Phlebotomy refers to a collection of venous blood. This operation can be practiced on all the superficial veins of the body, on those of the foot, the leg, the neck, the whole upper limb. It must be done in an area where there is a protruding vein and the least sensitive to limit pain to the patient. It should not be done in an altered, injured or infected area (like bruise)
The blood is collected on tubes with or without anticoagulant according to the analyzes that one wants to practice.
The reason for choosing the sampling site is for the most part practical, the veins are easily identifiable, and easily accessible for paramedical personnel. Their collection is less dangerous than that of arteries, which are generally thinner and close to the peripheral nerves.
Answer:
If 32 packed volume units of cells are separated from 46 volume units of plasma from a blood sample, the hematocrit is <u>41,02%</u> percent. The hematocrit value is <u>within the normal</u> range.
Explanation:
Hello!
Hematocrit (or packed cell volume -PCV-)is defined as the percentage of red blood cells (vol%) in a blood sample. One common method of determining it is by centrifuging a heparinized blood sample in a capillary tube at 10 000 RPM for five minutes. This separates the blood sample in two layers, formed elements (RBC and WBC) and Plasma.
The length of the layers is directly measured from the tube and represents the volume of packed cells and plasma. Since the number of white cells is negligible compared to the number of red cells, the formed elements are considered to represent the red blood cells.
The hematocrit can be calculated as the volume of packed cells divided by the total volume of the blood sample.
<u>In the question:</u>
= 
= 41,02%
In humans the normal hematocrit range is 40,7% to 50,3% for men and 36,1% to 44,3%. Taking these reference values into consideration, this sample is within the normal range.
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Answer:
Which quotations from "The Crab That Played with the Sea" convey a comic tone? Select two options.
"O my Best Beloved"
"He took the Elephant—All-the-Elephant-there-was—and said, 'Play at being an Elephant.'"
"All-the-Cow-there-was . . . licked her tongue round a whole forest at a time."
"The great Sea . . . overflowed all the dark forests for miles and miles, and flooded the Man’s house."
"By and by the Eldest Magician met the Man on the banks of the Perak river."
Explanation:
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Answer:
B. The amount of lee that melted.
Explanation:
The dependent variable is more of what results from an action during an experiment. It is actually what is being tested for. In the experiment, the scientist seeks to understand the effect of salts on melting point of ice. He selects the different salts which can cause a ice to melt (independent variables) then he sets up to find out the effect of the salt on the ice.
He cannot control how much ice will melt. The properties of the salts would determine the extent and rate of the dissolution of the ice pack. This is the dependent variable which relies on the nature of the salt.
