish etc Would you bet she has 5-10% actual wolf blood in her when the results are in?

With the advances of science, will it be possible to turn red cells into sperm or turn them into eggs to help a man who has lost both testicles or a woman who has lost her ovaries?

When I free dive (skin dive without a scuba air tank), I've noticed that by the time I get out of the water after about an hour (abalone diving or just recreational free diving), I feel like Jello and my blood pressure (BP) feels very low. I feel extremely relaxed and warm and happy. And after...

Hello, My book illustrates characteristics of different types of hypoxia in this table Arrows directed upwards indicate an increase and vice versa. I know what each type of hypoxia is, but I find a difficulty understand the change in venous PO2, O2 content and saturation of hemoglobin in...

Here is a CNN article about James Harrison, a guy in Australia, who started donating blood when he was 14 (after he had an operation and required blod transfusions). He has aged out of being acceptable for donating blood at 81. He is considered the GOAT (Greatest Of All Time) Australian blood...

I have a patient that I have known for a long time, and her Korotkoff sounds have always been pretty typical in volume when I've taken her blood pressure. But after a recent medical incident, her doctor has put her on a long-term blood thinner medication. I was taking her BP a couple of days...

I have a small question regarding pregnant mother's blood types and infant's blood types. We all know the if an Rh-ve mother carries an Rh+ve child, there is a possibility that their blood may mix during the delivery. This may induce some (Rh D) antibodies in maternal blood. In case the same...

Legit question. When we get a cut or scrap, blood comes out. In a few moments the blood dries and forms what looks like a layer of dried blood that gets a darker color. If that happens, why doesn't blood dry inside our bodies?

High blood pressure can affect health in many ways. No one treatment can control it in all cases. Treating immune cells may help control it. Science mag news article here.

I just wanted to see anybody's opinion on the super blue blood moon yesterday night (at least for me). I couldn't catch a glimpse of it in Sydney since it had been very hot for a few days and clouds had taken over the sky. I could however see an unusually bright red tint in one area of the...

Science magazine news reports on a blood assay for a number of cancers, done all at once. It detected between 33% and 98% of cases with <1% false positives. it uses a combination of detecting DNA and proteins.

Can laminar and turbulent flow be used to explain dripping blood? Be it blood dripping from a weapon/ impacting on an uneven surface?

Hi, I am studying about blood pressure. And I have some questions. The blood pressure in the left ventricle is about 105mmHg, and that in the right atrium is about 0 to 2 mmHg, Why do pressures decrease through our vasculature? And what kind of pressures are the pressures in the blood? Is it...