BIOL 1150 Lecture Notes - Lecture 5: Endoplasmic Reticulum, Nuclear Membrane, Nuclear Pore
Document Summary
Sub-atomic particles > atoms > molecules > biological macromolecules > organelles > cells. Contains almost all of the genetic information of the cell, the dna. It is surrounded by a nuclear envelope, which is a double membrane that allows communication through nuclear pores. An extensive network of channels connected to the plasma membrane, the nuclear envelope, and certain organelles. Consists of a series of interconnected, attened membranous sacs. Cell products are packaged in vesicles and transferred to the golgi complex for processing and packaging. Contain enzymes that break down macromolecules, old organelles, and invaders. Provide cell with energy through the breakdown of glucose to produce atp. Contains inner foldings (cristae) that provide increased membrane surface for cellular respiration. Provides shape and support for the cell. Is composed of microtubules (thickest), intermediate laments, and micro laments (thinnest) Microtubules and micro laments are seen to disassemble and reassemble. Intermediate laments tend to be more permanent.
