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When testing for occult blood using hemoccult the presence of blood is indicated by adiscolortion around the perimeteer of a smear?
After the hem-occult card is prepared, and the reagent is dropped on to the specimen, if blood is present there will be a color change resembling that of the positive control. The color change isn't necessarily limited to the perimeter of the drop.
If Colour of stool is brownish and occult blood is trace?
Presence of occult fecal blood in stool is often used as an indicator of peptic ulcers or colorectal cancer, depending on what other signs/symptoms are present. It's important to note that a POSITIVE test for occult blood does NOT automatically mean cancer. It is simply a sign that needs further investigation, usually by an colonoscopy, sigmoidoscopy or endoscopy to establish the root cause.
Why blood color red?
Blood appears red because that's the colour that they do not absorb, same with all other objects. This depends on the ions and electrons in blood.
When you step on a cockroach or smash a fly the blood appears colorless because?
Insects and invertebrates like them do not have any red blood cells in their blood. That is why it does not have a red color.
I always forget if an Allen's test should be positive or negative if the blood returns to the hand via the ulnar artery?
The test is POSITIVE if color ( blood flow ) returns to the hand within 15 seconds, if not another site should be chosen. The test is POSITIVE if color ( blood flow ) returns to the hand within 15 seconds, if not another site should be chosen.
Is p areuginosa gram positive?
Pseudomonas aeruginosa is a gram negative organism.It appears pink when stained by GRAMS technique.i.e., it takes the counter stain SAFFRANIN and appears pink in color.
What color is hippos dung?
The Hippo's body is brownish gray with pink spots on the top rbertuca
Why do we have red blood?
Red blood gets its color from hemoglobin, a protein inside red blood cells that binds with oxygen. Hemoglobin gives blood its red color when oxygenated and appears more blue when deoxygenated. This color change is key for transporting oxygen from the lungs to the rest of the body and removing carbon dioxide.
Are pigs white?
some of them are. The pigs that are most common seen as pink are actually white. The pink color you see is their blood showing through their skin due to the sun exposure. Chester White swine are the most common breeds that are white, but appear pink.
What is a color change?
where one color is that then appears as a different color
What is the color of the veins that are closer the surface of the body?
The blood in the veins is red, but appears to be blue, especially in older people, when seen through the skin.
Why would a liver have a bluish color to it?
The blood that passes through the liver is deoxygenated blood (there is no oyygen in the blood when it passes through the liver as it has been used up by other cells, tissues and organs), therefore the liver appears blue.
