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# Cell Structure and Function **Module 2: Medical Assistant Study Guide (Test: 2/7/25)** This document is a study guide outlining the structures and functions of a cell. **Cell Structures and their Functions:** * **Plasma Membrane:** A permeable membrane surrounding the entire cell, essential...

# Cell Structure and Function **Module 2: Medical Assistant Study Guide (Test: 2/7/25)** This document is a study guide outlining the structures and functions of a cell. **Cell Structures and their Functions:** * **Plasma Membrane:** A permeable membrane surrounding the entire cell, essential for life. It controls what enters and leaves the cell. * **Cytoplasm:** Gel-like fluid filling the cell, containing metabolic waste products, electrolytes, and nutrients. It houses various cell structures. * **Nucleus:** The control center of the cell, containing DNA. It is located at the center of the cell. * **Nuclear Membrane:** A double-layered porous membrane surrounding the nucleus, protecting it. * **Nucleolus:** A dark body within the nucleus, where RNA (ribosomes) are formed. * **Mitochondria:** Rod-shaped bodies filled with fluid. They convert nutrients into energy for the cell's use. Also called the "power plant" of the cell. * **Ribosomes:** RNA components found in the nucleolus. They are involved in protein synthesis for internal and external use by the cell. * **Cilia:** Short microtubules that move substances across the surface of the cell.. * **Flagella:** Long microtubules that move the entire cell. * **Endoplasmic Reticulum:** A transport system that connects the cell membrane to the nucleus. It transports materials throughout the cell. **Summary:** The document details the major components of a cell and their respective roles in maintaining the life of the cell.