Medical Knowledge Diagnostic Procedures & Imaging

Question 1

What does an electrocardiogram (ECG/EKG) primarily measure?

Accepted Answer

Electrical activity of the heart

Answer

An ECG measures the electrical impulses generated by the heart, producing the characteristic P-QRS-T waveform used to assess rhythm and detect cardiac abnormalities.

Question 2

Which imaging modality does NOT use ionizing radiation to create images?

Accepted Answer

Magnetic Resonance Imaging (MRI)

Answer

MRI uses strong magnetic fields and radiofrequency pulses rather than ionizing radiation, making it safer for repeated use and preferred for sensitive populations.

Question 3

What is the normal resting heart rate range for a healthy adult?

Accepted Answer

60–100 beats per minute

Answer

A normal adult resting heart rate is 60–100 beats per minute; values below this range indicate bradycardia and values above indicate tachycardia.

Question 4

Which laboratory tests are most commonly used to evaluate renal (kidney) function?

Accepted Answer

Serum creatinine and blood urea nitrogen (BUN)

Answer

Serum creatinine and BUN reflect the kidneys' ability to filter waste products from the blood, making them the primary markers of renal function.

Question 5

What does a Complete Blood Count (CBC) primarily assess?

Accepted Answer

Red blood cells, white blood cells, and platelets

Answer

A CBC evaluates the three main cellular components of blood—red blood cells, white blood cells, and platelets—along with hemoglobin and hematocrit values.

Medical Knowledge Practice Test

Medical Knowledge Practice Test

Medical Knowledge Diagnostic Procedures & Imaging