Transcript Cardiac Cycle

Cardiac Cycle
This quiz will require you to apply
concepts from the cardiac cycle
and control of blood flow.
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After blood enters the right atrium,
it goes through the:
Bicuspid valve
Tricuspid valve
Inferior vena cava
Pulmonary trunk
Mitral valve
Coronary arteries
The left atrium receives blood from
the:
Right atrium
Superior vena cava
Left ventricle
Lungs
Hepatic portal vein
Systemic arteries
The bicuspid valve is between:
Left atrium and
right atrium
Right atrium and
Right ventricle
Left atrium and
Left ventricle
Pulmonary veins and
Left atrium
Left atrium and
Right ventricle
Superior vena cava and
Left atrium
The pulmonary circuit runs from
the:
Pulmonary vein to
aorta
Left ventricle to
Cerebral arteries
Right atrium to
Pulmonary semilunar valve
Right atrium to
Iliac artery
Left atrium to
left ventricle
Pulmonary trunk to the
Left atrium
In the pulmonary circuit, you find
the blood with the least Oxygen in
the:
Pulmonary veins
Pulmonary capillaries
Pulmonary arteries
Left atrium
Pulmonary venules
Inferior vena cava
Red blood cells in pulmonary
capillaries:
Pick up O2,
Drop off CO2
Drop off O2,
Drop off CO2
Pick up CO2,
Drop off O2
Divide to form
reticulocytes
Pick up O2,
Pick up CO2
Secrete erythropoietin
Systole happens when:
Atria contract
Ventricles contract
Semilunar valves close
The heart is filling
with blood
AV valves open
The heart is
relaxing
During diastole:
The heart is
relaxed
The ventricles contract
Blood flows into
the aorta
Blood flows though
The semilunar valves
The AV valves are
closed
The semilunar valves
Are open
The ‘pacemaker’ cells that start a
heart beat are in:
The atrial septum
The interventricular
septum
The left ventricle
The superior
vena cava
The right atrium
The papillary
muscles
The pacemaker is called:
The node of Ranvier
The AV node
The semilunar
valve
The SA node
The papillary
muscle
The chordae
tendinae
The cells in the SA node fire
because:
A neurotransmitter
attaches to them
The cells next to
them have fired
They receive an
electrical impulse
Their acetylcholine
receptors are stimulated
Ca2+ leaks into
the cells
The SNS is activated
When cardiac muscle cells have
depolarized, they:
Open their Na+ channels
Remain depolarized
for a while
Close K+ channels
Repolarize
Close Ca2+ channels
Remain at
resting potential
The P wave indicates:
Ventricular repolarization
Atrial depolarization
Ventricular depolarization
Atrial repolarization
Atrial hyperpolarization
Ventricular
hypopolarization
The T wave indicates:
Ventricles relaxing
Atria depolarizing
Atria contracting
Atria repolarizing
Ventricles contracting
Ventricles
repolarizing
If the Bundle of His is damaged,
you see:
A shortened PR interval
Multiple rapid P waves
A widened QRS complex
No QRS complexes
High, pointed T waves
A prolonged PR interval
The first heart sound is caused
when:
Ventricles relax
AV valves close
Semilunar valves close
Ventricles repolarize
ANF is secreted
The heart is empty
If the semilunar valves didn’t close
properly, you would hear:
No heart sounds
A murmur in the carotids
A murmur during systole
A murmur throughout
the heartbeat
No first heart sound
A murmur during diastole
If heart rate increases, Cardiac
Output will:
Depend on
peripheral resistance
Increase
Depend on
blood pressure
Not be affected
Decrease and
then increase
Decrease
Peripheral Resistance is:
The amount of blood
pumped out of the heart
in one minute
How hard it is
to push blood through
the blood vessels
The pressure blood
exerts against the walls
of the arteries
A person’s ability
to maintain blood pressure
when conditions change
How high blood
would rise in a cannula
inserted into the artery
the amount of blood
entering a tissue divided by
the number of capillaries
If Blood Pressure goes down:
Low BP will
cause low PR
The body can fix it
by lowering PR
CO will decrease
PR and CO
will both decrease
The body can raise
it by increasing CO
The body will
activate the PNS
To increase peripheral resistance:
Vasoconstrict arterioles
Vasodilate capillaries
Vasoconstrict capillaries
Increase blood pressure
Vasodilate arterioles
Increase heart rate
When blood volume increases:
SV increases
PR increases
CO decreases
BP decreases
PR decreases
HR increases