Question
number 10
A. Glomerular filtration, tubular reabsorption and secretion B. Tubular reabsorption and secretion, Glomerular filtration C. Sodium reabsorption, water reabsorption D Glucose reabsorption, sodium reabsorption Which one of the following two nephron types is critical in the establishment of the medullary osmotic gradient? A. Cortical nephrons B. Juxtamedullary nephrons Under normal circumstances which of the following is the primary mechanism for water loss by the body? A. Water lost via respiratory action B. Water lost via feces C. Water lost via urine D. Water lost via sweat When arterial blood pressure declines below normal, which of the following compensatory changes in renal function occur as a result of sympathetic nervous system activation? A. Afferent arteriolar vasoconstriction B. Afferent arteriolar vasodilation C. Decreased Renin secretion D. Decreased ADH secretion E. None of the above
Explanation / Answer
10 A afferent arteriolar vasoconstriction
Immediate effect of reduced blood pressure is through sympathetic nervous system. It acts by causing
1. Increase in renin secretion from kidneys for more water absorption.
2. Increase vasoconstriction of afferent arteriole.
