A. Cells have characteristic structures and functions that make them distinctive.
B. Processes in a cell can be classified broadly as growth, maintenance, reproduction, and homeostasis.
C. Life can be organized in a functional and structural hierarchy ranging from cells to the biosphere.
D. Most multicellular organisms are composed of organ systems whose structures reflect their particular function.
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Original Student Tutorials Science - Grades 9-12
Learn about the function of the cell membrane as a selective barrier that moves material into and out of the cell to maintain homeostasis with this interactive tutorial.
Student Resources
Original Student Tutorial
Learn about the function of the cell membrane as a selective barrier that moves material into and out of the cell to maintain homeostasis with this interactive tutorial.
Type: Original Student Tutorial
Tutorials
This Khan Academy tutorial guides you through the processes of diffusion and osmosis while explaining the vocabulary and terminology involved in detail.
Type: Tutorial
This Khan Academy tutorial addresses the importance of the phospholipid bilayer in the structure of the cell membrane. The types of molecules that can diffuse through the cell membrane are also discussed.
Type: Tutorial
This tutorial will help you to understand how a concentration gradient across a membrane is used. When a molecule or an ion is moved across a membrane from an area of low concentration to an area of high concentration then a gradient is generated. This gradient can be chemical or it can also create a difference in electrical charge across the membrane if ions are involved. The proton pump generates an electrical and chemical gradient that can be used to create ATP which can drive a large number of different biochemical reactions.
Type: Tutorial
Students will learn about the different types of proteins found in the cell membrane while viewing this Khan Academy tutorial video.
Type: Tutorial
This online tutorial will help you to understand the process of regulated secretion. In regulated secretion, proteins are secreted from a cell in large amounts when a specific signal is detected by the cell. The specific example used in this tutorial is the release of insulin after a glucose signal enters a pancreatic beta cell.
Type: Tutorial
All living things are made of cells. In the human body, these highly efficient units are protected by layer upon layer of defense against icky invaders like the cold virus. Shannon Stiles takes a journey into the cell, introducing the microscopic arsenal of weapons and warriors that play a role in the battle for your health.
Type: Tutorial
This tutorial will help the learners to learn about the anatomy of the cell. As the learners move the cursor over each cell organelle, they are shown information about that organelle's structure and function.
Type: Tutorial
Virtual Manipulatives
This virtual manipulative will help the students to understand that osmosis is the movement of water molecules from an area of high concentration across a semipermeable membrane to an area of low concentration. This illustration of the diffusion process will help the students to understand the concept of osmotic pressure which is created by the movement of the water based on their concentration gradient and thus resulting in the difference of the solute concentration.
Type: Virtual Manipulative
This interactive cell membrane simulation allows students to see how different types of channels allow particles to move through the membrane.
Sample learning goals:
- Predict when particles will move through the membrane and when they will not.
- Identify which particle type will diffuse depending on which type of channels are present.
- Predict the rate of diffusion based on the number and type of channels present.
Type: Virtual Manipulative
Parent Resources
Tutorial
This tutorial will help the learners to learn about the anatomy of the cell. As the learners move the cursor over each cell organelle, they are shown information about that organelle's structure and function.
Type: Tutorial
Virtual Manipulative
This virtual manipulative will help the students to understand that osmosis is the movement of water molecules from an area of high concentration across a semipermeable membrane to an area of low concentration. This illustration of the diffusion process will help the students to understand the concept of osmotic pressure which is created by the movement of the water based on their concentration gradient and thus resulting in the difference of the solute concentration.
Type: Virtual Manipulative