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Laboratory Testing

Before a doctor can diagnose a patient, laboratory tests such as blood work are required.

8,512 Questions

Structure of RNA?

RNA is a single-stranded molecule composed of a ribose sugar, a phosphate group, and one of four nitrogenous bases (adenine, guanine, cytosine, or uracil). It plays a key role in gene expression by carrying genetic information from DNA to make proteins through the process of transcription. RNA can exist in various forms such as messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA).

What do endospores do?

Endospores are dormant, tough, and non-reproductive structures formed by some bacteria to withstand harsh environmental conditions. They allow the bacteria to survive unfavorable conditions like high temperatures, desiccation, and exposure to chemicals or radiation. Endospores can germinate back into active bacterial cells when conditions become suitable again.

What is the difference between male and female blood volumes?

On average, males have a higher blood volume than females. This is because males typically have larger body sizes and muscle mass, which require more blood for oxygen transport and nutrient delivery. Additionally, hormonal differences can also affect blood volume in males and females.

Can someone alter the stats of a DNA test with out working there or alter it before having it done?

It is highly unlikely that someone can alter the results of a DNA test without working at the testing facility or having access to the sample prior to testing. DNA tests are conducted under controlled conditions to ensure accuracy and prevent tampering. Any unauthorized alteration would require inside knowledge or physical access to the testing process, which is typically tightly regulated to maintain integrity.

How many white blood cells can fit on the head of a pin?

approximately 40,000 white blood cells can and will fit on the eye of a pin

What does a high wbc of 15.4 mean?

A white blood cell (WBC) count of 15.4 indicates an elevated number of white blood cells in the body, which can suggest an infection, inflammation, or a possible immune system response. It is important to consult a healthcare provider for further evaluation and diagnosis to determine the underlying cause.

What happens in an autopsy?

During an autopsy, a forensic pathologist examines a deceased person's body to determine the cause of death. This involves analyzing the internal organs, tissues, and body fluids, as well as taking samples for toxicology analysis. The findings from the autopsy can provide valuable information for legal investigations, medical research, and closure for the deceased person's family.

What happens to a cell when your body is dehydrated?

When your body is dehydrated, cells lose water and essential nutrients necessary for proper functioning. This can lead to decreased cell volume, impaired cellular communication, and reduced energy production. In severe cases, dehydration can cause cells to become damaged and may lead to organ dysfunction.

Are most Americans Rh positive or negative?

Most Americans are Rh positive, with around 85% of the population having this blood type. Rh negative blood type is less common in the United States, with around 15% of Americans possessing it.

What type of food can a person eat with A- blood type?

People with A- blood type are often recommended to eat a diet rich in fruits, vegetables, plant-based proteins, and whole grains. They may benefit from avoiding dairy, red meat, and high-fat foods. It's best to consult a healthcare provider or dietitian for personalized recommendations.

What color tube for a bmp?

A Basic Metabolic Panel (BMP) typically requires a serum separator tube (SST) or a gel-barrier tube. These tubes are commonly gold or red-striped tops. The gold or red-striped top tube is used to collect a blood sample for various tests, including those in a BMP, which measures basic metabolic markers like glucose, electrolytes, and kidney function.

Can parents with B positive and O positive have a child with A positive blood type?

A B positive child will have B antigen (agglutinogen) in his blood. Since O+ve blood has neither A nor B antigen and A +ve blood does NOT have B antigen, the baby will naturally have no B antigen in his blood. It may be either A or O ; but not B or AB.

How long does it take to get results from a urine culture?

Preliminary results are usually available in 24-48 hours, but the final results are allowed to grow for 72 hours, and only after that time is a culture result considered final.

What is blood smear?

A blood smear is a sample of blood that is spread thinly on a glass slide, stained, and examined under a microscope. It is used to evaluate the number, morphology, and size of different types of blood cells such as red blood cells, white blood cells, and platelets. This test helps in diagnosing various blood disorders and infections.

What is c antigen?

"C antigen is an antigen in the Rhesus blood grouping system. This blood group system is associated with over 40 antigens which may or may not be present in a someone's blood, determining her or his place in this system. The most famous Rhesus antigen is the D antigen, sometimes called the Rhesus factor, which can cause complications in pregnancy. Blood analysis for C antigen can be performed in a lab which has the serotyping tools necessary to identify the presence of this antigen in the blood. As with some other antigens associated with blood types, the C antigen can create a blood incompatibility which may cause problems during pregnancy or with blood transfusions. If someone does not have this antigen and she or he is exposed to the blood of someone who does, C antibodieswill develop. With the next exposure, a coagulation reaction will occur in the blood. For this reason, it is important to avoid transfusing C positive blood into people who do not have the antigen.Whereas most blood types are determined by red cell antigens that differ by one or two amino acids, the Rh blood group contains the D antigen which differs from th"e C/c and E/e antigens by 35 amino acids. This large difference in amino acids is the reason why the Rh antigens are potent at stimulating an immune response

What happens if a person with O negative blood receives platelets from an O positive person?

