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About This Quiz
A vampire is headed straight for you. "I vant to drink your blood," he hisses. To prevent him from sucking the life force straight out of you, you decide to distract him with your amazing knowledge of blood. Take the quiz and prove yourself.
How many liters of blood does the adult human body contain?
The adult human body contains approximately 5 liters, or 5.3 quarts, of blood. That makes up 7 to 8 percent of a person's body weight.
The percentage of blood made up of red blood cells is a frequently measured number known as the hematocrit. The ratio of cells in normal blood is 600 red blood cells for each white blood cell and 40 platelets.
a hormone that stimulates production of red blood cells
What does it mean when there's an increase of white blood cells in the body?
There's an infection somewhere in the body.
When the number of white blood cells in a person's blood increases, this is a sign of an infection somewhere in the body. In a normal adult body there are 4,000 to 10,000 white blood cells per microliter of blood.
There are six main types of white blood cells in the blood. Which type is the most common?
Neutrophils, which kill bacteria by ingesting them, make up 58 percent of a person's white blood cell count. The other five main types of white blood cells are eosinophils, basophils, bands, monocytes and lymphocytes.
If you are a universal donor, what blood type do you have?
People with type O blood are universal donors, because anyone can get a type O blood transfusion. Type O blood has no antigen on the surface that could react with antibodies in the recipient's plasma, which causes a transfusion reaction. Someone with type AB blood is a universal recipient because this blood has no antibodies that could react with donated blood.