BSC 2010C Chapter Notes - Chapter 6: Connexin, Dynein, Amoeboid Movement
Document Summary
Cell = smallest functional unit of life; cell theory states that all organisms are composed of cells & all existing cells arose from pre-existing cells. Characteristics/functions of cells: contents surrounded by plasma membrane, cytoplasm consists of semifluid matrix, organelles embedded in cytoplasm, contain genes in form of dna, highly structured, relationship between structure and function, carries out metabolism. Two types of cells: prokaryotic & eukaryotic. Cytoplasm surrounded by plasma membrane & cell wall. Complex internal structure w/ membranous & non-membranous organelles: membranous nucleus, er, golgi, mitochondria, lysosomes, peroxisomes, non-membranous ribosomes, microtubules, centrioles, flagella, cytoskeleton. Animals have cell membrane, plants have cell wall. Four functional groups manufacture, breakdown, energy processing, and support/movement/communication. Surrounded by double membrane (dna has to be highly guarded) Dna normally present in nucleus as strands of chromatin; during cell division, the chromatin coils up into chromosomes. Nucleolus = organelle within nucleus, responsible for rna synthesis.