BIOL121 Lecture Notes - Lecture 6: Osmoregulation, Osmoreceptor, Pituitary Gland
Document Summary
1. 83 identify and explain the general systems/mechanisms involved in the regulation of homeostasis: two main systems involved- nervous and endocrine, requirements for homeostasis; Sensor: a receptor that is sensitive to a particular environmental change or stimulus. Control centre- receives and processes the info supplied by the receptor. Effector: a cell or organ that responds to the commands of the control centre, activity opposes or enhances original stimulus: stimulus sensor control system effector response. Includes: body temp, blood pressure, blood ph, glucose concentration, oxygen and carbon dioxide level, osmoregulation. 1. 84 defi(cid:374)e (cid:858)feed(cid:271)a(cid:272)k(cid:859); the (cid:271)od(cid:455)(cid:859)s respo(cid:374)se to a sti(cid:373)ulus: specific organs and structures must communicate with each other in response to changes in tepithelia. 2. 11 define the term antigen: antigens are substances that the immune system perceives as being foreign and induces an immune response in the body, especially the production of antibodies which specifically react with the antigens. 2. 13 discuss the non-specific defences with reference to the following:
