Provide the full names for the following abbreviations:
$(1)$ $JGA$
$(2)$ $ADH$

(N/A) $(1)$ $JGA$ stands for Juxtaglomerular Apparatus. It is a specialized region formed by cellular modifications in the distal convoluted tubule and the afferent arteriole at the location of their contact.
$(2)$ $ADH$ stands for Antidiuretic Hormone,also known as vasopressin. It is secreted by the posterior pituitary gland and plays a crucial role in water reabsorption in the kidney tubules.