Blood Definition and 324 Threads

So I was arguing with this person online about something and then all of a sudden they decide to throw out something along the lines of "you're so cold-blooded". They were correct. In school we were always taught your average body temperature is 37 Degrees Celsius but mine is like 36. Therefore...

I came across this MCQ in my book, it says: Iron deficiency anemia... i) is of hypochromic, macrocytic type. ii) is commonly associated with chronic blood loss. iii) is common cause of anemia in infants below 1 year. iv) may increase the number of megaloblasts. v) is more common in males. I...

Hemoglobin works as a buffer. It has 6 times more buffering power than plasma proteins. My book says that Hemoglobin carrying CO2 (deoxyHb) is a stronger buffer than Hemoglobin carrying O2, because deoxyHb dissociates less (i.e. it forms a weaker acid = a stronger buffer). I don't understand...

This article from the NY Times describes new ways to treat blood cancers (cancers of blood cells). Some of these may be approved in a few months. They involve manipulating immune system cells (also a form of blood cells) to get them to attack the cancer cells, while trying to avoid unintended...

Hi PhysicsForums, Why would a parallel circuit(or in blood) decrease resistance? Here is my thought experiment and where I got stuck: Say from aorta to one arteriole, the resistance is super high on that flow(this big amount of flow is entering a tinier area), but add more arterioles and we...

I am having trouble understanding why blood flow rate is constant between the aorta and the sum of capillaries/sum of the arterioles. I keep thinking that in the arterioles or capillaries there is a decrease in velocity and somehow this decrease in velocity will decrease the total amount of...

I have been editing my Kepler Bb story and after Robin gets a nasty stomach bug that causes projectile vomiting and thus abdominal muscle soreness he has this pain all over his body. The stomach bug lasts for 5 days and it is an unknown pathogen(Possibly a super version of salmonella since he...

Homework Statement Fast-flow blood warmers (pictured below) can be used to heat blood products (carefully and uniformly) when rapid, high-volume transfusions are necessary, in order to prevent hypothermia in the patient. The blood product density and specific heat can be assumed to be 1.12...

Why do white blood cells die and what cause them to destroy within a few (20-30) hours? I have an other question also that if red blood cells remain within capillaries, veins and arteries then how do they pass onto liver cells for the breakdown or they die within veins, capillaries and arteries?

I have an alien in one of my stories that bleeds. I want to use science to determine what the range of possible colors would be. It's an oxygen breathing alien, so it's blood has to be efficient at transporting it. I know our blood is red because we use iron to do that. I don't know enough...

Homework Statement The minimum volume occupied by nanocontainers in the blood is 2.0L. Is such a volume feasible, given that the total blood volume in an adult is about 5L? Homework EquationsThe Attempt at a Solution So I already solved this question (parts a-e) for the minimum volume occupied...

I have this curiosity about how easy or difficult it has to be to find out everything that is in a person's blood. Through all the tools we have available today, would it be possible to find out what is in our blood? From TSH to blood sugar, to cholesterol, isn't there a simpler way of finding...

Hi everyone, I have been hunting all over the Internet for an explanation to changes in the blood pressure when sitting, standing or lying down. I know the complex mechanisms that are involved but I need an equation for an ideal system with the heart in the middle and the pressure that needs to...

Homework Statement A person has a 5200 N/m^2 gauge pressure in a 0.01m radius artery, with blood flowing at 0.5 m/s. the gauge pressure outside the artery is 3200 N/m^2. When using her stethoscope, a physician hears a fluttering sound farther along the artery. the sound is a sign that the...

Homework Statement The blood that circulates in our body is about 1/12 of our mass. If the kidneys filter 7.5 liter of blood a hour, then how many times does it filter in the kidney the whole blood of a person will mass 60kg? Homework Equations 1/12*60=5 liter blood The Attempt at a Solution...

Homework Statement 100 ml blood of lung vein contains 14 ml O2. The volume of blood in the left ventricle is 70 ml. Find the amount of O2 the blood absorbs in the lung for a minute. Homework Equations 100ml blood -> 14 ml O2 70 ml blood -> x The Attempt at a Solution Here's what I did 100ml...

