Blood Definition and 324 Threads

Homework Statement An artery has an inside diameter of 3.20 mm and passes through a region where the magnetic field is 0.065 T. If the voltage difference between the electrodes is 155 µV, what is the speed of the blood? Homework Equations V=kq/r E=kq/r^2 v=E/B The Attempt at a...

I just got my blood test back and the numbers have some units I don't recognize, such as E9 and E12. The printer seems to not be able to handle very sophisticated formatting, for example: - one unit is listed as "UMOL/L" for Creatinine. I suspect that this is meant to be \mumols. -...

need some help please :) Had major paper due today, didn't have much time for my physics hw, and now I am stumped on some. Anyone got ideas, I have to turn it in tommorow! Thanks for any help you can give! 1. A microscope has an objective lens with a focal length of 16.22mm and an eyepiece...

My question is about West Nile Virus and why/how it is much more likely to cause encephalitis in the elderly. What I've found is that increased permeability of the BBB is what allows the virus to infect brain tissue which is how the majority of neurological damage is done. The rest of the...

If the average volume flow of blood through the aorta is 9 × 10-5 m^3/s and the cross-sectional area of the aorta is 3.1 × 10-4 m^2, what is the average speed of blood in the aorta in cm/s? Looking through my lecture notes I do not see any equations relating volume of a...

Good evening everyone, I wonder why our blood will accumulate in legs if we don't walk or jog after a running competition. [HKALE2006] ----------------------------- Is it because if we don't walk or jog , the skeletal muscle will not keep contracting and the venous blood will not return...

What would happen if you didnt tie that rubber while the needle is in your arm gathering blood. Would it spray a lot faster or not at all?

This may sound stupid but this is what happened. I had a cup and i put it to my mouth, i then sucked the air out so it stuck to my mouth. I guess i did it a little to much cause now my mouth is all red and it has little red dots everywhere where the cup was. It has been a day and it hasnt gone...

If I haven't eaten for a while (~14 hours) I start to feel hot and sweat, my hands shake a little bit, am more irritable, and generally feel bad. Do I have blood sugar problems? Is this normal?

Blood can carry excess energy from the interior to the surface of the body, where the energy is dispersed in a number of ways. While a person is exercising, 0.8 kg of blood flows to the surface of the body and releases 2050 J of energy. The blood arriving at the surface has the temperature of...

Well I am wondering. I know all the basics of blood types. How you can be AA-AO OO, AB, BB-BO and I've done the thing to find out which one I am. and I am AA or AO But I've heard of A+ or A- so what's with the + or - whats the difference. and how is it determined if your + or -

i was hoping for someone to help me get started with this problem == A blood vessel is cylindrical with radius R. and length l. the blood near the boundary moves slowly; blood at the cetner moves the fastest. The velocity, v, of the blood at a distance r from the center of the artery is given by...

Bernoulli's hydrodynamic pressure equations show that when a fluid flows from a large bore to a smaller bore the velocity of the fluid increases and the pressure decreases so why is it that when people suffer from arterio sclerosis (a hardening and narrowing of the arteries) they suffer from...

Hi there. Has anyone got ideas as to why blood flow to an organ is not really affected by vasodilation? Thanks.

What wouldit mean if your blood is dark?

Someone first of all someone help me decipher this question. A small amount of solution containing Na24 radio-nuclide with activity A0 = 2 x 103 disintegrations per second was injected in the bloodstream of a man. The activity of 1.0cc of blood sample, taken 5 hours later, turned out to be A...

Aqueous solutions introduced into the bloodstream by injection must have the same osmotic pressure as blood; that is, they must be "isotonic" with blood. At 25C, the average osmotic pressure of blood is 7.7 atm. What is the molarity of an isotonic saline solution (NaCl in H2O)? Recall that...

We are learning the excretory system, and are given a thinking assignment. Okay so we are given a bunch of values for concentration of the substances in the kidney. Basically the post-glomular blood (blood after being filtered by glomerulus) has a little more protien concentration than the...

If I recently had a blood vessel pop in my thumb what should I do? Am I at risk for popping anywhere else?

I know that rate of flow is equal to pi*(P1-P2)*R^4/8nL. For blood in the coronary artery, I know the pressure drop, and the radius of the artery. What is the viscosity of blood? I can't find this value anywhere! And what value should I enter for L (distance L along a tube)? Is there an...

Ehm, if not actually the blood, the crocodile's remarkable ability to fight bacterial infections might be a new source for powerful antibiotics, according to this article: http://news.bbc.co.uk/1/hi/health/4155522.stm

Hi, i don't know how to do this question - some help would be appreciated. Q: A patient is to be given a blood transfusion. The blood is to flow through a tube from a raised flexible bag to a needle inserted in the vein. The inside diameter of the 40mm-long needle is 0.40mm and the required...

The artery in Figure 22-11 has an inside diameter of 2.30 mm and passes through a region where the magnetic field is 0.065 T. (a) If the voltage difference between the electrodes is 175 µV, what is the speed of the blood? m/s quite honestly, i do not know how to go about this one...

that ebn alnafees (who is an arabian scientist) was the first to discover the blood circulation

not sure where to begin... The blood speed in a normal segment of a horizontal artery is 0.13 m/s. An abnormal segment of the artery is narrowed down by an arteriosclerotic plaque to one-fifth the normal cross-sectional area. What is the difference in blood pressures between the normal and...

If we give someone with blood group A a transfusion using an O doner we say they are safe, since the O blood cells will not possesses antigens to stimulate an immune response in the recipient. But surely the O doner blood with contain anti-A antibodies and memory cells that will be stimulated...

