Exam 12: The Cardiovascular System: Blood

A white blood cell count below normal is called _____.

What percentage of a centrifuged sample of whole blood is occupied by plasma?

The life span of a red blood cell is approximately:

During fetal development, blood cells may arise from tissue in the thymus, spleen, liver, and red bone marrow.

The white blood cells that are the first to respond to tissue destruction caused by bacteria are the _____.

_____ attack viruses, fungi, transplanted cells, cancer cells, and some bacteria.

Which of these terms do not below with the others?

Your patient has chronically low B lymphocyte and T lymphocyte levels but sufficient erythrocyte and platelet levels. Which cell is most likely developing incorrectly?

T cells respond to foreign invaders by producing antibodies.

The temperature of blood is slightly less than normal body temperature.

Pernicious anemia and megaloblastic anemia are two conditions that result from inadequate absorption of

_____ stem cells give rise to all formed elements of blood.

The ABO blood grouping system is based on two antigens: AB and Rh.

A hematocrit of 54% or higher (upper limit of normal) is an indication of polycythemia.

Describe the three main functions of blood.

Most erythropoietin of the newborn is produced in the liver.

Blood functions to: 1 protect against its excessive loss after injury 2 play a role in pH regulation 3 protect against UV radiation damage 4 protect against disease 5 assist with regulation of body temperature

If the total volume of blood in a test tube was 10 mL and the volume of red blood cells was 3 mL, the hematocrit value is 3%.

Stem cells, lymphocytes and progenitor cells are similar in appearance and cannot be distinguished from one another microscopically.

Describe the three chemicals that neutrophils contain and how these chemicals assist in defense against infection.