What is responsible for transporting oxygen, nutrients, hormones, and waste products throughout the body?

• Cardiovascular System

• Respiratory System

• Digestive System

• Nervous System

What is the formula for the Cardiothoracic Ratio (CTR)?

• CTR = Cardiac Width / Thoracic Width

• CTR = Thoracic Width / Cardiac Width

• CTR = Cardiac Width + Thoracic Width

• CTR = Cardiac Width - Thoracic Width

What does a CTR greater than 50% on a PA chest X-ray suggest?

• Normal heart size

• Cardiomegaly

• Heart failure

• Hypertension

What is the condition characterized by persistently high blood pressure?

• Hypotension

• Hypertension

• Arrhythmia

• Angina Pectoris

What is the term for chest pain due to reduced oxygen supply to the heart?

• Angina Pectoris

• Myocardial Infarction

• Aneurysm

• Arrhythmia

What is the primary function of the respiratory system?

• Gas exchange

• Nutrient absorption

• Hormone regulation

• Waste elimination

What is the role of the diaphragm in the respiratory system?

• Controls breathing

• Filters air

• Produces sound

• Conducts air to the lungs

What is the term for the process of gas exchange in the body?

• Ventilation

• Respiration

• Inhalation

• Exhalation

What are the common viruses associated with viral pneumonia?

• Influenza

• Respiratory Syncytial Virus (RSV)

• Bacterial infections

• All of the above

What is the key imaging sign for COVID-19 pneumonia?

• Bilateral ground-glass opacities

• Localized dense white opacities

• Patchy, widespread opacities

• Normal lung appearance