41. Forgetting is part of the homeostasis of the brain. 42. Maintaining homeostasis is a crucial function of the brain. 43. The reabsorption of bone by osteoclasts also plays a role in calcium homeostasis . 44. The diencephalon performs functions associated with hormones and homeostasis . 45. The receptor helps maintain iron homeostasis in the cells by controlling iron concentrations. 46. Homeostasis is the set point, or carrying capacity, defined as K.47. Magnesium homeostasis comprises three systems : kidney, small intestine, and bone. 48. It is proposed that drugs such as proguanil act to disrupt retinoid homeostasis . 49. Another suggested function is aiding the activation homeostasis of synapses and memory consolidation. 50. Ferroportin and hepcidin are critical proteins for the regulation of systemic iron homeostasis .