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- Explain how a phospholipid bilayer can be both hydrophobic and hydrophilic.
- Describe the fluid mosaic model of the cell membrane.
- Learn about active and passive transport in cells.
- Take a look at endocytosis and exocytosis across the cell membrane.
- Describe the layers, function and structure of human skin.
- Describe the functions, types and structure of epithelial tissue.
- Learn directional anatomical terminology.
- Become familiar with the planes of the human body.
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. Multicellular Organisms, Tissues and Epithelium
In this lesson on multicellular organisms, you'll take a look at what it actually means to be multicellular and how cells are organized into tissues, organs, and organ systems. This lesson also covers one of the four main tissue types: epithelial tissue.
7. Human Skin: Layers, Function & Structure
This lesson will cover the three main layers of your skin, which includes the epidermis, dermis, and subcutis. In addition, we'll learn about other skin cells and tissue, such as adipose tissue, keratinocytes, melanocytes, and Merkel's cells.
8. What Is Epithelial Tissue? - Function, Types & Structure
This lesson will cover the different shapes and structures of epithelial tissue, including simple, columnar, cuboidal, stratified, transitional, squamous, and pseudostratified columnar epithelium.
9. Anatomical Directional Terminology: Anterior, Posterior and More
Find out how to properly refer to the location of things at the front and back of a person as well as above or below a certain point on the body by learning the terms anterior, posterior, superior, and inferior.
10. Anatomical Directional Terminology: Limbs, Hands & Feet
In this lesson, you'll learn how we term the different sides of our feet and hands thanks to words like dorsal, plantar and palmar. You'll also learn how we name something that is near or far away from the trunk of our body thanks to words like proximal and distal.
11. Anatomical Directional Terminology: Lateral, Medial & More
Learn what it means to be on the same side as something else or on a different side altogether. In addition, find out what it means to be closer to or farther away from the middle of something as we explore the following terms: lateral, medial, ipsilateral, and contralateral.
12. Planes of the Human Body: Definition, Anatomy & Diagram
Learn about the different ways in which your body can be divided or cut up for theoretical and practical purposes as we explore the sagittal plane, transverse plane and coronal plane.
13. Basement Membrane: Function, Definition & Structure
Basement membranes attach layers of tissues in the body. Learn how the basement membrane helps our skin counteract the effects of gravity and explore its various other functions in this lesson.
14. Epithelial Layer: Definition & Explanation
Epithelial tissue is a diverse anatomical feature crucial in all body processes. Explore the major characteristics of epithelia and the primary functions of this layer.
15. Golgi Apparatus: Definition & Function
Eukaryotic cells contain many organelles to carry out their life functions. One of these important organelles is known as the Golgi apparatus. In this lesson, we'll learn about the structure and function of this organelle.
16. Mechanoreceptors: Definition & Function
How does the nervous system detect touch and communicate touch signals to the brain? Learn how mechanoreceptors function, the different types of mechanoreceptors, and what each type does.
17. Mesophyll Cells: Function & Definition
In this lesson, we'll be looking at mesophyll, a type of cell found in plants. We will look into what mesophyll cells are and also discover how they function.
18. What are Sinuses? - Anatomy & Types
Sinuses are usually only noticed when they are infected. However, they have some great value. They even help us to hold our heads up high. In this lesson, you will learn about what sinuses are, what they do, and the different infections related to them.
19. Metaplasia: Definition, Symptoms & Examples
In this lesson, learn how cell tissue can transform from one shape to another under certain conditions, called metaplasia. Learn where this might occur, for what reasons, and some signs and symptoms people may experience as a result.
20. Types of Epithelial Tissue Diseases
There are several types of epithelial tissues in the human body. These tissues are subject to a number of diseases, and we'll explore a few examples here in this lesson. Epithelial tissue diseases tend to strike the skin, the intestinal tract, and other absorbent areas of the body.
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