BIOL130 Study Guide - Final Guide: Keratin, Motility, Tubulin

• School: University of Waterloo
• Department: Biology
• Course: BIOL130
• Professor: Niels C Bols

Document Summary

Extracellular signal molecules = proteins, peptides, amino acids, nucleotides, steroids etc. used for communication within cells. Endocrine signaling: relies on hormones that travel through bloodstream, broadcasted throughout whole body, long-distance signal molecule, paracrine signaling. Local mediators that diffuse locally through extracellular fluid, remains in neighborhood of cell a. b. Cells have millions-thousands of receptors for specific signal molecules. Extracellular signal molecule could cause: cell shape alternation, movement metabolism, gene expression or combination. Signal molecule combinations can cause: survival, growth + division, cell differentiation. Cell with no signals acting on it becomes apoptotic cell. Heart pacemaker cells = decreases rate of firing. Cell"s response to signal can be either fast or slow: Fast: change in movement, conformation, metabolism