Cardiovascular System Quiz

What is the primary function of the SA node in the heart?

• It regulates blood pressure.

• It generates the electrical impulse that initiates the heart's rhythmic contractions.

• It prevents backflow of blood into the heart.

• It oxygenates the blood.

Which of the following best describes the relationship between cardiac output, heart rate, and stroke volume?

• Cardiac output is independent of heart rate and stroke volume.

• Cardiac output decreases as heart rate and stroke volume increase.

• Cardiac output is the product of heart rate and stroke volume.

• Cardiac output is the sum of heart rate and stroke volume.

What is the main difference between systole and diastole phases of the heart?

• Systole is the contraction phase, while diastole is the relaxation phase.

• Systole is the relaxation phase, while diastole is the contraction phase.

• Systole involves the closing of heart valves, whereas diastole involves their opening.

• Systole decreases the heart rate, whereas diastole increases it.

Which anatomical features are unique to fetal circulation?

• Presence of the mitral valve.

• Presence of ductus arteriosus and foramen ovale.

• Presence of pulmonary veins.

• Presence of coronary arteries.

What is the mediastinum?

• A muscle in the heart

• The outer layer of the heart

• The space between the two pleural cavities

• A valve in the heart

What is the interpleural space also known as?

• Pericardium

• Mediastinum

• Endocardium

• Epicardium

What is the primary function of the outer fibrous pericardium as described in the image?

• To pump blood

• To protect the heart

• To regulate heart temperature

• To control heart rate

According to the image, how many layers does the pericardium have?

• One

• Two

• Three

• Four

What is the pericardium primarily made of?

• Muscle tissue

• Nervous tissue

• Fibrous connective tissue

• Epithelial tissue

Which part of the pericardium is directly in contact with the heart?

• Outer fibrous pericardium

• Inner serous pericardium

• Visceral pericardium

• Parietal pericardium