Give an example for intercellular communication via intercellular messenger

In low level of thyroid hormone Anterior pituitary secretes TSH ( Thyroid stimulating hormone ). Through blood flow it was sensed by thyroid stimulating hormone receptor on thyrocytes which then secretes tyroxine. Other example : In water deprivation ( plasma osmolality increases ) . Posterior pituitary secretes Antideuretic Hormone (ADH) . Through blood flow it was sense by ADH receptor on kidney cell which then decreases water excretion.