CABT Anatomy and Physiology Fundamentals 2

Question 1

Which layer of the heart wall is responsible for the contractile function of the heart?

Accepted Answer

Myocardium

Answer

The myocardium is the thick muscular middle layer of the heart wall that performs contraction to pump blood.

Question 2

What is the primary function of the nephron in the kidney?

Accepted Answer

Blood filtration and urine formation

Answer

The nephron is the functional unit of the kidney, filtering blood and forming urine through filtration, reabsorption, and secretion.

Question 3

In the context of biomedical equipment used during surgery, which nerve plexus supplies the brachial region and is a landmark for regional anesthesia?

Accepted Answer

Brachial plexus

Answer

The brachial plexus (C5–T1) innervates the upper extremity and is the target for brachial plexus nerve blocks used in upper limb surgeries.

Question 4

Which of the following best describes the role of surfactant in the lungs?

Accepted Answer

Reduces surface tension to prevent alveolar collapse

Answer

Surfactant, produced by type II pneumocytes, reduces surface tension in alveoli, preventing collapse during exhalation.

Question 5

A patient's ECG shows a prolonged PR interval. Which anatomical structure is most likely causing the conduction delay?

Accepted Answer

Atrioventricular (AV) node

Answer

The PR interval represents the time for electrical impulses to travel from the SA node through the AV node; a prolonged PR indicates AV node delay.

(CABT) Certified Associate in Biomedical Technology Practice Test

(CABT) Certified Associate in Biomedical Technology Practice Test

CABT Anatomy and Physiology Fundamentals 2