A nurse reviewing the anatomy and physiologic functioning of the heart. The nurse should recognize that which statement best describes the atrial kick?
The atria contract toward the end of diastole and push the remaining blood into the ventricles
Contraction the atria at the beginning of diastole can be felt as a click
The ventricles contract during systole and attempt to push against closed atria
Atrial kick is the pressure exerted against the atria as the ventricles contract during systole
The Correct Answer is A
A) The atria contract toward the end of diastole and push the remaining blood into the ventricles:
This is the correct definition of the atrial kick. The atrial kick refers to the contraction of the atria just before the ventricles contract, which occurs late in diastole. During this phase, the atria contract to push the remaining blood into the ventricles, ensuring that the ventricles are as filled as possible before the next ventricular contraction. This action contributes to about 20–30% of the ventricular filling, especially important in situations where the heart rate is fast, as there may be less time for passive filling during diastole.
B) Contraction of the atria at the beginning of diastole can be felt as a click:
This statement is incorrect. Atria contract at the end of diastole, not the beginning. The atrial contraction is not typically felt as a "click." If there is a "click" sound, it could indicate an abnormal heart valve sound, such as from a mitral valve prolapse, rather than the normal atrial contraction. The atrial kick itself is not associated with any audible click but may be heard as part of the S4 heart sound, especially in conditions with stiff ventricles (such as hypertension or heart failure).
C) The ventricles contract during systole and attempt to push against closed atria:
This is not an accurate description of the atrial kick. During systole, the ventricles contract and push blood into the aorta and pulmonary artery through the open semilunar valves, not against the atria. The atrial kick is a part of diastole, not systole, and involves the atria pushing blood into the ventricles, not the ventricles pushing against the atria.
D) Atrial kick is the pressure exerted against the atria as the ventricles contract during systole:
This description is incorrect. The atrial kick occurs when the atria contract near the end of diastole, not during systole. During systole, the ventricles contract and pump blood out of the heart, but this is not related to the atrial kick. Instead, the atrial kick is the contribution of atrial contraction to the final phase of ventricular filling, just before the ventricles contract.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A) Crackles: Crackles are abnormal lung sounds often associated with conditions such as pneumonia, heart failure, or pulmonary edema. They result from fluid in the airways or alveoli. However, crackles are not typically the primary finding in pleuritis, which involves inflammation of the pleura.
B) Stridor: Stridor is a high-pitched wheezing sound caused by an obstruction or narrowing of the upper airway, often seen in conditions such as croup or anaphylaxis. It is not characteristic of pleuritis, which involves inflammation of the pleura and not airway obstruction.
C) Dyspnea: Dyspnea, or difficulty breathing, is a common symptom in many respiratory conditions, including pleuritis. While pleuritis can lead to discomfort during breathing, dyspnea itself is not a sound that would be auscultated. It’s a subjective feeling that would be noted during the client’s history or verbal report, rather than an auscultatory finding.
D) Friction rub: A pleural friction rub is the most expected finding when auscultating a client with pleuritis. This sound occurs when the inflamed pleural layers rub against each other during breathing, producing a grating, scratchy sound. The nurse will typically hear this sound best on inspiration or expiration and it is the hallmark sign of pleuritis. The presence of a friction rub indicates the pleural inflammation characteristic of this condition.
Correct Answer is A
Explanation
A) A blend of fibrous, glandular, and adipose tissues: The internal structure of the breast is composed of a mixture of fibrous, glandular, and adipose tissues. The glandular tissue is responsible for producing milk, the fibrous tissue provides structural support, and the adipose tissue stores fat. This combination of tissues gives the breast its shape and functional capabilities, making it a complex and dynamic organ.
B) Primarily milk ducts which function as milk reservoirs: While the breast does contain milk ducts that transport milk from the glandular tissue to the nipple, it is not primarily composed of these ducts. The milk ducts are an important component, but they do not make up the majority of the breast's internal structure. The blend of different tissues is what defines the breast’s anatomy.
C) Primarily muscle with small amounts of fibrous tissue: The breast itself does not contain significant muscle tissue. The primary muscles related to the breast are the pectoral muscles, which lie beneath the breast tissue but are not part of the internal breast structure. The internal breast primarily consists of fibrous, glandular, and adipose tissues, not muscle.
D) Glandular tissue to attach the breast to the chest wall: The glandular tissue is crucial for milk production, but it does not function to attach the breast to the chest wall. The attachment of the breast to the chest wall is facilitated by the Cooper's ligaments, which are fibrous bands that help maintain structural integrity. Glandular tissue primarily serves the function of milk production.
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