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.
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Related Questions
Correct Answer is D
Explanation
Choice A reason: This statement is partially correct but does not fully address the question about glucose readings. The Dawn Phenomenon involves an increase in blood glucose levels in the early morning due to the release of counter-regulatory hormones (like cortisol and growth hormone) that increase insulin resistance and stimulate glucose release from the liver.
Choice B reason: This statement is true but incomplete. The Dawn Phenomenon is indeed caused by the release of certain hormones, but this option does not specify the timing or the glucose readings.
Choice C reason: While the hyperglycemia associated with the Dawn Phenomenon does typically occur between 4 a.m. and 9 a.m., this option does not fully describe the nature of the glucose readings. It is more important to note that the hyperglycemia is not due to overnight hypoglycemia.
Choice D reason: This statement accurately describes the Dawn Phenomenon. It is characterized by morning hyperglycemia that is not caused by overnight hypoglycemia. Instead, it is due to the body's natural release of counter-regulatory hormones, which increase blood glucose levels during the early morning hours.
Correct Answer is D
Explanation
Choice A reason: Exercise has been shown to decrease the cardiovascular effects of excessive glucose. Regular physical activity helps improve cardiovascular health by reducing blood pressure, improving cholesterol levels, and enhancing blood flow. In individuals with type 2 diabetes, exercise can help lower blood glucose levels and reduce the risk of cardiovascular complications, which are common in diabetes due to chronic high blood glucose levels.
Choice B reason: Skeletal muscles can indeed use glucose without a proportionate insulin amount during exercise. This is because exercise increases insulin sensitivity and allows muscles to take up glucose more efficiently. As a result, physical activity can help lower blood glucose levels and improve overall glucose control in individuals with type 2 diabetes.
Choice C reason: Exercise decreases stress, which is beneficial for individuals with type 2 diabetes. Physical activity helps release endorphins, which are natural stress relievers. Lower stress levels can help improve blood glucose control, as stress hormones like cortisol can raise blood glucose levels. Therefore, reducing stress through exercise can contribute to better diabetes management.
Choice D reason: All of the above reasons are correct. Exercise is encouraged in type 2 diabetes because it provides multiple benefits, including improving cardiovascular health, enhancing glucose uptake by skeletal muscles, and reducing stress levels. These combined effects help improve overall blood glucose control and reduce the risk of complications associated with type 2 diabetes.
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