BIOL 1107 Study Guide - Midterm Guide: Glycogen, Starch, Ascending Limb Of Loop Of Henle
Document Summary
Introduction to animal structure: a tissue is a group of cells that function as a unit, the hierarchy of structural organization is: Organism: correlations between structure and function occur at the level of the cell. The cells fit closely together in tissues, providing a smooth, low-friction surface over which fluids can move easily. Neurons transmit electrical signals and are made up of a highly branched dendrite and a relatively long axon: osteocytes obtain their necessary nutrients and gaseous exchange from blood vessels that are threaded through channels in the extracellular matrix. These channels are called haversian canals that communicate with small canaliculi which then communicate with the osteocytes themselves. The temperature outside controls their internal temperature, which affects their metabolic rate. For example, body temperature, blood pressure, and oxygen production are all regulated by negative feedback: positive feedback is a physiological mechanism in which a change in some variable stimulates a response that increases the change.
