After traveling through the AV node, an electrical impulse travels to which of the following components of an effective cardiac conduction system?
Bundle branches
Purkinje fibers
SA node
Bundle of His
The Correct Answer is D
A. Bundle branches:
The bundle branches are components of the cardiac conduction system that the electrical impulse reaches after it passes through the Bundle of His. These branches carry the impulse down the interventricular septum towards the Purkinje fibers. The bundle branches do not directly follow the AV node in the sequence of conduction.
B. Purkinje fibers:
Purkinje fibers are the final part of the cardiac conduction system that receives the electrical impulse. These fibers distribute the impulse throughout the ventricles, causing them to contract. However, the impulse must first pass through the Bundle of His and bundle branches before reaching the Purkinje fibers.
C. SA node:
The SA node (sinoatrial node. is the heart's natural pacemaker, where the electrical impulse originates. The impulse travels from the SA node to the AV node before it proceeds to the Bundle of His. Therefore, the SA node is involved earlier in the conduction pathway, not after the AV node.
D. Bundle of His:
After the electrical impulse passes through the AV node, it travels to the Bundle of His. The Bundle of His serves as the pathway for the impulse to move from the atria to the ventricles, making it the correct answer. This structure is critical for ensuring that the impulse is properly conducted to the ventricles to facilitate coordinated contraction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Oocytes: Oocytes are the cells in the ovaries that undergo maturation to become egg cells. While they are involved in the process, they are not the process itself.
B. Ovaries: The ovaries are the female reproductive organs that produce oocytes and secrete hormones. They are the location where oogenesis occurs but not the process of meiosis itself.
C. Ovulation: Ovulation is the release of a mature egg from the ovary into the fallopian tube. It is a stage in the menstrual cycle and follows oogenesis but is not the process of meiosis for egg cell formation.
D. Oogenesis: Oogenesis is the process of meiosis that results in the formation of egg cells (ova. . It involves the division and maturation of oocytes within the ovaries, leading to the production of a mature ovum ready for fertilization.
Correct Answer is D
Explanation
A. 3 to 5 liters: This range is above the normal daily urine output for an average adult and may indicate polyuria, a condition often associated with diabetes or excessive fluid intake.
B. 2 to 4 liters: While 2 liters is within the normal range, 4 liters exceeds it, suggesting an unusually high urine output, which could be indicative of an underlying health condition.
C. 5 to 7 liters: This range is significantly higher than the average urine output and is typically seen in cases of severe polyuria, which could result from conditions like uncontrolled diabetes mellitus or excessive fluid intake.
D. 1 to 2 liters: This range correctly identifies the average daily urine output for a healthy adult. Normal urine production varies depending on fluid intake, but generally, adults produce about 1 to 2 liters of urine per day. This range reflects the body's ability to regulate fluid balance efficiently.
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