The ureters are composed of smooth muscle fibers that propel urine to the bladder by what process?
Peristalsis
Mass movement
Segmental contractions
Tetany
The Correct Answer is A
Choice A reason: Peristalsis is the process by which smooth muscle fibers in the walls of the ureters contract rhythmically to propel urine from the kidneys to the bladder. This coordinated movement involves a wave-like series of contractions and relaxations, ensuring that urine is efficiently transported along the ureters, even against gravity. Peristalsis is a crucial mechanism for maintaining the flow of urine and preventing backflow into the kidneys.
Choice B reason: Mass movement refers to strong, coordinated contractions in the colon that move fecal matter toward the rectum. This process is associated with the large intestine and is not involved in the movement of urine through the ureters.
Choice C reason: Segmental contractions are localized contractions in the intestines that help mix and propel intestinal contents. They are not the primary mechanism for moving urine through the ureters.
Choice D reason: Tetany refers to involuntary muscle spasms or contractions, usually caused by low calcium levels or other electrolyte imbalances. It is not a normal physiological process for propelling urine through the ureters.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Increasing red meat in the diet is not an appropriate treatment for hypovolemia due to hemorrhage. While red meat contains iron, which is important for blood production, it does not address the immediate need to replace lost blood volume.
Choice B reason: Infusing D5NS (5% Dextrose in Normal Saline) at 75 ml/hr for 10 hours may help replenish fluid volume, but it does not provide the necessary components to replace lost blood cells and clotting factors. This option is not sufficient for severe hemorrhage.
Choice C reason: Replacement of volume with blood products is the treatment of choice for hypovolemia due to hemorrhage. Blood transfusions provide the necessary red blood cells, plasma, and clotting factors to restore blood volume and improve oxygen delivery to organs. This is crucial in managing severe blood loss and preventing complications such as hypovolemic shock.
Choice D reason: Increasing H2O (water) intake to 400 ml/4 hr for 24 hours is not an appropriate treatment for hypovolemia due to hemorrhage. While hydration is important, it does not address the immediate need to replace lost blood volume and components.
Correct Answer is D
Explanation
Choice A reason: Decreased fluid intake would typically result in lower urine output and higher urine concentration, but it does not directly explain a urine sodium concentration of 10 mmol/L.
Choice B reason: Increased fluid intake would generally lead to higher urine output and lower urine sodium concentration, as the kidneys excrete excess sodium. Therefore, this is not consistent with a urine sodium concentration of 10 mmol/L.
Choice C reason: Insensible loss refers to fluid loss that is not easily measured, such as through sweating or breathing. It does not directly explain the urine sodium concentration.
Choice D reason: Sodium retention is consistent with a low urine sodium concentration of 10 mmol/L in patients with large-volume ascites. In conditions like cirrhosis, the body retains sodium, leading to fluid accumulation in the abdomen (ascites) and lower sodium excretion in the urine.
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