Cardiovascular System Test 2025

Which of the following is the function of the cardiovascular system?

• regulating body temperature and fluid volume

• preventing infection

• transporting hormones and wastes

• all of these are functions of the cardiovascular system

All of the following are formed elements of the blood except:

• plasma

• erythrocytes

• thrombocytes

• leukocytes

Which of the following components of blood makes up the smallest percentage by volume?

• plasma

• erythrocytes

• leukocytes & thrombocytes

An erythrocyte is more commonly known as

• a. a white blood cell

• b. a red blood cell

• c. a platelet

• d. hemoglobin

Blood plasma is mostly made of

• water

• granules

• oxygen

• hemoglobin

The cell in the picture is responsible for releasing histamines, which dilate blood vessels during an allergic attack. It is categorized as a(n) _______________ and is called a(n) _____________.

• granulocyte, lymphocyte

• agranulocyte, monocyte

• granulocyte, basophil

• agranulocyte, eosinophil

A single hemoglobin molecule can carry _____ oxygen molecules and each red blood cell can carry _____ hemoglobin proteins.

• 4, millions of

• 4, 100

• millions of, 4

• millions of, 100

Because oxygen is nonpolar,

• It must be absorbed by the lymphocytes.

• It must diffuse directly into the blood.

• It must be eliminated quickly.

• It must be carried by hemoglobin.

The process of hemostasis is completed by which type of cells?

• white blood cells

• red blood cells

• platelets

• plasmas

Which of the following is NOT true of hematopoiesis?

• It occurs in the red bone marrow of adults.

• It begins with a monocyte.

• It is stimulated by epinephrine.

• It causes the differentiation of all types of blood cells.