About This Chapter
Who's it for?
Anyone who needs help learning or mastering college biology material will benefit from taking this course. There is no faster or easier way to learn college biology. Among those who would benefit are:
- Students who have fallen behind in understanding cell structures and functions
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning science (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about cell biology
- Students who struggle to understand their teachers
- Students who attend schools without extra science learning resources
How it works:
- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the Cell Biology chapter exam.
Why it works:
- Study Efficiently: Skip what you know, review what you don't.
- Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
- Be Ready on Test Day: Use the Cell Biology chapter exam to be prepared.
- Get Extra Support: Ask our subject-matter experts any cell biology question. They're here to help!
- Study With Flexibility: Watch videos on any web-ready device.
Students will review:
In this chapter, you'll learn the answers to questions including:
- What is the fluid mosaic model of the cell membrane?
- What are the characteristics of the phospholipid bilayer?
- How do active and passive cellular transport occur?
- How do the processes of endocytosis and exocytosis occur?
- What is the structure of the nucleus?
- What is the purpose of ribosomes?
- What are the parts of the cytoskeleton and endomembrane system?
- How are chloroplasts and mitochondria structured?
- What are the parts of a plant cell?
- What occurs during the lytic and lysogenic cycles?
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. Spindle Fibers: Definition, Location & Purpose
During mitotic and meiotic cell division many structures form and disappear as part of the way to organize the cell. One such consideration is the spindle fiber. How do we end up with two unique cells? We find out here.
16. Aquaporins: Definition & Function
This lesson focuses on special water channel proteins called aquaporins. Aquaporins allow water to travel across a cell membrane, thus controlling the water balance within a cell.
17. Diploid Cell: Definition & Examples
Diploid cells are the most numerous cells in all living things - plants and animals. In this lesson, you will learn why they're important for life to continue and how they keep future cells healthy.
18. Haploid: Definition, Life Cycle & Example
This lesson addresses the concept of haploid cells. It describes haploid cells and the role they play in various life cycles. Illustrations, real-world examples, and a brief quiz are included.
19. Homologous: Definition, Characteristics & Structure Examples
Discover the meaning and origin of the term 'homologous.' Learn how this expression is used in several branches of biology including evolutionary biology, genetics and developmental biology.
20. Impermeable Membrane: Definition & Explanation
Sometimes Mother Nature needs to prevent things from going in or out, and sometimes Mother Nature needs to let everything (or just some things) through. This lesson explores permeable, impermeable, and semi-permeable membranes and provides examples in nature for each.
21. Microtubules: Definition, Functions & Structure
The cytoskeleton gives cells structure and shape and allows them to move around. It's also important for intracellular transport. Learn about microtubules, a type of cytoskeletal filament that forms intracellular highways and moveable appendages.
22. Monosaccharides: Definition, Structure & Examples
Carbohydrates are a very important part of our diet because they are one of our main sources of energy. The most basic unit of carbohydrates is monosaccharides, which is the main focus of our lesson.
23. Peroxisomes: Definition, Structure & Functions
This lesson is going to discuss the peroxisomes of the cell. We will look at the structure and function of the peroxisomes as well as how they are formed.
24. Simple Cuboidal Epithelium: Location, Structure & Function
Simple cuboidal epithelium is a type of tissue that is found lining parts of organs and ducts in the body. Its structure allows for absorption and diffusion in those areas. Learn more about this tissue and quiz yourself at the end of the lesson.
25. Intracellular & Extracellular Digestion
In this lesson, we'll explore intracellular and extracellular digestion. We'll go over what each term means, and see examples of each type of digestion.
26. Cell Nucleus: Definition & Examples
In this lesson, we will discuss the structure of the nucleus and how it is in charge of what goes on inside the cell. We will also talk about what types of cells have a nucleus including animal, plant, and fungal cells.
27. Cells With a Nucleus & Membrane-Bound Organelles
This lesson is on cells with a nucleus and membrane bound organelles. In this lesson, we'll go over what these cells are called and define the nucleus. We'll also see examples of membrane bound organelles and their function in the cell.
28. Cell-Free Protein Synthesis: Steps & Applications
In this lesson, we'll talk about protein synthesis, particularly cell-free protein synthesis. We'll discuss why scientists like to make proteins without cells and how they do it.
29. Cells With & Without a Nucleus: Structure & Classification
What are cells? How many general cell types are there? This lesson investigates the main categories of cells and relates each cell type to the presence or absence of a nucleus.
30. Cellular Structure: Function & Definition
Living organisms are divided into two major types, prokaryotes and eukaryotes. This lesson describes the structure and functions of these two cell types. When you are through, you can test your understanding with a quiz.
31. Do Blood Cells Have a Nucleus?
Blood cells have different jobs in the body. In order to perform their jobs well, they have different morphology too. In this lesson we will learn about the nuclei of different blood cells.
32. Pancreatic Acinar Cells: Definition & Function
In this lesson, we'll review the basics of the digestive process, go over the function of the pancreas, and explore the role of pancreatic acinar cells in breaking down food without breaking down our own tissues.
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Other chapters within the College Biology: Help and Review course
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- Review of Inorganic Chemistry For Biologists: Help and Review
- Introduction to Organic Chemistry: Help and Review
- Nucleic Acids - DNA and RNA: Help and Review
- Enzymatic Biochemistry: Help and Review
- DNA Replication - Processes and Steps: Help and Review
- The Transcription and Translation Process: Help and Review
- Genetic Mutations: Help and Review
- Metabolic Biochemistry: Help and Review
- Cell Division: Help and Review
- Plant Biology: Help and Review
- Plant Reproduction and Growth: Help and Review
- Physiology I - The Circulatory, Respiratory, Digestive, Excretory, and Musculoskeletal Systems: Help and Review
- Physiology II - The Nervous, Immune, and Endocrine Systems: Help and Review
- Animal Reproduction and Development: Help and Review
- Genetics - Principles of Heredity: Help and Review
- Principles of Ecology: Help and Review
- Principles of Evolution: Help and Review
- The Origin and History of Life On Earth: Help and Review
- Phylogeny and the Classification of Organisms: Help and Review
- Social Biology: Help and Review
- Basic Molecular Biology Laboratory Techniques: Help and Review
- Analyzing Scientific Data: Help and Review
- Microbiology Overview