cardiovascular system LECTURE
Normal blood pH falls in a range between ________ and ________.
7.35; 7.45
Which type of leukocyte kills parasitic worms by deluging them with digestive enzymes?
Eosinophil
What does fibrin contribute to the process of coagulation?
Fibrin forms a meshwork that traps RBCs and forms the basis of the clot.
Which organ is largely responsible for the synthesis of clotting factors?
Liver
White blood cells containing granules and lobed nuclei are classified as ________.
Neutrophils
Which blood type lacks antigens for the ABO blood group yet carries anti-A and anti-B antibodies?
O
Which wave on the electrocardiogram (ECG) results from the firing of the sinoatrial (SA) node?
P
Which of the following blood disorders is more likely to occur as we age?
Pernicious anemia
Which of the following red blood cell disorders may provide a better chance of surviving where malaria is present?
Sickle cell anemia (SCA)
Which one of the following represents the correct path for the transmission of an impulse in the intrinsic conduction system of the heart?
Sinoatrial (SA) node, atrioventricular (AV) node, atrioventricular (AV) bundle (bundle of His), right and left bundle branches, Purkinje fibers
Which of these steps of hemostasis results in the creation of long, hairlike molecules of insoluble fibrin?
The reaction between thrombin and fibrinogen
Which of the following characterizes leukopenia?
abnormally low number of leukocytes
When antibodies bind to antigens on foreign blood types, clumping or ________ occurs.
agglutination
An important plasma protein that contributes to the osmotic pressure of blood is ________.
albumin
Hemolysis most likely will occur when ________.
an Rh-negative person receives the second transfusion of blood that is Rh positive
The condition in which maternal antibodies cross the placenta and destroy the baby's RBCs is called ________.
hemolytic disease of the newborn
The condition in which fetal RBCs are destroyed faster than the infant liver can rid the body of the breakdown products of hemoglobin is called ________.
physiologic jaundice
You notice a missing P wave on a patient's electrocardiogram (ECG) and believe there is a problem with the ________.
sinoatrial (SA) node
A hematocrit is a measure of ________.
the percentage of blood that is comprised of red blood cells
The vessel that carries oxygen-rich and nutrient-rich blood to the fetus is the ________.
umbilical vein
Placing pressure on a cut will constrict blood vessels manually, and encourages ________.
vascular spasms
Bleeding disorders can result from the lack of ________.
vitamin K
Hereditary bleeding disorders that result from lack of clotting factors are referred to as ________.
hemophilia
The friction blood encounters as it flows through the vessels is called ________.
peripheral resistance
The layer of the heart wall that receives the stimulus from letter E is called the ________.
The layer of the heart wall that receives the stimulus from letter E is called the ________.
A person with type B blood can receive blood from blood type(s) ________.
B, O
Which of the following does not correctly characterize blood?
Blood is cooler than body temperature.
Molly has blood type A and her daughter has blood type B. Why can't Molly donate blood to her daughter?
Blood type B contains anti-A antibodies, which will agglutinate type A blood.
Which group of white blood cells includes the neutrophils, eosinophils, and basophils?
Granulocytes
What component of a red blood cell binds and transports oxygen?
Hemoglobin
Which of the following is a blood clotting disorder?
Hemophilia
Which one of the following represents the proper sequence of hemostasis?
Vascular spasm, platelet plug formation, coagulation
What is the physiological cause of a heart attack?
a blood clot lodging in a blood vessel supplying the heart
While cross matching an unknown blood type, agglutination was observed with anti-A serum only. This blood type is ________.
blood type A
Erythrocytes are synthesized in the ________ under the control of ________.
bone marrow : erythropoietin
In a centrifuged blood sample, the buffy coat situated between the formed elements and the plasma contains ________.
leukocytes and platelets
Which of the following is not a descendent of the myeloid stem cell line?
Lymphocyte
The first heart sound, "lub," is caused by the closure of the ________ valves.
atrioventricular (AV)
