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 B
Explanation
A. 116° C (240° F): This temperature is not sufficient for effective sterilization; it is below the standard required.
B. 121° C (250° F): The minimum temperature for proper sterilization in an autoclave is 121° C (250° F), which is required to achieve effective sterilization.
C. 100° C (212° F): This temperature is not sufficient for sterilization, as it only reaches the boiling point of water.
D. 149° C (300° F): This temperature is higher than necessary for standard autoclave sterilization, though it is effective.
Correct Answer is B
Explanation
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B. Sitting on the edge of a chair and leaning forward: This body language conveys attentiveness and engagement, indicating care and interest in the conversation with the patient.
C. Standing across the room. Standing across the room can seem impersonal and distant, which may not effectively communicate care and interest.
D. Standing over the patient: Standing over the patient can be intimidating and may convey dominance rather than care and support.