Question

If nothing else is removed from the filtrate once it reaches the late distal tubules, the urine excreted would have which of the following properties?

1) devoid of ions and large volume
2) high osmolarity and low volume
3) low osmolarity and low volume
4) low osmolarity and large volume
5) high osmolarity and large volume

Answer 1

The urine excreted when nothing is removed from the filtrate at the late distal tubules would have high osmolarity and low volume due to prior reabsorption processes.

Step-by-step explanation:

If nothing is removed from the filtrate once it reaches the late distal tubules (DCT), the resulting urine would be expected to have a high osmolarity and low volume. This outcome is due to the fact that by the time the filtrate has passed through the DCT, most of the water and solutes would have already been reabsorbed, assuming the body is in a state of water conservation. Hormones like aldosterone can increase the reabsorption of ions in the DCT, and antidiuretic hormone (ADH) increases water reabsorption in the collecting ducts, making the urine more concentrated. Therefore, the option that most accurately reflects the properties of the urine under these conditions is (2) high osmolarity and low volume.