2) explain what a target cell/tissue/organ is with respect to the endocrine system.

In endocrinology, a target cell /tissue/organ is the one which is meant to be affected by a hormone produced by another cell of an endocrine organ. For example, TSH (thyroid stimulating hormone) secreted by pituitary gland effects the thyroid gland.Here, thyroid cells are target cells.

Explanation:

         a) Growth hormone, secreted by anterior pituitary controls growth.

          b)Oxytocin secreted by posterior pituitary stimulates uterine muscle contraction and release of milk through mammary glands.

         c) Thyroxine secreted by thyroid gland effects all tissue and increases metabolic rate, regulates growth and development.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.