About This Chapter
How it works:
- Begin your assignment or other GED science work.
- Identify the cell biology concepts that you're stuck on.
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This chapter of our GED science tutoring solution will benefit any student who is trying to learn about cell biology and earn better grades. This resource can help students including those who:
- Struggle with understanding the fluid mosaic model, active cell transport, ribosome structure, cytoskeleton, mitochondria structure, eukaryotic cells, viruses or any other cell biology topic
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- Learn at Your Pace: You can pause and rewatch lessons as often as you'd like, until you master the material.
- Explain how phospholipid bilayers are both hydrophobic and hydrophilic.
- Take a look at the fluid mosaic model of the cell membrane.
- Compare and contrast active and passive transport in cells.
- Learn about endocytosis and exocytosis across the cell membrane.
- Become familiar with the functions of the different cell structures.
- Discuss the similarities and differences between eukaryotic and prokaryotic cells.
- Examine the lytic and lysogenic cycles of bacteriophages.
1. How a Phospholipid Bilayer Is Both Hydrophobic and Hydrophilic
In this lesson, we will learn what gives phospholipids a dual personality. How can this molecule be both hydrophobic and hydrophilic, and why is this important to a cell?
2. The Fluid Mosaic Model of the Cell Membrane
In this lesson, we will discuss the components of the cell membrane and why the fluid mosaic model paints the best picture of its structure. We'll learn about the roles of the phospholipid bilayer, cholesterol, proteins and carbohydrates.
3. Passive Transport in Cells: Simple and Facilitated Diffusion & Osmosis
A cell membrane is selectively permeable - not permeable to everything. In this lesson, we'll talk about methods of passive transport along a concentration gradient, including simple and facilitated diffusion and osmosis.
4. Active Transport in Cells: Definition & Examples
In this lesson, we'll learn how substances are transported across the cell membrane against the concentration gradient. This might seem like an uphill battle for the cell, but all it takes is a little chemical energy and a few integral membrane proteins to kick off some active transport!
5. Endocytosis and Exocytosis Across the Cell Membrane
In this lesson, we'll discover how some cells can eat, drink, and digest their dinner through the process of endocytosis and a structure called the lysosome. In addition, we'll learn how a cell can throw out the leftovers across the cell membrane during exocytosis.
6. Structure of the Nucleus: Nucleolus, Nuclear Membrane, and Nuclear Pores
In this lesson, we'll discuss the organization and importance of the nucleus in your cells. This is the membrane-bound structure responsible for containing all the genetic material essential to making you who you are.
7. The Ribosome: Structure, Function and Location
The ribosome is the cellular structure responsible for decoding your DNA. In this lesson, we'll learn about ribosome structure, function and location - characteristics that make it a very good genetic translator.
8. The Endomembrane System: Functions & Components
In this lesson, we'll learn about the endomembrane system, which consists of the endoplasmic reticulum and the Golgi apparatus. This system is important in making, packaging, and shipping all sorts of goodies for the cell to use!
9. The Cytoskeleton: Microtubules and Microfilaments
In this lesson, we'll learn about the cytoskeleton of your cells. This network of microtubules, intermediate filaments, and microfilaments helps different types of cells maintain a unique set of characteristics, including shape and movement.
10. Mitochondria Structure: Cristae, Matrix and Inner & Outer Membrane
If you want to make it through the day, you're going to need some energy. In this lesson, we'll learn about the organelle that supplies this energy, the mitochondrion, and why this cell structure appreciates the time you took to eat breakfast this morning!
11. Chloroplast Structure: Chlorophyll, Stroma, Thylakoid, and Grana
In this lesson, we'll explore the parts of the chloroplast, such as the thylakoids and stroma, that make a chloroplast the perfect place for conducting photosynthesis in plant cells.
12. Plant Cell Structures: The Cell Wall and Central Vacuole
In this lesson, we'll talk about some of the things that make plant cells so different from our cells. In addition to being mean, green photosynthesizing machines, plant cells have cell walls and central vacuoles to make them unique!
13. Eukaryotic and Prokaryotic Cells: Similarities and Differences
In this lesson, we discuss the similarities and differences between the eukaryotic cells of your body and prokaryotic cells such as bacteria. Eukaryotes organize different functions within specialized membrane-bound compartments called organelles. These structures do not exist in prokaryotes.
14. Viruses: Bacteriophage Lytic and Lysogenic Cycles
Viruses are generally not only our enemy but also the enemy of many other organisms. Bacteriophages are viruses that infect specific bacteria. In this lesson, we'll discuss their basic structure and infection cycle.
15. Eukaryotic Plant Cells: Definition, Examples & Characteristics
Discover the defining characteristics of eukaryotic plant cells and learn about the three primary categories of plant cells: sclerenchyma, collenchyma and parenchyma cells.
16. Facilitated Diffusion: Definition, Process & Examples
This lesson will provide you with a definition of facilitated diffusion. Also, an example and illustration will be provided to support your understanding of the process.
17. Intermolecular Forces in Chemistry: Definition, Types & Examples
This lesson defines the major forces that occur between molecules. Specifically, the lesson explains ion-dipole, dipole-dipole, and London (or dispersion) forces. Several examples are included to provide context.
18. Intracellular Fluid: Definition & Composition
In this lesson you will find the definition of intracellular fluid. In addition, the composition of intracellular fluid and how water moves in and out of the cell will be provided. Finally, the relationship of electrolytes and intracellular fluid will be explained.
19. Nucleosome: Definition & Structure
Each of your cells has about 2 meters of linear DNA. This has to be packed into a nucleus roughly 10 micrometers in diameter. This means your nucleus must be excellent at packaging your genetic material! This lesson tells you how your DNA is packaged.
20. Nucleus: Definition & Function
A nucleus is like the brain of your cells. In this lesson, you will learn about its various responsibilities, and then you can test how well you grasp this material by taking a quiz.
21. Rough ER: Definition, Function & Structure
In this lesson, we will look at the busy workings of the rough ER. Here we will establish its definition, examine its function, and observe its structure. At the end, you can test your knowledge with a short quiz.
22. Semipermeable Membrane: Definition & Overview
Semipermeable membranes are vital parts of biological systems - they're a big part of how the cells of plants and animals work. Learn what a semipermeable membrane is, and how they are used in biological and human-made systems.
23. Thermoreceptors: Definition & Function
Our senses are necessary for detecting changes in the environment. Temperature is an environmental factor that changes frequently, and our bodies have to be able to detect these changes. This article discusses thermoreceptors and their function in detecting temperature.
24. Endocytosis: Definition, Types & Examples
Discover how cells 'eat' and 'drink' without having hands or a mouth! Read about the various ways that cells accomplish this, and take a quiz to test your understanding.
25. Osmotic Pressure: Definition & Formula
This lesson will define osmotic pressure, provide the formula for calculating osmotic pressure, and show you how to solve problems using the formula. After the lesson, there will be a brief quiz so you can test what you've learned.
26. What Is a Cell Body? - Definition, Function & Types
Ever wonder what controls all the cells in your brain? In this lesson, you will learn about the control center for each neuron in your brain, the cell body.
27. What is Cytology? - Definition & History
In this lesson, learn the definition of cytology and meet the scientists responsible for its origins. Discover the importance of advances in cytology, and see how cytology is used in our modern world.
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