CBET - Certified Biomedical Equipment Technician Anatomy and Physiology Basics Questions and Answers

Question 1

A patient is connected to an ECG monitor. The waveform displayed represents the electrical activity of which organ system?

Accepted Answer

Cardiovascular system

Answer

The electrocardiograph (ECG or EKG) is specifically designed to measure and record the electrical signals generated by the heart, which is the central organ of the cardiovascular system. These signals correspond to the depolarization and repolarization of the heart muscle during the cardiac cycle.

Question 2

When troubleshooting a pulse oximeter that is giving an erratic SpO2 reading, the CBET should understand that the device's measurement principle is based on the absorption of light by what substance in the blood?

Accepted Answer

Hemoglobin

Answer

Pulse oximeters work by passing red and infrared light through a capillary bed and measuring the differential absorption. The amount of light absorbed is dependent on the oxygenation level of hemoglobin, the protein in red blood cells that carries oxygen.

Question 3

Which of the following correctly traces the primary path of electrical conduction in the heart, which is fundamental to understanding ECG arrhythmias?

Accepted Answer

SA Node -> AV Node -> Bundle of His -> Purkinje Fibers

Answer

The normal electrical impulse in the heart originates in the Sinoatrial (SA) node, travels to the Atrioventricular (AV) node, then moves down the Bundle of His, and finally spreads through the ventricles via the Purkinje fibers, causing contraction. Understanding this pathway is crucial for interpreting ECGs.

Question 4

A ventilator is a life-support device that assists with the primary physiological function of which organ system?

Accepted Answer

Respiratory system

Answer

Ventilators are mechanical breathing devices that support the respiratory system. Their main function is to move breathable air into and out of the lungs, assisting patients who are physically unable to breathe or are breathing insufficiently.

Question 5

A biomedical technician is servicing a capnography monitor. This device measures the concentration of carbon dioxide (CO2) in a patient's exhaled breath, which provides critical information about:

Accepted Answer

Ventilation and metabolic status

Answer

Capnography directly measures end-tidal CO2 (EtCO2), which reflects the adequacy of ventilation (air movement in the lungs) and the body's metabolic state. It is a critical parameter for monitoring patients under anesthesia or in intensive care.

CBET - Certified Biomedical Equipment Technician Practice Test

CBET - Certified Biomedical Equipment Technician Practice Test

CBET - Certified Biomedical Equipment Technician Anatomy and Physiology Basics Questions and Answers