About This Chapter
MCAS STE Biology: Cellular Structure & Transport - Chapter Summary
The lessons in this chapter will review the various methods for transport in and out of a cell. The information covered in this chapter will help you prepare for questions related to cell biology on the MCAS STE Biology exam. After completing this chapter you will have studied:
- Structure and function of a cell
- Hydrophobic and hydrophilic properties of the phospholipid bilayer
- The Fluid Mosaic Model of the cell membrane
- Passive transport in cells by diffusion and osmosis
- Examples of active transport in cells
- Exocytosis and endocytosis and across the cell membrane
- Comparison of eukaryotic and prokaryotic cells
The lessons in this chapter have been developed by educational professionals to provide you with several methods for effective learning. Each lesson contains a video so you can visually see examples and illustrations of the material being covered. There is also a transcript of the video included with each lesson for text-based learning. You can take the self-assessment quiz at the end of each lesson to test your understanding of the information.
MCAS STE Biology: Cellular Structure & Transport Chapter Objectives
The MCAS STE Biology exam is one of four Science and Technology/Engineering exams taken by high school students in Massachusetts. The test assesses students' level of proficiency in biology set by the standards of the Massachusetts Curriculum Framework. The MCAS STE Biology exam is comprised of five major content areas. The information reviewed in this lesson will prepare you for questions related to biochemistry and cell biology, which account for 25% of the total score.
The MCAS STE Biology exam consists of 40 multiple-choice questions and 5 open-ended responses. The open-ended questions could be related to any of the five content areas so it's important to study for all of them. You will need a score of 220 or higher on one of the four STE exams to qualify for graduation.
1. The Cell: Structure & Function
The cell is a small, but complex structure. Take a look inside the outer plasma membrane of a cell and discover the functions of some common cellular components, including the nucleus, endoplasmic reticulum, Golgi apparatus and mitochondria, in this lesson.
2. 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?
3. 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.
4. 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.
5. 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!
6. 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.
7. 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.
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Other chapters within the MCAS - Science & Technology-Engineering - Biology: Test Prep & Practice course
- MCAS STE Biology: Chemistry of Life
- MCAS STE Biology: Enzymatic Biochemistry
- MCAS STE Biology: Organelles
- MCAS STE Biology: Classification & Evolution
- MCAS STE Biology: Cellular Respiration & Photosynthesis
- MCAS STE Biology: Cell Growth & Reproduction
- MCAS STE Biology: DNA Replication
- MCAS STE Biology: Transcription & Translation
- MCAS STE Biology: Genetics & Heredity
- MCAS STE Biology: Digestive & Circulatory Systems
- MCAS STE Biology: Nervous & Endocrine Systems
- MCAS STE Biology: Respiratory & Musculoskeletal Systems
- MCAS STE Biology: The Reproductive System
- MCAS STE Biology: Evolution & Biodiversity
- MCAS STE Biology: Ecology
- MCAS STE Biology: Scientific Method & Inquiry
- MCAS STE Biology: The Science Lab
- MCAS STE Biology: Using Mathematics in Science
- MCAS - Science & Technology-Engineering - Biology Flashcards