Ababy suckling at the breast is one example of positive feedback in the body. when a mother breastfeeds her baby, the suckling is the initial detected by sensory in the skin of the nipple region. these transmit this input to the , which is the hypothalamus. the hypothalamus signals for the release of the hormone oxytocin. this homone is the "output" that is sent to the , the glandular tissue of the breast. the baby feeds and this cycle .
a. stimulus,
b. receptors,
c. control center,
d. effector,
e. repeats as long as needed

Ms. w, a 21-year-old woman, came into a clinic after suffering a deep laceration on her foot while walking barefoot around her yard. the wound was cleaned, sutured, and bandaged, and she was released to return home after receiving tetanus antitoxoid. within 72 hours, the wound area was red and swollen, the suture line was dark in color, and it was accompanied by severe throbbing pain. ms. w had a high fever, her heart felt like it was racing, and she was finding it hard to concentraten even on simple tasks. she returned to the clinic and was immediately taken to the hospital. following lab tests, a diagnosis of acute necrotizing fasciitis was made. discussion questions 1. explain why ms. w. received a tetanus antitoxoid before leaving the hospital. (see chapters 3 and 4, infection and passive immunity.) 2. explain how acute necrotizing fasciitis developed in this case and the pathophysiology involved. (see acute necrotizing fasciitis.) 3. what is the potential outcome for ms. w if antibiotic drugs do not reduce the infection quickly?