If the SA node is damaged, nodal rhythm is sufficient to sustain life.
True or False
True
Parasympathetic stimulation reduces heart rate.
True or False
True
Which of the following carry oxygen-poor blood.
a. Pulmonary veins and vena cavae.
b. Aorta and pulmonary veins.
c. Aorta and vena cavae.
d. Venae cavae and pulmonary arteries.
e. Pulmonary veins and pulmonary arteries.
D. Venae cavae and pulmonary arteries
The right atrioventricular valve (tricuspid) regulates the opening between the _________ and the _________.
...
Which of the following is not a feature of cardiac muscle?
...
electrical excitation from the pacemaker to a cardiocyte in the left ventricle (LV).
a. SA node, atrioventricular bundle, AV node. Purkinje fibers, cardiocyte in LV.
b. AV node, Purkinje fibers, atrioventricular bundle, SA node, cardiocyte in LV.
c. AV node, SA node, atrioventricular bundle, Purkinje fibers, cardiocyte in LV.
d. SA node, AV node, atrioventricular bundle, Purkinje fibers, cardiocyte in LV.
e. SA node, AV node, purkinje fibers, atrioventricular bundle, cardiocyte in LV
SA node, AV node, atrioventricular bundle, Purkinje fibers, cardiocyte in LV
SA node, AV node, atrioventricular bundle, Purkinje fibers, cardiocyte in LV.
Atrial depolarization causes.
a. The P wave.
b. The QRS complex.
c. The T wave.
d. The first heart sound.
e. The quiescent period.
a. The P wave.
When the left ventricle contracts, the __________ valve closes and the __________ valve is pushed open
a. Bicuspid; pulmonary.
b. Tricuspid; pulmonary.
c. Tricuspid; aortic.
d. Mitral; aortic.
e. Aortic; pulmonary.
d. Mitral; aortic.
Most of the ventricle filling occurs
a. During atrial systole.
b. When the AV valve is closed.
c. During ventricular systole.
d. During atrial diastole.
e. During isovolumetric contraction.
d. During atrial diastole.
The volume of blood ejected by each ventricle in one minute is called
a. The cardiac reserve.
b. The preload.
c. The afterload.
d. The stroke volume.
e. The cardiac output
e. The cardiac output.
Which of the following plasma proteins is most abundant?
a. albumin
b. globulins
c. fibrinogen
d.immunoglobulins
a. albumin
Hemoglobin
gives white blood cells their color.
transports oxygen in the blood.
is normally found in both the plasma and erythrocytes.
catalyzes the reaction that forms carbonic acid.
is only used once then decomposed.
Transports oxygen into the blood
An increase in hemoglobin increases
the ability of the blood to carry oxygen to various tissues.
the quantity of plasma protein available for blood clotting.
the leukocyte count.
the body's immune response
the ability of the blood to carry oxygen to various tissues.
Platelets
are also known as thrombocytes.
are actually fragments of cells.
play a role in preventing blood loss.
can become sticky when exposed to connective tissue
All of these choices are correct.
All of the above
Type AB blood
has no antigens on the red cells.
has O antigens on the red cells.
has both A and B antigens on the red cells.
has both A and B antibodies on the red cells.
has both A and B antibodies in the plasma.
has both A and B antigens on the red cells.
The hematocrit is
an estimate of blood flow/hour.
the number of WBCs per mm3.
the amount of hemoglobin by weight in the blood.
the percentage of RBCs in a given volume of blood.
the number of RBCs in the body.
the percentage of RBCs in a given volume of blood.
Agglutination of red blood cells means
they rupture.
they form a clot.
they clump together.
they lose their nucleus.
they bump into each other.
They clump together
The most numerous of the leukocytes is the
neutrophil.
basophil.
eosinophil.
lymphocyte.
monocyte.
neutrophil.
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
C) platelets - phagocytize bacteria
Erythropoietin
is a product of the kidney.
inhibits the production of erythrocytes.
is produced in response to increased blood pressure.
Is a product of the kidney
Iron
is needed to produce hemoglobin.
is a plasma coagulation factor.
is the binding site for carbon dioxide on the hemoglobin molecule.
prevents carbon monoxide from binding to hemoglobin.
interferes with the normal function of hemoglobin.
is needed to produce hemoglobin.
Afterload is
the name given to an increase in end-diastolic volume.
the arterial pressure that the ventricles must overcome to eject blood.
the amount cardiac output must increase during exercise.
another name for venous return.
the extent to which ventricular walls are stretched.
ventricles must overcome to eject blood.
