BIOL 101 Lecture Notes - Lecture 10: Thermodynamic Cycle, Ground Substance, Skeletal Muscle
Document Summary
Anatomy: the body"s internal and external structure, the physical relationships between the body"s constituent parts. Physiology: the study of how these parts work. Positive feedback: encourages a physiological process or amplifies the action of a system. It"s a cyclic process that can continue to amplify your body"s response to a stimulus until a negative feedback response takes over. Negative feedback: process in which the elements that bring about a response have their activity reduced by that response. Body must maintain homeostasis: the maintenance within the body of a relatively stable internal environment. Humans have two primary body cavities: dorsal cavity. Also divided into cranial and spinal cavities, in where our brains and spine fit: ventral cavity. Includes a thoracic (chest) portion containing the lungs and heart, as well as the lower abdomen (abdominopelvic) containing the organs. Muscular sheet called the diaphragm separates the thoracic and abdominopelvic.
