Written Assignment 2 - Paige Costantino 1 List the general...

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Paige Costantino 1. List the general functions for each of the following: The plasma membrane: A barrier, which separates the inside of cell from extracellular fluid. Controls entry of ions and nutrients. It controls the elimination of wastes and releases secretions. The cytoskeleton : Is the cells skeleton. Provides protein framework to give cytoplasm flexibility and strength. Ribosomes: Responsible for protein synthesis. The more protein a cell synthesis the more ribosomes there are. The Golgi apparatus: Renews and modifies the plasma membrane, modifies and packages secretions for release through exocytosis and packages special enzymes in the vesicle for use in the cystol. Mitochondria: Responsible for energy production The nucleus 2. Describe the structure of a cell and the contents of the nucleus. What is an organelle? The nucleus is usually the largest structure in a cell, under a microscope it is the only organelle that is visible to human eye. The nucleus is a control center for cellular operations. The nucleus consists of the nuclear envelope, which surrounds the nucleus and separates it from cytoplasm; Perinuclear space which separates two layers of nuclear membrane; Nuclear pores which are a passage for chemical communication between nucleus and cytosol; nucleoplasm which is the fluid contents and nucleoli which is a organelle that synthesizes ribosomal RNA. An organelle is what an organ is to a humans body. Organelles are tiny little organs inside of a living cell.
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