PSY 2116 Lecture Notes - Lecture 5: Ependyma, Myelin, Kinesin
25 Jan 2013
School
Department
Course
Professor
Document Summary
The soma: roughly spherical central part of the neuron, watery fluid inside the cell (cytosol) is salty, potassium rich and separated from the. Is about 20 m in diameter outside: the cell body of the neuron contains the same organelles that are found in all animal cells. Mitochondria: everything within the cell membrane, excluding the nucleus is collectively known as the cytoplasm, the nucleus. Spherical, centrally located and is contained within a double membrane called nuclear envelope. Contains chromosomes and dna: the rough endoplasmic reticulum. Enclosed stacks of membrane dotted with ribosomes. Major site of protein synthesis in neurons. If the protein is destined to reside within the cytosol of the neuron, then the protein"s mrna moves towards the free ribosome. If the protein is destined to be inserted in a membrane or an organelle, then it is synthesized in the rough er: smooth er and the golgi apparatus. Is actually quite heterogeneous and performs different functions in different locations.
