A&P Exam 2- Heart
how many pulmonary arteries empty into the right atrium of the heart
0
an increased amount of heparin in the blood might
slow the clotting process
if someone has a blood pressure of 110/70mm Hg, their pulse pressure would be
40 mm Hg.
a person with B blood has
Anti A antibodies
an obstruction in the inferior vena cava would hamper the return of blood from the
abdomen, pelvis and lower limbs
ventricular contraction begins at the
apex of the heart
vasoconstriction, cardiac output, cardiac rate affect
arterial blood pressure
the action potentials are slowed at the AV node to allow the
atria to complete their contraction
the P wave of an ECG represents
atrial depolarization
which of the following chemical substances, when released into the blood would cause blood pressure to decrease
atrial natriuretic hormone
in adults, red blood cells are made in one place, spend most of their lifespan in another, and most are finally destroyed in another place. Which choice lists these locations in correct chronological order:
bone marrow, blood vessels, spleen
the produce of the stroke volume times the heart rate is known as the
cardiac output
which of the following is mismatched
closing of calcium channels-plated phase
fibrinolysis is responsible for
clot dissolution
the chord tendon
connect the flaps of the AV valves to the papillary muscles
pre capillary sphincters
control the blood flow into the capillary beds
during exercise, arterioles to the skeletal muscles
dilate in response to increased muscle metabolites
the tricuspid valve is closed
during ejection
all blood vessels are lined with
endothelial cells
damage to tissue stimulates the activation of ____ blood clotting pathway
extrinsic
the velocity of blood flow inside a blood vessel is
faster in the center of the blood vessels
the final protein that forms a blood clot is
fibrin
what has all these features, has no pumping mechanism between capillary beds, allows the liber to detoxify substances entering the body through digestive track to the liver, begins and ends with capillary beds
hepatic portal system
Randolph suffers from severe hepatitis
his skin appeared to be jaundiced. the color change was do to: increased bilirubin in his circulatory system
increased vagal stimulation would cause the heart rate to
increase
during exercise all of the following occur exdpt
increased vasoconstriction of coronary arteries
which of the following would decrease the velocity of blood flow
increased viscosity
during isovolumtric ventricular contraction ventricular pressure is
increasing
erthropoetin
is the product of the kidney
blood does not enter or leave ventricles during the period called
isovolumetric contraction
blood in the right pulmonary vents returns to the
left atrium
a thrombus in the second branch off of the aortic arch would affect the flow of blood to the
left side of the head and heart
plasma is____ while formed elements are____
liquid portion of blood, the cells when the wrong good type is given to a patient, the antibodies in the patients blood react with the antigens on the surface of the transfused blood causing a reaction called: nose of these
which of the following cel types is incorrectly matched with its description
lymphocytes-become macrophages
chemoreceptors sensitive to blood carbon dioxide levels are primary located in the
medulla oblongata
the greater the compliance
more easily the vessel wall stretches
neutrophils of the blood are derived from a population stems called
myoblasts
which of the following layers forms the bulk of the heart wall
myocardium
which type of material is not transported by the blood
neurotransmitters
the cardiac control center of the ____ coordinates the autonomic innervation of the heart
none of these
within the blood vessels, valves are found in the
none of these
which type of veins connect two primary capillary networks
portal veins
blood is moved through the vascular system by
pressure created by the heart
constriction of the papillary muscles would
prevent the AV values from producing into the atria
the ____are the last part of the elegiacal conducting system of the hearts
pukinje fibers
the valve located between the right ventricle and the pulmonary trunk is the
pulmonary semilunar valve
according to Poiseuille's law
resistance increases, flow decreases
heart murmurs may be caused by____, a condition in which valves are thickened and calcified
stenosis
the amount of blood ejected by the ventricles per beat is termed the
stroke volume
the delivery of oxygen and nutrients to the tissues of the body is accomplished through____ circulation
systemic
contraction of the ventricles is referred to as ventricular
systole
concerning heart sounds which of the following is correct
the first heart sound occurs at the beginning of ventricular systole
erythroblansosis fetaliss may occur when
the mother has RH- blood and the fetus has RH+
the period of isovoumetric interaction is immediately followed by..
the period of ejection
when the blood pressure of a vessel drops below the critical closing pressure of that vessel
the vessel collapses
a blood clot attached to a blood vessel wall is called a
thrombus
each hemoglobin molecule
transports four oxygen molecules
which of the following has the most important effect on blood velocity
vessel radius
what is taken up by the capillaries at their venous end
waste products