BIOS 214 EXAM 4 QUESTIONS & VERIFIED
ANSWERS
Unlike skeletal muscle, cardiac muscle has
A. A more extensive sarcoplasmic reticulum
B. Numerous nuclei per cell
C. More mitochondria
D. Longer fibers
E. Fewer junction between cells - answers - c
Blood in the pulmonary veins returns to
A. The right atrium
B. The right ventricle
C. The left atrium
D. The left ventricle
E. The coronary sinus - answers - c
What is the pacemaker that sets the rate of the heartbeat?
A. The av node
B. The purkinje fibers
C. The vagus nerve
D. The sa node
E. The bundle of his - answers - d
A valve damaged by rheumatic fever fails to open completely. This condition is known
as
A. An mi
B. Stenosis
C. A murmur
D. A stroke
E. Fibrillation - answers - b
A myocardial infarction
A. Is caused by an ectopic focus regulating heart contractions
B. Is due to a bundle branch block
C. Results from an enlarged left ventricle
D. Is related to a mitral valve prolapse
E. None of these choices are correct - answers - e
, Which vessel supplies blood to both ventricles and the anterior interventricular septum?
A. The right coronary artery
B. The anterior interventricular branch
C. The circumflex branch
D. The right marginal branch
E. The posterior interventricular branch - answers - b
Blood leaves the right ventricle through?
A. The pulmonary semilunar valve
B. The pulmonary tricuspid valve
C. The tricuspid valve
D. The bicuspid valve
E. The aortic semilunar valve - answers - a
What condition is characterized by rapid, uncoordinated contraction of cardiac
myocytes?
A. Fibrillation
B. Congestive heart failure
C. Endocarditis
D. Cardiac tamponade
E. Myocardial infarcation - answers - a
The coronary arteries arise from
A. The proximal end of the aorta
B. The interventricular arteries
C. The myocardium
D. The coronary sulcus
E. The venae cavae - answers - a
What fetal structure carries blood from the pulmonary trunk to the aorta?
A. Truncus arteriosus
B. Ductus arteriosus
C. Bulbs cordis
D. Sinus venosus
E. Foramen ovale - answers - b
Where is the thickest part of the myocardium?
A. The walls of the right ventricle
B. The walls of the right atrium
ANSWERS
Unlike skeletal muscle, cardiac muscle has
A. A more extensive sarcoplasmic reticulum
B. Numerous nuclei per cell
C. More mitochondria
D. Longer fibers
E. Fewer junction between cells - answers - c
Blood in the pulmonary veins returns to
A. The right atrium
B. The right ventricle
C. The left atrium
D. The left ventricle
E. The coronary sinus - answers - c
What is the pacemaker that sets the rate of the heartbeat?
A. The av node
B. The purkinje fibers
C. The vagus nerve
D. The sa node
E. The bundle of his - answers - d
A valve damaged by rheumatic fever fails to open completely. This condition is known
as
A. An mi
B. Stenosis
C. A murmur
D. A stroke
E. Fibrillation - answers - b
A myocardial infarction
A. Is caused by an ectopic focus regulating heart contractions
B. Is due to a bundle branch block
C. Results from an enlarged left ventricle
D. Is related to a mitral valve prolapse
E. None of these choices are correct - answers - e
, Which vessel supplies blood to both ventricles and the anterior interventricular septum?
A. The right coronary artery
B. The anterior interventricular branch
C. The circumflex branch
D. The right marginal branch
E. The posterior interventricular branch - answers - b
Blood leaves the right ventricle through?
A. The pulmonary semilunar valve
B. The pulmonary tricuspid valve
C. The tricuspid valve
D. The bicuspid valve
E. The aortic semilunar valve - answers - a
What condition is characterized by rapid, uncoordinated contraction of cardiac
myocytes?
A. Fibrillation
B. Congestive heart failure
C. Endocarditis
D. Cardiac tamponade
E. Myocardial infarcation - answers - a
The coronary arteries arise from
A. The proximal end of the aorta
B. The interventricular arteries
C. The myocardium
D. The coronary sulcus
E. The venae cavae - answers - a
What fetal structure carries blood from the pulmonary trunk to the aorta?
A. Truncus arteriosus
B. Ductus arteriosus
C. Bulbs cordis
D. Sinus venosus
E. Foramen ovale - answers - b
Where is the thickest part of the myocardium?
A. The walls of the right ventricle
B. The walls of the right atrium