The person with the O negative blood has an anti-RH antibody in their blood which will make the O positive platelets received coagulate (neutralizing it since the body sees the antigen RH as a foreign substance) which can cause severe problems depending on how much O positive blood is received.

How many milliliters makes 1 centimeters?

There is no direct conversion between milliliters and centimeters as they are measuring different things (volume and length, respectively). The relationship between them would depend on the dimensions of the object being measured.

What would be a child's blood type if the mother is a plus and the father is o plus?

Since the mother has an "O" blood type (which is recessive), she can only pass down "O" blood type alleles. This means both children must have at least one "O" allele (whether they express it depends on the allele they inherit from their father). Since the mother is RH positive, she has to have at least one positive allele. It is possible she carries a recessive RH negative allele. (An allele makes up half of your genes: one from dad, one from mom.)

This being said, we can now determine what alleles the children got from the mother and, by process of elimination, what was inherited by the father. The O negative child would have two O alleles, which means the parents must each have had an O allele. The negative allele again is recessive, so for the child to express this, he/she must have gotten a negative allele from both parents. This confirms that the mother has a recessive negative allele, although her blood type is O positive.

Now the B positive child gives us more limitations on what the father could be. The mother would have passed down an O allele to this second child, meaning that the B allele must have come from the father. The positive allele could have come from either the father or the mother (since the mother has a positive and negative allele), so it is undetermined what RH alleles the father completely has.

Since the father must have an O allele to pass down to the first child, a negative allele to pass down to the first child, and a B allele to pass down to the second child, it leaves us with only two possibilities of the father's blood-type:

B positive or B negative.

Hopefully this helps, but do remember that blood type is not completely a reliable way to eliminate a father. Any mutations in the child's genes may have caused him to express an allele that was not from the father, thus a paternity test would still be needed to know for sure. But from what we learn in High School Biology, "B+" and "B-" would be the correct answers in this case and probably follow 90% of the time (I am estimating here.)

Why you can give patients with group A blood with group O?

Group A blood types have A antibodies attached to their blood cells.

Group B blood types have B antibodies attached to their blood cells.

If you give a group A blood type a transfusion with type B blood, their body will attack the type B blood cells after sensing foreign antibodies.

Since Group O does not have any antibodies attached to the blood cells, you can give it to type A. Type A will not detect foreign antibodies since group O has no antibodies, and therefore, the body will accept the type O blood.

All Medical Answers need confirmation and re-confirmation.

What epithelial cells non renal mean in the urine?

Epithelial cells are the cells your body uses to line tubes, among other things, and the term renal refers to the kidney.

So they are saying that in the urine they found some cells that normally line tubes, but they could tell they weren't from the kidney. This could mean they came from the bladder, the ureters, urethra, or even someplace else.

What is a haemogram-esr?

A haemogram-ESR, or erythrocyte sedimentation rate, is a blood test that measures the rate at which red blood cells settle in a tube over a specific period of time. It is a non-specific indicator of inflammation in the body and can help in diagnosing conditions such as infections, autoimmune diseases, and certain cancers. The results are typically reported in millimeters per hour (mm/hr).

What is lymph in hematology test?

In a basic CBC from the lab there is a test for Lymph, Mono, Eos, and Baso. These are all distinct categories of viral or bacterial infection fighters. Lymph is short for lymphocytes with are responsible for the activities of the immune system. If lymph is high that means there is bacterial, viral or another type of infection invading the body.

What is a clinical trial?

A clinical trial is one of the final stages of a long and careful cancer research process. Studies are done with cancer patients to find out whether promising approaches to cancer prevention, diagnosis, and treatment are safe and effective.

Why type o is considered as universal donor?

All of our cells have protein "identifier" tags (proteins) on them that assist the function of the immune system. We start off with an immune system that can recognise almost every type of protein that can be made.

This is attenuated while we are developing in the womb because we do not want our immune systems to recognise and begin attacking self. So any immune cells that do recognise us while we are developing are destroyed. When we are born we have an immune system that can recognise pretty much everything but self.

There are 4 main blood groupings (but actually many more) - A, B, AB, and O. Blood cells of the A type have a the A protein on them. B's have B protein, AB have both, and O have neither.

So if you are have blood type A, your immune system will not recognise your blood cells, but will mount an attack on blood type B, or AB because they have the foreign, never encountered B protein on them (and vice versa).

O type blood does not elicit an immune response in anyone because the body's immune system does not recognise it as being foreign because it does not have foreign proteins on it, thus it is Universally accepted. People who are AB type are lucky as they can take anyones blood - their immune system will not respond to A proteins or B proteins and O +ve is called universal donor ,AB is called universal recepeint

What is the best fruit for Blood Type O plus?

There is no scientific evidence to support specific fruits being better for a certain blood type. The key is to consume a variety of fruits to ensure a well-rounded nutrient intake that aligns with general healthy eating guidelines.