In the conduction system of the heart, which of the following components is stimulated after the sinoatrial node?
Left bundle branch
Purkinje fibers
Right bundle branch
Atrioventricular node
The Correct Answer is D
A. Left bundle branch: The left bundle branch is stimulated after the atrioventricular node and bundle of His, not immediately after the sinoatrial node.
B. Purkinje fibers: The Purkinje fibers are stimulated later in the conduction pathway, after the bundle branches.
C. Right bundle branch: The right bundle branch is also stimulated after the atrioventricular node and bundle of His.
D. Atrioventricular node: After the sinoatrial node initiates the heartbeat, the electrical impulse travels to the atrioventricular node, which then passes the signal to the bundle of His and down to the bundle branches.
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Correct Answer is A
Explanation
A. To ensure accuracy of test results: Quality control ensures that the test results are accurate and reliable, which is crucial for proper diagnosis and treatment.
B. To determine if a test is CLIA-waived: Quality control does not determine CLIA-waived status; it ensures the accuracy and reliability of tests.
C. To enhance instrument productivity: While quality control can indirectly impact productivity by ensuring correct results, it is primarily focused on accuracy and reliability.
D. To monitor the use of instrumentation: Quality control is more focused on test accuracy rather than monitoring the use of instrumentation.
Correct Answer is D
Explanation
A. Orthopedic: Orthopedic specialists focus on musculoskeletal issues such as bones and joints, not coronary artery disease.
B. Neurology: Neurologists treat neurological disorders affecting the brain and nervous system, not coronary artery disease.
C. Bariatric: Bariatric specialists focus on weight loss and obesity-related conditions, which are not the primary treatment focus for coronary artery disease.
D. Cardiology: Cardiologists specialize in heart conditions, including coronary artery disease, and are the appropriate specialists for managing and treating this condition.