Estrella Mountain Community College
Online Biology Book: Cells: Origins
Through full-color images and concise information, learn about the origin of cells. Discover some of the notable studies surrounding the history of life on Earth.
Sumanas
Sumanas Inc: Discover Biology: Vesicle Budding and Fusing
Tutorial with animated illustrations showing how vesicles work to transport materials inside a cell and release them through the cell's membrane to the outside.
ClassFlow
Class Flow: Cell Presentation
[Free Registration/Login Required] This Flipchart will go over the basic parts of a cell.
BiologyWise
Biology Wise: What Is Facilitated Diffusion?
Explains the process of facilitated diffusion which allows selective movement of materials across the cellular membrane.
Other
Biology Mad: Getting in and Out of Cells [Pdf]
This seven-page Biology course handout gives a detailed explanation, accompanied by many illustrations, of the various processes by which substances travel across the membranes of cells.
University of Arizona
Prokaryotes, Eukaryotes, & Viruses
This tutorial compares prokaryotic and eukaryotic cellular organization and contrasts cells with viruses. Includes a practice quiz to test your knowledge.
CK-12 Foundation
Ck 12: Phospholipid Bilayers
[Free Registration/Login may be required to access all resource tools.] Tutorial describes the detailed structure and function of the plasma membrane, explains semipermeability, and summarizes the structure of a phospholipid.
Khan Academy
Khan Academy: The Endomembrane System
Article looks at the structure and function of the different parts of the endomembrane system, how proteins, lipids, and vesicles are transported between these parts, and how this activity keeps the cell running smoothly.
CK-12 Foundation
Ck 12: Biology: Prokaryote Structure
[Free Registration/Login may be required to access all resource tools.] Covers the common shapes and features of prokaryotic cells.
BiologyWise
Biology Wise: How to Make a Cell Lysis Solution
A cell lysis solution is used to disrupt cellular membranes. This resource provides a detailed explanation of how to make a cell lysis solution and describes the different ingredients, their functions, and the choices available, all...
Other
Miami University: Cellular Nature of Life?
Basic information about cells in an outline form. Gives good information in an abbreviated format.
BiologyWise
Biology Wise: The Major Functions of Lysosomes
Explains what lysosomes are, the different functions they perform in a cell, and what can happen when they become dysfunctional.
CK-12 Foundation
Ck 12: Life Science: Passive Transport
[Free Registration/Login may be required to access all resource tools.] The cell membrane is semi-permeable. Sometimes molecules need the help of special transport proteins or an input of energy to help them move across it. When an input...
McGraw Hill
Glencoe Biology: Cellular Transport: Self Check Quiz
Answer five multiple-choice quiz questions about the different types of cellular transport.
BiologyWise
Biology Wise: Nuclear Membrane Function
Describes the structure and functions of the membrane surrounding a cell nucleus.
CK-12 Foundation
Ck 12: Life Science: Cell Nucleus
[Free Registration/Login may be required to access all resource tools.] The nucleus is only found in eukaryotic cells. It contains most of the genetic material of the cell. It is surrounded by a double membrane, or nuclear envelope, that...
BiologyWise
Biology Wise: The Structure and Functions of a Cell Nucleus
The parts of a cell nucleus are described along with a list of the functions of a cell nucleus.
BiologyWise
Biology Wise: The Characteristics and Uses of Isotonic Solution
Discusses the importance of isotonicity to cell survival and some different uses of isotonic solutions, particularly in medicine.
CK-12 Foundation
Ck 12: Life Science: Archaea
[Free Registration/Login may be required to access all resource tools.] For many years, archaea were classified as bacteria. Like the bacteria, archaea lacked a nucleus and membrane-bound organelles and, therefore, were prokaryotic...
CK-12 Foundation
Ck 12: Life Science: Diffusion
[Free Registration/Login may be required to access all resource tools.] The process of molecules moving from an area where there are lots of molecules to an area where there are fewer molecules is known as diffusion. The diffusion of...
Khan Academy
Khan Academy: Osmosis and Tonicity
Provides an overview of osmosis and tonicity and looks at how osmosis works, as well as the role it plays in the water balance of cells. Describes hypertonic, isotonic, and hypotonic solutions and their effect on cells.
CK-12 Foundation
Ck 12: Life Science: Protist Characteristics
[Free Registration/Login may be required to access all resource tools.] Protists are eukaryotes, which means their cells have a nucleus and other membrane-bound organelles. Most protists are single-celled. Other than these features, they...
Wikimedia
Wikipedia: Cytoplasm
Wikipedia offers brief but accurate information on cytoplasm, the matter contained within the plasma membrane of a cell.
Wikimedia
Wikipedia: Exocytosis
This site from the Wikipedia Encyclopedia describes the process of exocytosis and what is accomplished by the process. Throughout this brief article, links are provided for additional information on the subject.