Final answer:
During antidiuresis, the flow rate from the collecting ducts is lower than that from the distal tubule due to the increased water absorption driven by antidiuretic hormone (ADH), leading to high water reabsorption and lower urine volume.
Step-by-step explanation:
During antidiuresis, the flow rate coming out of the collecting ducts should be lower compared to the flow rate coming out of the distal tubule. Antidiuresis is a phase where the body is conserving water, therefore more water is reabsorbed from the filtrate. Due to the higher water reabsorption in the collecting ducts, triggered by antidiuretic hormone (ADH), the volume of urine output decreases, leading to a reduced flow rate.
In contrast, with less adhesion on the ascending loop of Henle, the distal tubule will be primarily involved in increased solute secretion. The distal convoluted tubule or DCT recovers a significant amount of water before the urine enters the collecting ducts. After this, water absorption increases in the collecting ducts under the influence of ADH.