The blood that circulates in our body is about 1/12 of our mass. If the kidneys filter 7.5 liter of blood a hour, then how many times does it filter in the kidney the whole blood of a person will mass 60kg? Here's what my teacher did: 1/12*60=5 liter blood 0.55*5=2.75 liter plasma of blood. The...

They say that the Rh+ve blood group baby if developing can stimulate an immune response in the mother (Rh-ve) but the first baby won't be affected, My question is actually when exactly the Rh antigen comes in contact with the mothers blood?

100 ml blood of lung vein contains 14 ml O2. The volume of blood in the left ventricle is 70 ml. Find the amount of O2 the blood absorbs in the lung for a minute. Here's what I did 100ml blood -> 14 ml O2 70 ml blood -> x x=0.98 ml O2 The heart beats 70 times So 0.98*70=68.6 ml. Is this...

Homework Statement Ultrasound reflected from an oncoming bloodstream that is moving at 28.7 cm/s is mixed with the original frequency of 2.41 MHz to produce beats. Use the speed of sound in human tissue as 1540 m/s. Assume that the frequency of 2.41 MHz is accurate to seven significant figures...

Why is that usually, Diarrohea due to large intestine problems usually cause blood and mucus diarrohea While diarrhoea due to small intestine problems usually cause watery diarrohea. Thanks :)

Homework Statement Blood supply to the heart occurs through coronary arteries. Consider one of the arteries to be 2.5 mm in diameter and 3 cm in length. The average velocity of blood flow through that artery is 1.5 cm/s. Assuming the density of blood to be 1.056 g/cc and viscosity to be 3 cP...

So globular just means spherical, are globular proteins just red blood cells; then all red blood cells are considered globular proteins. Are all enzymes in the blood red blood cells? Are all red blood cells enzymes? What else in the blood is spherical? What is in the blood other than...

$$ F = k{R}^{4} $$ The flux F is volume of blood per unit time. This is proportional to the 4th power of the radius R of the blood vessel. All I am given is 3% increase in radius will affect blood flow how. I am to find whether is decreases or increase blood flow and by what percent. $$...

Hello! I guess this makes for a rather ...unusual first post and I'm not sure whether this is the right thread, but I'm writing a crime story that I would like to be scientifically accurate (I swear I will only use this information for fiction, haha) and was contemplating the murder weapon...

Generally pressure in a liquid changes with height at which we measure. But still blood pressure remains almost same throughout the body. How is this possible?

A Google image search of "normal blood pressure versus age" came up with charts that I don't understand completely. Consider the following information. Also see, http://www.betterhealthfacts.com/2014/02/normal-blood-pressure-for-men.html It looks like it is normal for blood pressure to rise...

If an individual has a genotype##I^oI^o## and ##hh## is he considered to be O or bombay blood group? Also i read that a person with bombay blood group can donate blood to anyone but can accept only from a person of his blood group, why can't he/she accept blood from O-ve?( is there a H antibody?)

One way to regulate blood pressure is through vasoconstriction which in turn increases peripheral resistance, but also decrease the amount of blood that passes through the vessel. These two changes have opposite effects on blood pressure. So is it because the resistance increase effect lead to a...

Since most normal body cells do need insulin to take up glucose, do type 1 diabetics instead have to run off of ketone bodies when insulin is not present? *If this is the case, wouldn't weight loss in untreated type 1 diabetics actually make their blood sugar go even higher but also be...

according to this one source, cardiac output (vascular) = blood flow (http://legacy.owensboro.kctcs.edu/gcaplan/anat2/notes/APIINotes5%20cardiac_equations.htm) However, their equations do not match: Cardiac output (CO)= Stroke volume * Heart Rate Blood Flow = cross sec area of vessel times...

My understanding and application: Flowing blood with mass m, and velocity v has KE proportional to mean velocity squared as blood flows inside the vasculature, pressure is also exerted laterally against the walls of the vessels So, it is then reasonable to use Bernoulli's for the blood and...

