Let it flow
Plasma makes up _______ of the total blood volume.
A. 30%
B. 90%
C. 75%
D. 55%
D. 55%
The right side of the heart pumps blood through vessels to the lungs and back to the left side of the heart through the __________ circulation.
A. pulmonary
B. fetal
C. coronary
D. systemic
A. pulmonary
A blood pressure reading of 120/80 would
A. indicate a diastolic pressure of 120 mm Hg.
B. have Korotkoff sounds at pressures above 120 mm Hg.
C. indicate a systolic pressure of 120 mm Hg.
D. indicate a systolic pressure of 80 mm Hg.
C. indicate a systolic pressure of 120 mm Hg.
Systemic blood vessels transport blood
A. from the left ventricle through the body to the left atrium.
B. from the left ventricle through the body to the right atrium.
C. from the right ventricle through the body to the left atrium.
D. from the right ventricle through the body to the right atrium.
E. from the left ventricle to the lungs.
B. from the left ventricle through the body to the right atrium.
The buffy coat of a centrifuged blood sample is composed of __________.
A. platelets and leukocytes
B. leukocytes only
C. platelets only
D. erythrocytes only
E. erythrocytes and leukocytes
A. platelets and leukocytes
The wall of the __________ is much thicker than any other chamber in the heart, which allows for stronger contractions to pump blood through the systemic circulation.
A. right atrium
B. left atrium
C. right ventricle
D. left ventricle
D. left ventricle
In which type of blood vessels is the blood pressure the lowest?
A. Capillaries
B. Arteries
C. Venae cavae
D. Veins
E. Arterioles
C. Venae cavae
Which statement about arteries and veins is CORRECT?
A. For an artery and vein of the same diameter, the vein would have a thicker wall.
B. Veins contain valves and arteries do not.
C. Blood pressure is lower in arteries than in veins.
D. When empty, an artery is more likely to be collapsed (flattened) than a vein.
E. Both arteries and veins are under pressure.
B. Veins contain valves and arteries do not.
Which blood component is not correctly matched with its function?
A. Erythrocytes – transport oxygen
B. Leukocytes – protect against disease
C. Platelets – phagocytize bacteria
D. Plasma proteins – maintain blood osmotic pressure; involved in clotting
E. Monocytes – become macrophages
C. Platelets – phagocytize bacteria
The difference between the maximum and resting cardiac output is called
A. cardiac reserve.
B. preload.
C. stroke volume.
D. afterload.
E. contractility.
A. cardiac reserve.
Which of the following would increase resistance to blood flow?
A. A decrease in the length of the vessel
B. A decrease in the number of red blood cells
C. A decrease in blood viscosity
D. A decrease in the radius of the vessel
E. A decreased hematocrit
D. A decrease in the radius of the vessel
What is the order of the blood vessels that a red blood cell would pass through as the blood leaves the heart, travels to a tissue, and then returns to the heart?
A. Arteriole, artery, capillary, vein, venule
B. Capillary, arteriole, artery, vein, venule
C. Artery, arteriole, capillary, venule, vein
D. Vein, capillary, artery, arteriole, venule
E. Artery, venule, capillary, arteriole, vein
C. Artery, arteriole, capillary, venule, vein
During platelet plug formation,
A. platelets stick to the exposed collagen fibers of injured vessels.
B. activated platelets release fibrinogen.
C. thrombin is released from endothelial cells.
D. vitamin K production increases.
E. platelets multiply.
A. platelets stick to the exposed collagen fibers of injured vessels.
A knowledge of heart location would not be important for which of the following?
A. Stethoscope positioning
B. Blood pressure readings
C. Electrocardiogram
D. Cardiopulmonary resucitation (CPR)
B. Blood pressure readings
When blood pressure is greater than the blood colloid osmotic pressure, there is
A. a net movement of fluid into the capillary.
B. a net movement of fluid out of the capillary.
C. less lymph formed.
D. a decrease in the volume of the interstitial fluid.
E. a decreased likelihood of edema.
B. a net movement of fluid out of the capillary.
From the heart to body tissues, which of the following sequences of vessels is correct?
A. Muscular artery, arteriole, elastic artery, capillary
B. Arteriole, muscular artery, elastic artery, capillary
C. Elastic artery, muscular artery, arteriole, capillary
D. Elastic artery, arteriole, muscular artery, capillary
E. Distributing artery, muscular artery, medium artery, capillary
C. Elastic artery, muscular artery, arteriole, capillary
Why would a person have anti-Rh antibodies present in their blood?
A. They are Rh-positive and were exposed to Rh-negative blood.
B. An Rh-negative woman is carrying an Rh-positive fetus.
C. All of the choices are correct.
D. They have the Rh antigen on the surface of their red blood cells.
B. An Rh-negative woman is carrying an Rh-positive fetus.
Identify the correct sequence of an action potential travelling through the heart.
A. Atrioventricular node, sinoatrial node, atrioventricular bundle, bundle branches, Purkinje fibers
B. Atrioventricular bundle, atrioventricular node, sinoatrial node, bundle branches, Purkinje fibers
C. Sinoatrial node, atrioventricular node, atrioventricular bundle, bundle branches, Purkinje fibers
D. Purkinje fibers, atrioventricular bundle, atrioventricular node, sinoatrial node, bundle branches
Atrioventricular node, sinoatrial bundle, atrioventricular node, bundle branches, Purkinje fibers
C. Sinoatrial node, atrioventricular node, atrioventricular bundle, bundle branches, Purkinje fibers
If someone has a blood pressure reading of 110/70 mm Hg, their pulse pressure would be __________ mm Hg.
A. 110
B. 70
C. 40
D. 180
E. 90
C. 40
Which of the following arteries is part of a circulatory pathway to the brain?
A. Radial artery
B. Cephalic artery
C. External jugular vein
D. Internal carotid artery
E. Axillary artery
D. Internal carotid artery