A nurse is reviewing the sequence of the cardiac cycle. The nurse recognizes that the electrical stimulus of the cardiac cycle follows which sequence?

AV node-• SA node-• bundle of His -• Erb's Point

Bundle of His -• AV node -• SA node -• Erb's Point

AV node -• SA node -• bundle of His -• bundle branches

SA node -• AV node -• bundle of His -• bundle branches

Answer and Explanation

The Correct Answer is D

A) AV node → SA node → bundle of His → Erb's Point:
This sequence is incorrect because the electrical impulse of the heart starts at the SA (sinoatrial) node, not the AV (atrioventricular) node. The SA node is the natural pacemaker of the heart, initiating the electrical signal. The correct order of conduction is SA node → AV node → bundle of His → bundle branches, and finally, the Purkinje fibers. Erb's Point is an anatomical reference point for auscultation, not part of the electrical conduction pathway.

B) Bundle of His → AV node → SA node → Erb's Point:
This sequence is also incorrect. The electrical impulse originates at the SA node, not the bundle of His. The SA node stimulates the AV node, which in turn sends the signal to the bundle of His and then to the bundle branches. This pathway is essential for coordinating the contraction of the heart muscle, starting from the atria and moving to the ventricles.

C) AV node → SA node → bundle of His → bundle branches:
This sequence is reversed and incorrect. The impulse starts at the SA node, not the AV node. The SA node fires first, sending the electrical signal to the AV node, and then the signal travels down the bundle of His, into the left and right bundle branches, and finally to the Purkinje fibers.

D) SA node → AV node → bundle of His → bundle branches:
This is the correct sequence of the electrical conduction pathway of the heart. The electrical impulse originates at the SA node (the heart's natural pacemaker), then travels to the AV node, where it is delayed to allow the atria to contract and fill the ventricles. From there, the impulse moves down the bundle of His, which splits into the left and right bundle branches, leading to the Purkinje fibers that transmit the impulse throughout the ventricles, causing them to contract. This sequence ensures proper coordination and timing of the heart's contractions.

Nursing Test Bank

Quiz #1: RN Exams Pharmacology Exams Quiz #2: RN Exams Medical-Surgical Exams Quiz #3: RN Exams Fundamentals Exams Quiz #4: RN Exams Maternal-Newborn Exams Quiz #5: RN Exams Anatomy and Physiology Exams Quiz #6: RN Exams Obstetrics and Pediatrics Exams Quiz #7: RN Exams Fluid and Electrolytes Exams Quiz #8: RN Exams Community Health Exams Quiz #9: RN Exams Promoting Health across the lifespan Exams Quiz #10: RN Exams Multidimensional care Exams

Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Quiz #1: Naxlex RN Comprehensive online practice 2019 B with NGN Quiz #2: Naxlex RN Comprehensive Predictor 2023 Quiz #3: Naxlex RN Comprehensive Predictor 2023 Exit Exam A Quiz #4: Naxlex HESI Exit LPN Exam Quiz #5: Naxlex PN Comprehensive Predictor PN 2020 Quiz #6: Naxlex VATI PN Comprehensive Predictor 2020 Quiz #8: Naxlex PN Comprehensive Predictor 2023 - Exam 1 Quiz #10: Naxlex HESI PN Exit exam Quiz #11: Naxlex HESI PN EXIT Exam 2

Free Nursing Study Resources

Correct Answer is D

Explanation

A) Tactile fremitus:
Tactile fremitus refers to the vibrations felt on the chest wall when a patient speaks. It is assessed by placing the hands on the chest while the patient says "ninety-nine" or a similar phrase. Tactile fremitus is used to detect changes in lung density, such as consolidation or fluid. It does not describe a crackling sensation on the skin surface. A coarse, crackling sensation is more indicative of a different condition.

B) Adventitious sounds:
Adventitious sounds are abnormal lung sounds, such as crackles, wheezes, or rhonchi, heard during auscultation. These sounds are typically related to lung conditions, such as pneumonia, asthma, or fluid accumulation in the lungs. While adventitious sounds are significant findings during auscultation, they do not describe the physical sensation of crackling felt on the skin surface. Therefore, adventitious sounds are not the correct diagnosis for a tactile sensation over the chest.

