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- Explain how phospholipid bilayers are both hydrophobic and hydrophilic.
- Provide examples of active and passive transport in cells.
- Compare and contrast endocytosis and exocytosis across the cell membrane.
- Describe the structure of the nucleus, ribosome, cytoskeleton and mitochondria.
- Explore plant cell structures.
- Discuss the differences and similarities between eukaryotic and prokaryotic cells.
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. Anton Van Leeuwenhoek: Biography, Cell Theory & Discoveries
Anton Van Leeuwenhoek, the 'Father of Microbiology,' so improved the quality of the microscope that some people still think he invented the instrument. In this lesson, we'll learn more about this self-taught scientist, including some of his important discoveries and unique way of presenting his work.
16. Endoplasmic Reticulum: Definition & Functions
Cells are made of numerous organelles that perform specific functions. In this lesson, you will learn about the structure and functions of the endoplasmic reticulum.
17. Intermediate Filaments: Definition, Function & Structure
In this lesson, we'll be looking at intermediate filaments, which make up many of the filamentous substances that bear the brunt of the cell's structure. You'll learn about their function and get a good idea of their structure and then you'll be able to test your knowledge with a quiz!
18. Membrane Potential: Definition, Equation & Calculation
This lesson will define and explain membrane potential: what it is and what makes it. Discover how to calculate membrane potential using an equation, and find out what variables are most commonly used to do so.
19. Natural Killer Cells: Definition & Functions
Discover what makes natural killer cells such an important part of our immune system. Learn about the characteristics of natural killer cells and how they defend against tumors and viruses.
20. Non-Competitive Inhibition: Examples & Graph
This lesson will give a quick review of enzymes and enzyme function. The lesson will then briefly discuss non-competitive inhibition. It will explain how enzyme activity can be graphed with a focus on how the graph changes with non competitive inhibition. The lesson will also give examples of non-competitive inhibition.
21. Tetrad in Meiosis: Definition & Explanation
A tetrad is a special foursome of DNA that is formed during meiosis. Get the scoop on what it is, when it is formed, and why it is necessary in this lesson.
22. Do All Cells Look the Same?
This lesson is on different types of cells in living things. In this lesson we'll discuss the major categories of cells and give examples of how different cells look.
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