About This Chapter
Cell Biology Overview - Chapter Summary
This chapter will cover cell biology information so that you are well-prepared to recall the topics in these lessons. Review the following topics in this chapter such as:
- Two types of cells
- Organelles in plant and animal cells
- Special functions of different cells
- Stages of mitosis
- Egg and sperm cells
- Ways saturation levels force change
- Types of energy such as active and passive transport
- Importance of nitrogen
- Formula for cellular respiration
- How light is used as energy
- Location of genes
- How genetics works
You have the choice to watch video lessons or read lesson transcripts. This allows you to study in a way that suits your learning style and maximizes your study experience. The video lessons come with a timeline feature so you can skip around to areas you need to focus on. Also, the lesson transcripts have key terms and topics in bold print.
1. What are Cells? - Overview
All living organisms are made up of cells, but do you know what a cell is? In this lesson, you can learn about the three main structures that all cells contain and about the two major types of cells.
2. Organelles in Cells: Definition & Functions
This lesson will focus on the major organelles that are found inside eukaryotic cells. It will discuss their structures and functions. The differences in organelles found in plant and animal cells will also be covered.
3. What Is Cell Differentiation? - Process, Importance & Examples
In this lesson, you will learn how your cells become specialized. This specialization of cells allows them to perform different functions and create different parts of your body.
4. What is Mitosis? - Definition, Stages & Function
Every day your body cells are dividing using a process called mitosis. This allows you to grow and replace damaged or worn out cells. Learn about the stages of mitosis: prophase, metaphase, anaphase and telophase.
5. What is Meiosis? - Steps & Results
It's meiosis that gives us the male and female reproductive cells known as the egg and sperm. In meiosis, two cell divisions take place, which produces four genetically unique cells with half the number of chromosomes as the parent cell.
6. Osmosis, Diffusion and Saturation
The cells in our bodies are in constant flux through the processes of osmosis and diffusion. Learn about how saturation levels force change, and why we're lucky they do.
7. Passive & Active Transport in Cells
In order for your cells to survive, nutrients and other substances must be allowed to move in and out across the cell membrane. Sometimes this requires energy (active transport), and sometimes it does not (passive transport).
8. Nitrogen Fixation: Significance to Plants and Humans
Almost 80% of our atmosphere is nitrogen, but we can't use it. We will look at how this unusable nitrogen is converted into a form we can use and why nitrogen is important to plants and humans.
9. What is Respiration? - Definition, Process & Equation
Respiration is a metabolic process common to all living things. Here, you will learn the definition, location, processes, and formula for cellular respiration. At the end, you can test your knowledge with a short quiz.
10. Photosynthesis: Definition & Reactions
Some people may falsely assume plants to be weaker than animals. However, plants and a few other organisms harness light energy from the sun to feed the rest of us. This lesson will introduce you to how they do it.
11. What Is a Gene? - Definition & Structure
Genes are little codes found in our cells that make up who we are. This lesson covers where genes are located, how we get our genes, and the functions of genes.
12. Genetics: Heredity, Traits & Chromosomes
We view manipulation of genes in our crops and livestock as a recent development. Yet, man has been manipulating the genetic makeup of his food for thousands of years through cultivation and breeding. This lesson will begin to help you understand how genetics works.
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