Practice Question
The electrical conduction of a single, normal heartbeat is initiated by the:
Answer Choices:
Correct Answer:
Sino-atrial (SA) node.
Rationale:
♦️The SA node is the heart’s natural pacemaker, initiating the electrical impulse that starts each normal heartbeat.
♦️It depolarizes the atria first, producing the P wave and setting the intrinsic rate (typically 60–100 bpm).
♦️The impulse then travels to the AV node, His–Purkinje system, and ventricles to coordinate contraction.
♦️Primary pacemaker dominance of the SA node ensures regular sinus rhythm when healthy.
♦️Damage, ischemia, or drugs that depress SA-node activity can lead to bradyarrhythmias or ectopic pacemakers.
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This question is from Examplify NSG 137 Exam 2 which contains 36 questions.
More Questions from This Exam
While conducting a general, routine screening of the thorax and lungs, the nurse will observe the: Select all that apply.
Answer Choices:
A. Color of the face, lips, chest, and nails.
B. Shape and position of the anterior/posterior thorax.
C. Rate of the apical and radial pulses.
D. Breathing pattern for use of accessory muscles.
A client was recently diagnosed with a heart murmur and is asking the nurse for more information. How should the nurse describe to the client about what a heart murmur is?
Answer Choices:
A. A heart murmur is a high-pitched sound caused by a narrowing of a heart valve
B. A heart murmur is an extra sound heard from blood entering a rigid heart chamber
C. A heart murmur is a sound generated by inflammation around the heart muscle
D. A heart murmur indicates turbulent blood flow through a valve in the heart that may indicate narrowing or defects
A decrease of oxygen levels in the body, caused by the deflation of the alveoli in the lungs, is known as
Answer Choices:
A. Pleuritis
B. Phlebitis.
C. Pneumothorax.
D. Atelectasis.
The nurse is completing an assessment of a patient's lungs in the emergency department. Upon auscultation, the nurse observes a continuous, low-pitched, rattling sound in the larger airways. The nurse recognizes this sound as being what adventitious breath sound?
Answer Choices:
A. Wheezing
B. Stridor
C. Rhonchi
D. Crackles
A nurse documents that a client has a normal pupillary light reflex. The nurse should recognize that this reflex indicates which of the following?
Answer Choices:
A. Dilation of both pupils will occur when focusing on an object close by
B. Dilation of both pupils occurs in response to bright light
C. Constriction of both pupils will occur when focusing on an object far away
D. Constriction of both pupils occurs in response to bright light
Question Details
- Category: RN Nursing Exam(s)
- Subcategory: Examplify Exam(s)
- Domain: Health Assessment
- Answer Choices: 4