A&P II Lab quiz 3

a) adventitia b) externa c) intima d) media e) interna D) media

the muscular layer in the wall of a blood vessel is the tunica

a) ligamentum arteriosum b) biscuspid valve c) pulmonary semilunar valve d) aortic semilunar valve e) cusp of tricuspid valve E) cusp of tricuspid valve

identify the structure labeled 6.

a) papillary muscles b)trabeculae carneae c)chordae tendineae d) moderator band e)pectinate muscles A) papillary muscles

identify the structure labeled 8.

a) cardiac output will increase b) the ventricular beat will remain unchanged c) the ventricles will beat more slowly d) the ventricles will beat faster e) the atria will contract more forcefully C) the ventricles will beat more slowly

if the connection between the SA node and AV node becomes blocked,

a) the atrioventricular node b) the sinoatrial node c) both the left and right ventricles d) the Purkinje fibers e) the wall of the left ventricle B) the sinoatrial node

the normal pacemaker of the heart is located in

a) capillaries b) artery c) vein d) arteriole e) venule B) artery

in what vessel is blood pressure the highest?

a) the gallbladder b) the brain c) the liver d) a man's clenched fist e) the hand of a 10-year-old D) a man's clenched fist

the adult heart is roughly the size of

a) right atrium b) pulmonary circuit c) right ventricle d) lungs e) aorta E) aorta

the left ventricle pumps blood to the

a) T wave b) P-R interval c) R-T interval d) P wave e) QRS complex E) QRS complex

abnormally slow depolarization of the ventricles would most change the shape of the ___________ in an ECG tracing.

a) arterioles b) capillaries c) veins d) arteries e) venules E) venules

after blood leaves the capillaries, it enters the

a) ulnar b) axillary c) radial d) digital e) brachial B) axillary

after passing the first rib, the subclavian artery becomes the __________ artery.

a) iliac b) peroneal c) deep femoral d) popliteal e) tibial D) Popliteal

at the knee, the femoral artery becomes the __________ artery.

a) external jugular b) cephalic c) innominate d) subclavian e) azygos D) subclavian

at the level of the first rib, the axillary vein becomes the __________ vein.

a) aortic semilunar valve b) ligamentum arteriosum c) bicuspid valve d) pulmonary semilunar valve e) tricuspid valve D) pulmonary semilunar valve

identify the structure labeled 19.

a) tricuspid valve b) pulmonary semilunar valve c)biscuspid valve d) aortic semilunar valve e) ligamentum arteriosum E) ligamentum arteriosum

identify the structure labeled 21.

a) ventricular repolarization b) ventricular contraction c) atrial depolarization d) ventricular depolarization e) atrial repolarization A) ventricular repolarization

the T wave on an ECG tracing represents

a) tricuspid b) bicuspid c) semicaval d) pulmonic e) semilunar B) bicuspid

the ___________ valve prevents back ward flow into the left atrium.

a) in both directions b) in opposite directions on the right and left c) from a ventricle to an atrium d) in many directions e) in one direction only E) in one direction only

the atrioventricular valves permit blood flow

a) coronary sulci b) chordae tendineae c) interatrial septa d) papillary muscles e) trabeculae carneae B) chordae tendineae

the cusps (leaflets) of atrioventricular valves attach directly to

a) right and left lungs b) aorta c) right atrium d) left ventricle e) left atrium A) right and left lungs

the right ventricle pumps blood to the

a) channeling blood away from the heart b) channeling blood toward the heart c) preventing anterograde flow d) preventing blood from re-entering a ventricle e) regulating blood pressure in veins B) channeling blood toward the heart

venous valves are responsible for

a) capillaries b) arteries c) veins d) arterioles e) venules C) veins

what vessels hold the largest percentage of the blood supply?

a) 5 b) 10 c) 13 d) 16 e) both 5 and 16 D) 16

which chamber receives oxygenated blood from the pulmonary circuit?

a) vein b) venule c) arteriole d) artery e)capillary C) arteriole

which kind of vessel is also called a resistance vessel?

a) external elastic membrane b) tunica intima c) tunica media d) tunica externa e) internal elastic membrane B) tunica intima

which of the following is the innermost layer of a blood vessel?

a) pulmonary semilunar b) bicuspid c) aortic semilunar d) tricuspid e) mitral D) tricuspid

blood flowing into the heart from the venae cavae flows through the __________ valve.

a) bicuspid valve b)aortic valve c) tricuspid valve d) pulmonary valve e) mitral valve D) pulmonary valve

blood leaves the right ventricle by passing through the

a) parasympathetic innervation b) blood volume c) cardiac output d) force of cardiac contraction e) peripheral resistance A) parasympathetic innervation

blood pressure increases with all of the following except increased

a) arteries b) venules c) arterioles d) veins e) capillaries D) veins

blood pressure is lowest in the

a) left atrium b) right ventricle c) left ventricle d) right atrium e) conus arteriosus A) left atrium

blood returning to the heart from the pulmonary circuit first enters the

a) right atrium b) left ventricle c) right ventricle d) conus arteriosus e) left atrium A) right atrium

blood returning to the heart from the systemic circuit first enters the

a) continuous capillaries b) sinusoidal capillaries c) fenestrated capillaries d) sinusoids e) vasa vasorum A) continuous capillaries

capillaries that have a complete lining are called

a) have more smooth muscle in their tunica media b) are more elastic c) hold their shape better when cut d) have thinner walls e) have a pleated endothelium D) have thinner walls

compared to arteries, veins

a) QRS complex b) P wave c) QT interval d) T wave e) S-T segment B) P wave

depolarization of the atria corresponds to the EKG's

a) PR complex b) QRS complex c) S wave d) P wave e) T wave B) QRS complex

depolarization of the ventricles is represented on an electrocardiogram by the