Physiology 2130 Lecture Notes - Lecture 1: Positive Feedback, Homeostasis, Ovulation
6 Oct 2016
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Document Summary
Anatomy: the study of the structure of bodily components. Homeostasis: the ability to maintain an internal environment so that cells can function regardless of what is happening in the external environment: maintained through negative and positive feedback mechanisms. Negative feedback: a controlled variable eventually shuts off its own product. Includes: a set point, control centre (also known as an integrator, an effector, a controlled variable, a sensor (also known as a receptor) Effector: furnace (which reacts to a drop in temperature) The sensors are thermoreceptors in the nervous system. The effectors are blood vessels and shivering in muscles. The controlled variable is heat and body temperature. The generation of action potentials in nerve cells. Two main control systems: nervous system (brain, spinal cord, nerves) Acts through a complex system of nerves: endocrine system. Acts through hormones that move through the blood. Tissues: sets of highly specialized cells that are grouped together: ex.
