17. The Blood

The blood volume in an adult averages approximately:

a. 1 L

b. 3 L

c. 5 L

d. 7 L.

More than one choice may apply.

Which would lead to increased erythropoiesis?

a. Chronic bleeding ulcer

b. Reduction in respiratory ventilation

c. Decreased level of physical activity

d. Reduced blood flow to the kidneys

The hormonal stimulus that prompts red blood cell formation is:

a. Serotonin

b. Heparin

c. Erythropoietin

d. Thrombopoietin

The formed elements of the blood include:

(a) Plasma, fibrin, and serum

(b) Albumins, globulins, and fibrinogen

(c) WBCs, RBCs, and platelets

(d) All of these

All of the following are true of RBCs except:

a. Biconcave disc shape

b. Life span of approximately 120 days

c. Contain hemoglobin

d. Contain nuclei

Blood temperature is approximately ___, and blood pH averages ___.

(a) 36 °C, 7.0

(b) 39 °C, 7.8

(c) 38 °C, 7.4

(d) 37 °C, 7.0

Plasma contributes approximately _____ percent of the volume of whole blood, and water accounts for _____ percent of the plasma volume.

(a) 55, 92

(b) 25, 55

(c) 92, 55

(d) 35, 72

Blood proteins play an important part in:

a. Blood clotting

b. Immunity

c. Maintenance of blood volume

d. All of the above

Serum is:

(a) The same as blood plasma

(b) Plasma minus the formed elements

(c) Plasma minus the proteins

(d) Plasma minus fibrinogen

(e) Plasma minus the electrolytes

A hemoglobin molecule is composed of:

(a) Two protein chains

(b) Three protein chains

(c) Four protein chains and nothing else

(d) Four protein chains and four heme groups

(e) Four heme groups but no protein

The normal pH of the blood is about:

a. 8.4

b. 7.8

c. 7.4

d. 4.7

What five major functions are performed by blood?

List the three major categories of formed elements

Which is least numerous?

Which comprise(s) the buffy coat in a hematocrit tube?