Cardiovascular System 3

What is cardiac output calculated by?

• Heart rate multiplied by stroke volume
• Blood pressure divided by heart rate
• Stroke volume minus heart rate
• Total lung capacity divided by heart rate

Which structure initiates the heartbeat?

• Bundle of His
• Purkinje fibers
• SA node
• AV node

The dorsalis pedis pulse is located in which area?

• Behind the knee
• Top of the foot
• Inside of the wrist
• Upper thigh

What does the P wave represent on an ECG?

• Ventricular repolarization
• Bundle branch activation
• Ventricular depolarization
• Atrial depolarization

Which volume of air remains in the lungs after maximal expiration?

• Tidal volume
• Vital capacity
• Residual volume
• Inspiratory reserve volume

The conducting zone of the respiratory system includes:

• Alveoli and alveolar ducts
• Trachea and bronchi
• Respiratory bronchioles
• Terminal alveoli

What is measured by pulse oximetry?

• Blood pressure
• Oxygen saturation in blood
• Heart rhythm
• Respiratory rate

Which structure connects the oral cavity to the trachea?

• Epiglottis
• Nostril
• Pharynx
• Bronchus

A normal PR interval on an ECG ranges from:

• \(0.12-0.20\) seconds
• \(0.04-0.08\) seconds
• \(0.35-0.40\) seconds
• \(0.50-0.60\) seconds

The ankle-brachial index is used to diagnose:

• Cardiac arrhythmia
• Respiratory failure
• Heart valve disease
• Peripheral artery disease