C) Friction rub:
A friction rub is a harsh, grating sound heard during auscultation and is caused by inflammation of the pleura (the lining around the lungs). It occurs when the inflamed pleural surfaces rub together during breathing. While it is a distinct sound, a friction rub is not a tactile or palpable sensation. The crackling sensation described in the question is not related to the sounds produced by a pleural friction rub.

D) Crepitus:
Crepitus is the correct answer. It refers to a coarse, crackling sensation felt on the skin surface when air or gas is trapped under the skin, often due to conditions such as subcutaneous emphysema. This can occur when there is air leaking from the lungs or other parts of the respiratory system, often following trauma (e.g., rib fractures or surgery) or infection (e.g., gas gangrene). The crackling sensation felt during palpation of the chest wall is characteristic of crepitus, making this the most appropriate finding in this scenario.

A. The pupils constrict when the examiner's index finger slowly moves toward the client's nose B. The client's peripheral vision becomes sharper the examiner shines a light over the pupils C. The pupils dilate when the examiner's finger slowly moves toward the client's nose D. The client involuntary blinks in the of bright light directed the pupils during the eye exam

Correct Answer is A

Explanation

A) The pupils constrict when the examiner's index finger slowly moves toward the client's nose: This is the correct description of the process of visual accommodation. Visual accommodation refers to the ability of the eyes to focus on a near object. When the examiner's finger is moved toward the client's nose, the pupils should constrict to focus the light on the retina. This response is an indicator that the client’s eyes are properly adjusting to focus on a close object.

B) The client's peripheral vision becomes sharper when the examiner shines a light over the pupils: This is not correct, as shining a light over the pupils is related to assessing the pupillary light reflex, not visual accommodation. Visual accommodation focuses on the ability to focus on a near object, while peripheral vision is related to the ability to see objects outside of the central vision, and is not influenced by the light shining directly into the pupil.

C) The pupils dilate when the examiner's finger slowly moves toward the client's nose: This is incorrect. When assessing visual accommodation, the pupils should constrict (become smaller) as the object moves closer to the face, not dilate. Dilation of the pupils would suggest a lack of accommodation and could indicate a neurological or eye condition.

D) The client involuntarily blinks in the presence of bright light directed at the pupils during the eye exam: This describes the corneal reflex, which is a response to bright light or a foreign object approaching the eye, rather than a test of visual accommodation. This reflex is mediated by the trigeminal nerve and is unrelated to the accommodation response, which focuses on the pupil's reaction to near objects.

View Question and Answer

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

A nurse is reviewing the sequence of the cardiac cycle. The nurse recognizes that the electrical stimulus of the cardiac cycle follows which sequence?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is palpating a client's anterior chest wall and notices a course, crackling sensation over the skin surface. Which of the following should the nurse suspect from these findings?

Correct Answer is D

Explanation

A nurse is testing a client's visual accommodation. Which of the following should the nurse recognize as an assessment finding from visual accommodation?

Correct Answer is A

Explanation

A nurse is documenting assessment findings on a client. Which of the following entries should the nurse identify as subjective data? (Select All that Apply.)

A nurse reviewing the anatomy and physiologic functioning of the heart. The nurse should recognize that which statement best describes the atrial kick?

A client diagnosed with pleuritis has been admitted to the hospital and complains of pain with breathing. Which of the following assessment findings should the nurse expect when auscultating a client with pleuritis?

A nurse is examining a male client within normal weight range who is questioning about the cause of his enlarged breasts. Which course of action best describes how the nurse should address the client's bilateral gynecomastia?

A nurse is assessing the symmetry of a client's chest. The nurse should understand that which technique best confirms symmetric expansion of the chest?

A nurse is assessing a client for tactile fremitus. The nurse should recognize that it is normal to feel tactile fremitus most intensely over which location?

A nurse is assessing the anterior chest of a client. The nurse recognizes that which of the following should be included in the assessment? (Select all that apply.)

A nurse is teaching a client about internal structures of the breast. The should understand that the internal breast consists what structures?