QuestionAugust 11, 2025

When the efferent arteriole constricts, __ the glomerular capillary pressure increases urine volume decreases the glomerular filtration rate decreases the back pressure in the Bowman's capsule increases

When the efferent arteriole constricts, __ the glomerular capillary pressure increases urine volume decreases the glomerular filtration rate decreases the back pressure in the Bowman's capsule increases
When the efferent arteriole constricts, __
the glomerular capillary pressure increases
urine volume decreases
the glomerular filtration rate decreases
the back pressure in the Bowman's capsule increases

Solution
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Answer

the glomerular capillary pressure increases Explanation 1. Understand the effect of efferent arteriole constriction Constriction of the efferent arteriole increases resistance to blood flow out of the glomerulus, leading to increased pressure within the glomerular capillaries. 2. Analyze the impact on glomerular filtration rate (GFR) Increased glomerular capillary pressure generally leads to an increase in GFR initially, as more plasma is filtered into Bowman's capsule. 3. Consider urine volume and back pressure With increased GFR, urine volume may initially increase unless compensatory mechanisms adjust. Back pressure in Bowman's capsule typically does not increase directly due to efferent arteriole constriction.

Explanation

1. Understand the effect of efferent arteriole constriction<br /> Constriction of the efferent arteriole increases resistance to blood flow out of the glomerulus, leading to increased pressure within the glomerular capillaries.<br /><br />2. Analyze the impact on glomerular filtration rate (GFR)<br /> Increased glomerular capillary pressure generally leads to an increase in GFR initially, as more plasma is filtered into Bowman's capsule.<br /><br />3. Consider urine volume and back pressure<br /> With increased GFR, urine volume may initially increase unless compensatory mechanisms adjust. Back pressure in Bowman's capsule typically does not increase directly due to efferent arteriole constriction.
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