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. Reaching over the field: Reaching over a sterile field can contaminate it by introducing microorganisms from outside the sterile area.
B. Maintaining a 1-inch border around the edge of the sterile field: Maintaining a 1-inch border is a standard practice to ensure that the edges of the sterile field are not contaminated.
C. Holding all sterile articles at waist level: Holding sterile articles above the waist level is the recommended practice to prevent contamination. Holding them at waist level is considered acceptable as long as the items do not touch non-sterile surfaces.
D. Facing the sterile field: Facing the sterile field while working is part of maintaining sterile technique, as it ensures that you do not accidentally move toward the sterile field and contaminate it.
Correct Answer is C
Explanation
A. Upon scheduling: Copayments are generally not collected when scheduling an appointment but at the time of service.
B. When statements are sent: Copayments are usually collected at the time of the office visit rather than through statements.
C. At the time of service: It is standard practice to collect copayments when the patient arrives for their appointment.
D. Upon insurance verification: Insurance verification occurs before the visit, but copayments are collected during or after the visit.