PSL201Y1 Lecture : Lecture 1.docx
Document Summary
Atoms are the basic building blocks of matter, elements consist of only one kind of atom atom cannot be decomposed into simpler substances all matter is composed of elements most occur naturally. Connective tissue most diverse of the 4 tissues, characterized by extracellular matrix connecting tissue anchors and links structures of the body ex: bone, tendons, fat and blood cells. Mechanisms of exchange across gastrointestional tract which includes secretion and absorption. Exchange of fluid across kidneys in the process of filtration, reabsorption and secretion. Ecf has 2 sub compartments includes plasma and interstitial fluid plasma is the fluid portion of blood and isf is the fluid in between the cells throughout the body. If regulated variable like temperature or blood glucose increases the system responds by making it decrease if these variables decrease, then the system responds by making it increase systems behaving in this manner are called negative feedback.
