The Correct Answer is {"dropdown-group-1":"A"}
A. Extraglomerular: These cells, also known as Lacis cells, are located in the triangular space between the afferent and efferent arterioles at the vascular pole. They are a vital component of the juxtaglomerular apparatus (JGA). They communicate with intraglomerular mesangial cells to modulate filtration surface area and rate.
B. Vascular: While these cells are part of the vascular pole, "vascular" is not the specific anatomical name for this subset of mesangial cells. This term is too generic and could refer to any cell within the vessel wall. The JGA specifically contains extraglomerular mesangial cells.
C. Cortical: This term describes the general location within the kidney but does not specify the cell type within the juxtaglomerular apparatus. All components of the JGA are cortical, making this descriptor non-specific for the mesangial cells in question. It lacks the necessary anatomical precision.
D. Peritubular: These cells are associated with the peritubular capillaries surrounding the renal tubules and are involved in erythropoietin production. They are not part of the juxtaglomerular apparatus and do not directly influence the glomerular filtration rate through contraction. Their function is endocrine rather than hemodynamic.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Yes, a urine pH of 5 is normal because it is within the range of 4.6-8.0: The test strip color matches the 5.0 reference block on the provided Hydrion chart. Human urine is typically acidic due to metabolic acid production but can vary widely between 4.6 and 8.0. A value of 5.0 is clinically expected and healthy.
B. No, a urine pH of 9 is abnormal because it exceeds the normal range of 4.6-8.0: While the statement regarding the range is correct, the visual evidence from the strip does not match the dark green or blue colors of pH 9. The strip shows a deep orange-red hue. This color corresponds to a much lower, more acidic value.
C. A urine pH of 6 is within the normal range because the normal pH range is 4.6-8.0: Although a pH of 6 is physiological, the color on the test strip is significantly more red than the 6.0 orange-yellow reference. The strip indicates a more concentrated hydrogen ion content. Therefore, 6.0 is an inaccurate reading of the provided sample.
D. Yes, a urine pH of 7.4 is normal because it falls within the normal range of 7.35-7.45: This choice confuses the tightly regulated pH of systemic arterial blood with the highly variable pH of urine. Urine pH 7.4 is possible but does not match the red-orange strip. Furthermore, the urine range is broader than the blood range.
E. No, a urine pH of 3 is abnormal because it is below the normal pH range of 4.6-8.0: The strip matches the reddish hue of the lower end of the scale, but specifically aligns with the 5.0 block. A pH of 3 is extremely acidic and generally outside human physiological limits. The provided chart indicates 5.0 is the best visual match.
Correct Answer is {"dropdown-group-1":"B"}
Explanation
A. Membranous: This short segment of the male urethra pierces the urogenital diaphragm and contains the external urethral sphincter. It is located between the prostatic and penile sections and is not contained within the penis itself. It represents the least distensible portion of the entire urethral canal.
B. Penile (spongy): This is the longest portion of the male urethra, traversing the corpus spongiosum of the penis to the external orifice. It receives secretions from the bulbourethral glands and intraurethral glands along its course. Its anatomical location within the phallus defines this specific nomenclature.
C. Prostatic: This segment passes directly through the substance of the prostate gland at the base of the bladder. It receives the ejaculatory ducts and prostatic secretions, functioning as a common pathway for urine and semen. It is located superior to the pelvic floor, distal to the penis.
D. Bulbar: This is the proximal, dilated portion of the spongy urethra located within the bulb of the penis at the perineum. While it is continuous with the penile urethra, the term specifically refers to the segment within the root of the penis. It is not the descriptive term for the entire penile segment.
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