If the renal efferent arterioles dilate while the afferent arterioles remain unchanged, the glomerular filtration rate: Question 41Select one:a.decreases due to a decrease in glomerular capillary blood pressureb.decreases due to an increase in glomerular capillary blood pressurec.increases due to a decrease in glomerular capillary blood pressured.increases due to an increase in glomerular capillary blood pressuree.does not change
Question
If the renal efferent arterioles dilate while the afferent arterioles remain unchanged, the glomerular filtration rate: Question 41Select one:a.decreases due to a decrease in glomerular capillary blood pressureb.decreases due to an increase in glomerular capillary blood pressurec.increases due to a decrease in glomerular capillary blood pressured.increases due to an increase in glomerular capillary blood pressuree.does not change
Solution
Para responder a esta pregunta, es importante entender cómo la dilatación de las arteriolas eferentes afecta la tasa de filtración glomerular (TFG).
- Las arteriolas eferentes son los vasos sanguíneos que salen del glomérulo renal.
- Si las arteriolas eferentes se dilatan, esto significa que su diámetro aumenta.
- Un aumento en el diámetro de las arteriolas eferentes reduce la resistencia al flujo sanguíneo que sale del glomérulo.
- Con una menor resistencia, la presión en los capilares glomerulares disminuye.
- La TFG depende en gran medida de la presión en los capilares glomerulares.
- Una disminución en la presión capilar glomerular generalmente resulta en una disminución de la TFG.
Por lo tanto, la respuesta correcta es:
a. disminuye debido a una disminución en la presión sanguínea capilar glomerular.
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