Some grade shool books claim that earthworm blood is red because it has hemoglobin, like ours. Now right away you need to clarify what "hemoglobin" can mean. I'll start off by saying that IMO it is incorrect to use the word for every oxygen-transporting protein. Moreover it is false to assert...

Hi there, I wondered if someone with a good knowledge of medicine/human biology could help me - this may sound like a very silly question but I don't know enough about biology to know for sure! I am 25 weeks pregnant with twins and accidentally fell asleep with a hair tie around my wrist. When I...

so i was reading on some applications of bernoulli's principle and i encountered a paragraph in which it was stated that 'the speed of the flow of blood in this region ( the region inside the artery) is raised which lower the pressure inside the artery and it may collapse due to external...

So, I just had 4 units of whole blood tranfused into me. (I am O+) Someone pointed out that I am also the likely recipient of some antibodies my donors might have.Does this mean that, if one of those donors had, like, a cold in their past, that I now have antibodies protecting me from that cold...

Is it because the bloodcells are dried out or because they are attacked by viruses?

Homework Statement When the rate of blood flow in the aorta is 5 litres per minute, the speed in the capillaries is about 0.33 mm per second. If the average diameter of a capillary is 8 microns (0.008 mm), calculate the number of capillaries in the circulatory system. Homework Equations Flow...

Homework Statement i) A human erythrocyte (red blood cell) may be approximated as a disc around 2 microns in height and with a diameter of 10 microns. If the pressure inside were to become large enough for the cell membrane to rupture, where would you expect it to fail, assuming the membrane...

I was wondering why when the blood vessels constricted the speed of the blood decreased? I thought that since the flow rate has to be the same, the volume of blood that reaches a smaller area from a bigger area will increase in speed and hence decrease in pressure? Perhaps is this due to the...

Homework Statement Hello! I don't usually ask for help on homework, but I am really stuck and my physics teacher has no clue what she is doing. She doesn't really understand the material. Here is the question: There are two carotid arteries that feed blood to the brain, one on each side of the...

Hi, I want to measure the effect of oscillating magnetic fields on oxidative stress in erythrocytes. I will use frequencies ranging from 0Hz (i.e DC) up to 1MHz the field strength will be 10uT. But I am not sure if I can do this. Wouldn't the oscillating magnetic field heat up the sample...

Greetings, It has been discovered that transfusions of young blood reverses effects of aging. Would a bone marrow transplant from a younger person produce rejuvinating blood? Or are contents of blood such as GDF11 produced elsewhere? Thanks...

A couple weeks ago I gave blood. Obviously for the week afterwards I found an difference in my fitness. I tired more easily and couldn't push as hard during fitness classes. This got me wondering how donating blood affects your fitness level. If you train after a donation would this...

I wanted to start a thread so people on this site could lower their blood pressure by releasing their Sniglets. In case you haven't heard, a sniglet is a word that should be in the dictionary (according to you) but isn't.. https://www.youtube.com/watch?v=watch?v=TixwF_ywN4A Ok, so I'll...

Hello everybody. I have seen many people asking questions on this forum about the reason to why blood pressure drops as you get farther from the heart. But honestly, not a single answer satisfied me. My major is physiology, so it's quite funny that I still don't know this "trivial" detail. What...

Saw this article posted on facebook, http://news.nationalgeographic.com/news/swapping-young-blood-for-old-reverses-aging/ and one of the papers they refer to, http://www.nature.com/nm/journal/vaop/ncurrent/full/nm.3569.html What do people think about this? I thought the affects of...

http://www.space.com/25487-total-lunar-eclipse-blood-moon-brightness.html

What are the established standards for normal and hypertensive blood pressure values? According to my doctor diastolic pressures are nowadays ignored, as they are not meaningful (surprisingly). Systolic blood pressure is regarded as an important value, but a female under 40 is allowed to have...

I'm really confused about blood transfusion, I know that O group is a universal Donner but how since it has both antibodies A,B, why doesn't agglutination happen? For an example o group is donated to an individual with A blood group why doesn't the antibody A of O group cause Agglutination in...