The tricuspid valve is closed
during active filling of the ventricles.
when the mitral valve is open.
while the atria are contracting.
during ejection.
during passive filling of the ventricles.
During ejection
What event(s) occur during the QRS complex of an ECG?
depolarization of the atria
repolarization of the ventricles
depolarization of the atria and repolarization of the ventricles
depolarization of the ventricles and repolarization of the atria
...
In a normal electrocardiogram, the
P wave results from repolarization of the atria.
QRS complex results from ventricular depolarization.
P wave occurs after the QRS complex but before the T wave.
T wave represents depolarization of the atria.
repolarization of the atria is clearly visible.
...
The "pacemaker" of the heart is the
right bundle branch.
left bundle branch.
AV node.
SA node.
PM node.
SA node.
The AV valve that is located on the same side of the heart as the origin of the aorta is the
bicuspid or mitral valve.
tricuspid valve.
aortic semilunar valve.
pulmonary semilunar valve.
coronary sinus valve.
bicuspid or mitral valve.
Blood in the pulmonary veins returns to the
right atrium.
left atrium.
right ventricle.
left ventricle.
coronary sinus.
Left atrium
Art is 75. He has advanced arteriosclerosis. He is suffering from a number of manifestations, which are consistent with his arteriosclerosis. Over the past several years he has developed hypertension and he is beginning to show signs of renal failure. Which of the following are consistent with his condition?
increased resistance to blood flow
increased renin secretion from the kidneys
increased aldosterone secretion from the adrenal cortex
increased angiotensinogen formation
All of these choices is correct.
Save
All of the above
Which of the following would occur as a result of increased renin release by the kidneys?
an increase in vasodilator secretion
an increase in urine output
an increase in blood volume
a decrease in aldosterone
a decrease in blood pressure
C)an increase in blood volume
Which of the following hormones does NOT influence blood pressure?
ADH
Epinephrine
atrial natriuretic hormone
Aldosterone
growth hormone
Growth Hormone
Epinephrine
increases the heart rate but decreases the stroke volume.
causes vasodilation of coronary blood vessels.
causes vasoconstriction of blood vessels in skeletal muscle.
decreases red blood cell count.
decreases the force of contraction.
causes vasodilation of coronary blood vessels.
Which of the following events would cause a decrease in mean arterial blood pressure?
an increase in ADH production
release of atrial natriuretic factor
constriction of blood vessels in the skin
activation of the renin-angiotensin mechanism
an increase in aldosterone production
B)release of atrial natriuretic factor
Which of the following would increase resistance to blood flow?
a decrease in the length of the vessel
a decrease in the number of red blood cells
a decrease in blood viscosity
a decrease in the radius of the vessel
a decreased hematocrit
a decrease in the radius of the vessel
A blood pressure reading of 120/80 would
indicate a diastolic pressure of 120 mm Hg.
have Korotkoff sounds at pressures above 120 mm Hg.
indicate a systolic pressure of 120 mm Hg.
indicate a systolic pressure of 80 mm Hg.
would be considered hypertensive.
indicate a systolic pressure of 120 mm Hg.
In the pulmonary circulation, the _____ carry blood to the lungs.
carotid sinuses
pulmonary arteries
coronary arteries
superior vena cava and inferior vena cava
Aorta
pulmonary arteries
Arteries can constrict or dilate as needed because of the smooth muscle found in the
tunica intima.
tunica media.
tunica adventitia.
tunica externa.
tunica interna.
tunica media.
The exchange of nutrients and gases between the blood and tissue cells is the primary function of
veins.
arteries.
arterioles.
capillaries.
venules.
Capillaries
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?
arteriole, artery, capillary, vein, venule
capillary, arteriole, artery, vein, venule
artery, arteriole, capillary, venule, vein
vein, capillary, artery, arteriole, venule
artery, venule, capillary, arteriole, vein
artery, arteriole, capillary, venule, vein
Hemolytic disease of the newborn (HDN) occurs when
an Rh-positive woman is carrying an Rh-positive fetus.
an Rh-positive woman is carrying an Rh-negative fetus.
an Rh-negative woman is carrying an Rh-negative fetus.
an Rh-negative woman is carrying an Rh-positive fetus.
an Rh-negative woman is carrying an Rh-positive fetus.
Which blood type is considered the universal recipient?
Type A
Type B
Type AB
Type O
Type AB
A person with type B blood
has antigen A.
has anti-A antibodies .
will have a transfusion reaction if given type B blood.
has anti-B antibodies.
can receive type A blood.
has anti-A antibodies .