Chapter 11/12 test - Anatomy
Blood leaves the left ventricle through an artery known as the ________.
Aorta
the SA node is the pacemaker of the intrinsic conduction system of the heart.
True
the functional blood supply that oxygenates the myocardium is provided by the right and left coronary arteries.
True
These vessels carry blood away from the heart
arteries
These vessels have thicker walls and a heavier tunica media
arteries
the aorta is classified as on of these vessels
arteries
the path of blood flow within the systemic vascular system is __________
arteries, arterioles, capillary beds, veinules, veins
receiving chambers are the __________ while the discharging chambers are the __________
atria; ventricles
the atrioventricular valves are closed when ___________
atrial pressure is less than ventricular pressure
the vagus nerve that carries signals to slow down the heart rate is part of the __________ nervous system that controls the heart
autonomic
pulmonary arteries transport __________.
blood rich in carbon dioxide to the lungs
Venules drain these tiny beds of vessels
capillaries
which type of blood vessel is constricted only by the tunica intima?
capillaries
the heart sounds "lub" and "dup" result from __________
closure of heart valves
Which vessel carries deoxygenated blood from cardiac circulation to the right atrium of the heart?
coronary sinus
the layer of the heart wall synonymous with the visceral layer of the serous pericardium is __________
epicardium
a blood pressure reading of 120/80 is a reading of diastolic pressure over systolic pressure
false
the inferior vena cava returns blood to the heart from all body regions above the diaphragm
false
The walls of the ________ are substantially thicker because that chamber acts as the more powerful systemic pump of the heart.
left ventricle
what organ receives blood from the hepatic portal vein
liver
the heart is situated within the medial section of the thoracic cavity known as the __________
mediastinum
the friction blood encounters as it flows through the vessels is called __________
peripheral resistance
arteries carry red blood and veins carry blue blood. the exception to this rule is the __________ vessels
pulmonary
the sinoatrial (SA) node is located in the __________
right atrium
coronary artery disease results from
the accumulation of fatty, calcified deposits within blood vessels
the average heart beats approximately 75 times per minute at rest
true
the correct sequence of layers of a typical blood vessel, from superficial to deep, are __________
tunica externa, tunica media, tunica intima
arteries have thicker walls than veins because this layer is thicker
tunica media
Due to low pressure in these vessels, skeletal muscle activity aids the return of blood by milking it along in these vessels toward the heart.
veins
the mitral valve is normally closed when __________
when the ventricle is in systole
which of the following represents the correct path for the transmission of an impulse in the intrinsic conduction system in the heart?
SA node, AV node, AV bundle, bundle branches, purkinje fibers (a)
blood pressure taken in your arm is measured in the __________
brachial artery
micro circulation occurs in these vessels
capillaries
What are the tiny white cords that anchor the cusps or flaps of endocardium to the walls of the ventricles?
chordae tendineae
stroke volume is the amount of blood pumped out by each ventricle of the heart in one minute
false
the heart sound occurs when the atria contracts and subsequently when the ventricles contract
false
the renal veins carry oxygen-rich blood to the kidneys
false
Stroke Volume * __________ = cardiac output
heart rate
the external carotid artery serves the skin and muscles of the head and __________
neck
During ventricular systole, blood is ejected from the ventricles through the large arteries connected to the heart.
true
Reductions in venous return cause reductions in both stroke volume and cardiac output.
true
When precapillary sphincters are closed, blood flows through the shunts and bypasses the tissue cells.
true
exchanges between blood and tissue cells occur in capillary beds
true
the aorta is the largest artery in the body and the different parts are the ascending aorta, aortic arch, thoracic aorta, and the abdominal aorta
true
the hepatic veins drain the blood from the liver and return it to the inferior vena cava
true
with the exception of the capillaries, the three layers of a vessel are the tunica intima, tunica media, and tunica externa
true
These vessels return blood to the heart
veins
some of these vessels have valves to prevent back flow
veins
superior and inferior vena cava are classified as these types of vessels
veins
these vessels have thinner walls and transport oxygen-poor blood
veins