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: Reversible deviant cells do not accurately describe neoplasia. Neoplasia involves the uncontrolled and irreversible growth of abnormal cells. While some deviant cell changes can be reversible, neoplasia specifically refers to irreversible changes that lead to tumor formation.
Choice B reason: Neoplasia does not adhere to the genetic controls placed on cellular proliferation and differentiation. In fact, the hallmark of neoplasia is the loss of these regulatory mechanisms, leading to uncontrolled cell growth and differentiation.
Choice C reason: Neoplasia indeed alters cellular proliferation and differentiation. This alteration is due to genetic mutations and other changes that lead to the loss of normal growth control. The result is the formation of tumors, which can be benign or malignant.
Choice D reason: Controlled and regulated cells do not describe neoplasia. Neoplastic cells grow and proliferate without the normal regulatory signals that control cell growth and differentiation. This uncontrolled growth is what characterizes neoplasia.
Correct Answer is C
Explanation
Choice A reason: Breastfed babies typically have unformed (rather than formed) stools that are yellow and seedy, not yellowish-brown. Formula-fed babies tend to have more formed stools that are light brown or tan in color. The stooling frequency is often higher in breastfed babies compared to formula-fed babies.
Choice B reason: This description is incorrect. Formula-fed babies typically have more formed stools that can range from light brown to tan, rather than yellow. Breastfed babies usually have yellow, unformed stools and tend to stool more frequently.
Choice C reason: Breastfed babies have soft, unformed, and yellow stools due to the easy digestibility of breast milk. Formula-fed babies tend to have less frequent stooling patterns and their stools are more formed and light brown in color. This difference is due to the different compositions of breast milk and formula.
Choice D reason: Breastfed babies do not usually have light brown stools; their stools are typically yellow and unformed. Formula-fed babies can have yellow stools in some cases, but more commonly, their stools are light brown or tan and more formed.
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