Mechanical Anatomy of the Heart Quiz

Which of the following is incorrect regarding the endocardium? A) 5-6 cells thick B) Continuous layer throughout the vascular system C) 3-4 cells thick D) Lines the valves of the heart

A) 5-6 cells thick

Which of the following is true about arteries? A) Carries blood away from the heart. B) Carries oxygenated blood towards the heart. C) Carries deoxygenated blood away from the heart. D) Carries deoxygenated blood towards the heart.

A) Carries blood away from the heart

Which of the following is true about veins? A) Carries blood towards the heart. B) Carries oxygenated blood towards the heart. C) Carries deoxygenated blood away from the heart. D) Carries oxygenated blood away from the heart.

A) Carries blood towards the heart

Which of the following is correct about the right coronary artery? A) Does not perfuse the AV node in 10% of the population. B) Perfuses the SA node in 45% of the population. C) Perfuses the Left Atrium. D) Perfuses the Left Ventricle.

A) Does not perfuse the AV node in 10% of the population

Which of the following coronary arteries perfuses the AV node in 10% of the population? A) Left circumflex B) Right coronary artery C) Left anterior descending D) Right marginal branch

A) Left circumflex

Which layer of the heart makes up the bulk of the myocardial tissue? A) Epicardium B) Myocardium C) Endocardium D) Pericardium

B) Myocardium

Which of the following is NOT a blood vessel that feeds the right atrium? A) Superior vena cava B) Pulmonary artery C) Coronary sinus D) Inferior vena cava

B) Pulmonary artery

The endocardium is a continuous layer throughout the vascular system, but changes names in the vascular system. What is it called? A) Trabeculae carneae B) Tunica intima C) Sarcolemma D) Visceral layer

B) Tunica intima

The valve between the left atrium and the left ventricle is called the: A) Pulmonic semilunar valve B) Aortic semilunar valve C) Bicuspid valve D) Tricuspid valve

C) Bicuspid valve

Which of the following carries deoxygenated blood from the heart tissue itself back to the right atrium? A) Superior vena cava B) Pulmonary artery C) Coronary sinus D) Inferior vena cava

C) Coronary sinus

Which of the following is the main vein that empties deoxygenated blood from the myocardium into the right atrium? A) Pulmonary artery B) Pulmonary Vein C) Coronary Sinus D) Right Coronary Artery

C) Coronary sinus

The anatomical structure that prevents myofibrils from being ripped apart from each other during forceful contractions are known as: A) Myosin B) Intercalated discs C) Desmosome D) Mitochondrion

C) Desmosome

The heart tissue that is responsible for contraction is known as the: A) Pericardium B) Epicardium C) Myocardium D) Endocardium

C) Myocardium

Which of the following is incorrect about the right coronary artery? A) Perfuses the Right Atrium of the heart. B) Perfuses the Right Ventricle of the heart. C) Perfuses the SA node in 45% of the population. D) Does not perfuse the SA node in 45% of the population.

C) Perfuses the SA node in 45% of the population

Which of the following is not found within the fibrosa? A) Blood vessels B) Nerves C) Platelets D) Lymphatics

C) Platelets

Which of the following is true about the Left Coronary Artery? A) Perfuses the Right Atrium. B) Perfuses the Right Ventricle. C) Purpose is to bifurcate into the LAD and LCX. D) Perfuses the SA node in 55% of the population.

C) Purpose is to bifurcate into the LAD and LCX

Which of the following is NOT true regarding the position of the heart? A) Size of a fist. B) Located in the anterior aspect of the chest. C) Rests below the diaphragm. D) Located near the middle of the mediastinum.

C) Rests below the diaphragm

Which valve separates the right atrium from the right ventricle? A) Mitral valve B) Bicuspid valve C) Tricuspid valve D) Aortic valve

C) Tricuspid valve

Which of the following is NOT true regarding papillary muscles? A) Located on the inner surface of the ventricles. B) Attach directly to Chordae Tendineae. C) Very tough fibrous connective tissue. D) Work with Chordae Tendineae to keep blood from flowing backwards through the heart.

C) Very tough fibrous connective tissue

How many layers does the pericardial sac have? A) 2 B) 4 C) 5 D) 3

D) 3

The anatomical structure that is considered a relay station and continues the propagation of an electrical signal through the myofibrils is called: A) Myosin B) Intercalated discs C) Actin D) Gap junctions

D) Gap junctions

The anatomical structure that connects myofibrils together is called: A) Desmosome B) Myosin C) Actin D) Intercalated discs

D) Intercalated discs

Which of the following is incorrect regarding the serosa? A) Inner layer of the pericardium. B) Prevents friction between the heart and the fibrosa. C) Contains lubricant that allows the heart to beat within the pericardial sac. D) Is a part of the visceral layer of the heart.

D) Is a part of the visceral layer of the heart

Which of the following is true regarding the septum and the left ventricular wall? A) The septum and left ventricular wall are thinner because they require a higher pressure to pump blood to the body. B) The septum and left ventricular wall are the same size as the right ventricular wall because the pressure within the chambers is equal. C) The septum and left ventricular wall are the same size as the right atrial wall because the pressure within the chambers is equal. D) The septum and the left ventricular wall are thicker because the pressure is higher in the left ventricle and more force is required to pump blood out of the heart to the body.

D) The septum and the left ventricular wall are thicker because the pressure is higher in the left ventricle and more force is required to pump blood out of the heart to the body.

Which of the following is the correct sequence of blood through the heart valves? A) Aortic, Tricuspid, Bicuspid, Pulmonary B) Bicuspid, Pulmonary, Tricuspid, Aortic C) Pulmonary, Tricuspid, Bicuspid, Aortic D) Tricuspid, Pulmonary, Bicuspid, Aortic

D) Tricuspid, pulmonary, bicuspid, aortic

Which of the following coronary arteries does not perfuse the AV node in 90% of the population? A) LAD B) LCX C) RCA D) LCA

B) LCX

Which of the following coronary arteries perfuses the apex of the heart? A) Right Coronary Artery B) Left Anterior Descending C) Left Circumflex D) Right Marginal Branch

B) Left anterior descending

Bachmann's bundle is located in what anatomical structure of the heart? A) Right atrium B) Left atrium C) Right ventricle D) Left ventricle

B) Left atrium

Which of the following coronary arteries is responsible for perfusing the SA node in 45% of the population? A) Right Coronary Artery B) Left Circumflex C) Left Anterior Descending D) Right Marginal Branch

B) Left circumflex

The heart is: A) Positioned partially to the right side of the sternum. B) Located between the lungs in the thoracic cavity. C) Positioned directly in the center of the chest behind the sternum. D) Responsible for the formation and distribution of red blood cells.

B) Located between the lungs in the thoracic cavity