The biconcave cells in blood that lack nuclei when they are mature are the |
red blood cells |
Which of the following is an agranulocyte? |
monocyte |
The normal white blood cell count is between.. |
5.000-10.000 cells |
A primary function of lymphocytes is to : |
act against foreign substances |
Platelets are best defined as |
cytoplasmic fragments of cells |
Non protein nitrogenous substances include : |
amino acids, urea, uric acid. |
As a platelet plug forms, platelets release the vasocontracting substance called… |
serotonin |
The basic event in the formation of a blood clot is the change of |
fibrinogen to fibrin |
Type AB blood contains |
agglutinogen A and B |
which of the following elements is included in hemoglobin molecules? |
iron |
Which of the following usually accounts for the smallest percentage of leukocyctes in a blood sample? |
basophils |
The most active phagocytic cells among the leukocytes are |
neutrophils and monocytes |
The most important action of plasma albumins is |
helping to maintain osmotic pressures |
Of the plasma electrolytes, the most abundant are |
sodium and chloride ions |
Which of the following serves as an enzyme in the blood coagulation mechanism? |
thrombin |
The condition called cyanosis is caused by an increased blood concentration of |
carbon dioxide |
Sickle-cell anemia is caused by |
an abnormal form of hemoglobin |
Newborns are sometimes exposed to fluorescent light as a treatment for |
physiologic jaundice |
The form of anemia that is caused by a lack of dietary iron is called |
hypochromic anemia |
Pus is composed of |
all of the choices are correct |
Patients with leukimia have a tendency to bleed because they have a deficiency of |
platelets |
Erythroblastosis fetalis can be prevented by treating |
Rh – mothers with anti Rh agglutinin |
If body cells lack LDL receptors, the plasma concentration of LDL molecules |
increases and the blood cholesterol concentration increases |
Prothrombin time is a blood test used to evaluate |
extrinsic clotting factor |
Two substances that are useful for dissolving blood clots are |
urokinase and streptokinase |
The condition called thrombocytopenia is due to a deficiency of |
platelets. |
Chapter 14 Anatomy & Physiology
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