What happens to the walls of distal convoluted tubule(DCT) of the nephrons when vasopressin is released by pituitary gland into blood stream?

What is turgor pressure? How is it maintained in plants ? What will happen when wall pressure equals to turgor pressure?

What hormones are secreted by the posterior pituitary gland?What function does each serve?Where are these hormones actually produced ?How are these hormones transported to the region from where they are released?