I'm going to turn 17 soon, the legal age at which one can donate blood in my state, and I plan on donating blood soon thereafter. Being that I've never done it before, and I'm not tremendously active (thus don't have a particularly strong heart, thus figure that losing a relatively small amount...

ok moon bar i will answer them but just check if they r right :smile: 1. explain why blood pressure and heart rate differ when measuered in a reclining position and in a standing position. The reclining blood pressure and heart rate will be lower because the entire body is even with the...

Ultrasound reflected from an oncoming bloodstream that is moving at a 30 cm/s is mixed with the original frequency of 2.5 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.) Beat Frequency in Hz =

Figured this forum might be able to help more than the homework help, if not, feel free to redirect. I'm writing a program that calculates Blood Alcohol Content from various input the user gives (nothing fancy, straight forward simple calculation, prompting user for data, that sort of thing)...

Can someone help me answer these questions?!? thanx!@ :confused: Explain why blood pressure and heart rate differ when measured in a reclining position and in a standing position. Explain why high blood pressure is a health concern. High blood pressure can lead to many other...

the volume of blood in the bodyof a diver is about 6 L. Blood cells make up about 55% of the blood volume, and the remaining 45% is the aqueous solution called plasma. What is the maximum volume of nitrogen measured at 1.00 atm and 37C that could dissolve in the diver's blood plasma when the...

A few questions I need answered before a test. Why does a standing blood pressure and heart rate differ from a reclining blood pressure and heart rate? Why must an athlete exercise harder and longer to achieve a maximum heart rate and blood pressure as compared to an average person...

Yesterday I filled my tank and it cost $40. I walked back into the office grumpy about this only to find one of my co-workers had emailed these to me: http://img236.exs.cx/img236/8493/pic002485kp.th.jpg http://img236.exs.cx/img236/1736/pic006114xo.th.jpg...

okay having trouble setting up the formula for this one! So if someone could just tell me what formula to use that would be awesome. What minimum blood pressure in mmHg at the heart is required to produce an artial blood pressure of 59 mmHg in the brain if the brain is 34 cm above the heart...

can aids virus survive in cow's blood?

the New York Times account http://www.nytimes.com/2005/03/24/science/24cnd-dino.html?ex=1112331600&en=5a88279207414f4b&ei=5065&partner=MYWAY the Reuters account http://www.reuters.com/newsArticle.jhtml?type=topNews&storyID=7999945

Vampyred! I have a question...how long does it usually take a lab to do blood work on you? :confused:

Hello, So recently my teacher assigned a blood splatter lab. The lab consisted of using fake blood and changing an aspect of how blood would collide with surface e.g. angle, height, etc. Then we were suppose to observe the change in result e.g. volume, area, etc. I did height and the area of...

If red blood cells don't have nuclei, then does this mean we can't find DNA in blood? Thanks

Can anyone correct me if I am wrong? This is basic basic basic basic basic basic biology, and i am just trying to refresh my memory and make sure that i am stating the correct facts 1) General concepts about tonicity ---- Lets say for example, we have a red blood cell exposed to solutions...

The Phenophthalien(i know i can't speel) test: This one show they have a dead body, from the desert. They test a bathtub as they think the murder and blood was there. They use the pheno-blood test often. But if its in the bathtub. As pheno is just a ph indicator. Couldn't a base...

Lee Smolin's advisor was Sydney Coleman, whose advisor was Murray Gell-Mann, whose advisor was Victor Friedrich Weisskopf, whose advisor was Max Born, whose advisor was Carl Runge, whose advisors were two, Karl Weierstrass (waw Gudermann, waw Gauss) & Ernst Kummer, whose advisor was...

(a) An arteriole has a diameter of 0.029 mm and carries blood at the rate of 6.2 10-6 cm^3/s. What is the speed of the blood in the arteriole? (b) Suppose the arteriole branches into 340 capillaries, each with a diameter of 4.0 10-6 m. What is the blood speed in the capillaries? (The low...

Haemolytic disease and the rheasus blood group... Why do you get haemolytic disease in a baby ( not first baby) if the mother is Rh- and her anti D antibodies cross the placenta, yet it is fine to tranfuse Rh- blood to a Rh+ recipient, which will also contain anti D antibodies? Thanks in...

Blood groups and transfusions... I have learned that when you transfuse the wrong blood to a recipient whose antibodies work against the donated blood that agglutination occurs. eg - if you transfuse A blood to a B person, since the B person will possesses anti-A antibodies which will cause...

please help asap! :bugeye: I am not great at physics and am in an intro class for health sciences...here is my problem. A person with a blood pressure of 160/100 takes a drug that causes a 6% increase in the radius of the arterioles. Find the new blood pressure assuming no change in heart...

Hi guys, Could anyone give me a hand with this one? During exercise, 2-hydroxypropanoic acid (lactic acid) is produced in the muscles. Deduce whether the ionised or non-ionised form of this weak acid (Ka=1.4*10^-4) is mainly present at the pH of the human body (pH=7.4).

I thought this was an interesting article, in light of the Bush's accusations against Kerry... From a major Seattle newspaper: http://seattlepi.nwsource.com/connelly/192828_joel29.html edit: oops. Bold doesn't work in the thread name, does it? :biggrin: :rolleyes:

Blood supplies are critically low. Consider donating for the first or the nth time - go with a buddy. Be brave and protect our citizenry. Call the Red Cross at 1-800-GIVE-LIFE to make an appointment soon nearby. Your workplace may allow you time off. I believe that my 6+ gallons donated...