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