In tubuloglomerular feedback, an increase in glomerular filtration rate would increase the , thereby stimulating the release of a paracrine factor from the macula densa that would . In tubuloglomerular feedback, an increase in glomerular filtration rate would increase the , thereby stimulating the release of a paracrine factor from the macula densa that would . afferent arteriolar pressure : increase filtrate flow afferent arteriolar pressure : constrict the afferent arteriole flow of tubular fluid : constrict the afferent arteriole flow of tubular fluid : constrict the efferent arteriole flow of tubular fluid : dilate the afferent arteriole