Cardio-Repi Intro Quiz

Which of the following structures prevents backflow of blood from the right ventricle into the right atrium?

• Pulmonary valve

• Tricuspid valve

• Mitral valve

• Aortic valve

The pacemaker potential in the SA node is primarily due to:

• Rapid sodium influx

• Potassium efflux

• Slow calcium influx and reduced potassium efflux

• Chloride influx

The functional residual capacity (FRC) is defined as:

• Tidal Volume + Inspiratory Reserve Volume

• Residual Volume + Expiratory Reserve Volume

• Inspiratory Capacity – Tidal Volume

• Vital Capacity – Expiratory Reserve Volume

During inspiration, the diaphragm contracts and moves:

• Upward, increasing thoracic volume

• Downward, increasing thoracic volume

• Upward, decreasing thoracic volume

• Downward, decreasing thoracic volume

Which part of the respiratory tract is lined by pseudostratified ciliated columnar epithelium with goblet cells?

• Alveoli

• Trachea

• Respiratory bronchiole

• Terminal bronchiole

The left lung differs from the right lung in that it:

• Has three lobes and two fissures

• Has a cardiac notch and lingula

• Has horizontal and oblique fissures

• Is shorter and wider

Which coronary artery most commonly supplies the SA node?

• Left anterior descending artery

• Right coronary artery

• Circumflex branch of left coronary artery

• Posterior descending artery

Which Coronary Artery Supplies Left Myocardial Wall?

Which nerve provides motor supply to the diaphragm?

• Vagus nerve

• Phrenic nerve

• Intercostal nerves

• Sympathetic chain

The surfactant in the lungs is secreted by:

• Type I pneumocytes

• Type II pneumocytes

• Alveolar macrophages

• Club (Clara) cells