Question

the juxtaglomerular apparatus is the point at which the _ comes into contact with the _.
proximal convoluted tubule; glomerulus
distal convoluted tubule; afferent arteriole
efferent arteriole; distal convoluted tubule
bowmans capsule; loop of henle
question 14
which of the following would decrease glomerular filtration rate?
vasodilation of the efferent arteriole

Explanation:

• The juxtaglomerular apparatus is formed where the distal convoluted tubule comes into contact with the afferent arteriole.
• Vasodilation of the efferent arteriole would decrease glomerular filtration rate. When the efferent arteriole dilates, more blood flows out of the glomerulus through the efferent arteriole, reducing the glomerular capillary hydrostatic pressure. Since glomerular filtration rate (GFR) is directly related to glomerular capillary hydrostatic pressure (other factors like oncotic pressure and capsular hydrostatic pressure being relatively constant in normal conditions), a decrease in glomerular capillary hydrostatic pressure leads to a decrease in GFR.

Answer:

For the first question: B. Distal convoluted tubule; afferent arteriole
For the second question: A. Vasodilation of the efferent arteriole