18.1 An Overview of Blood

Blood is slightly more viscous than water.

Which of the following statements about blood is true?

The patient's blood is approximately 58 percent plasma (since the buffy coat is less than 1 percent).

A patient's hematocrit is 42 percent. Approximately what percentage of the patient's blood is plasma?

False. The buffy coat is the portion of blood that is made up of its leukocytes and platelets.

True or false: The buffy coat is the portion of a blood sample that is made up of its proteins.

There are values given for percent saturation, tension, and blood gas, and there are listings for different types of hemoglobin.

Visit this site for a list of normal levels established for many of the substances found in a sample of blood. Serum, one of the specimen types included, refers to a sample of plasma after clotting factors have been removed. What types of measurements are given for levels of glucose in the blood?

immunoglobulin.

Which of the following plasma proteins is not produced by the liver?

It is the most abundant plasma protein.

Which of the following statements about albumin is true?

The formed elements include erythrocytes and leukocytes, which are cells (although mature erythrocytes do not have a nucleus); however, the formed elements also include platelets, which are not true cells but cell fragments.

Why would it be incorrect to refer to the formed elements as cells?