Bozeman Science
Unit 4 Review - Homeostasis
Paul Andersen reviews the major concepts within the fourth unit of the new AP Biology framework. He begins by differentiating between negative and positive feedback loops. He explains how a stable internal environment is maintained...
Bozeman Science
Osmoregulation
Paul Andersen explains how organisms regulate their internal osmolarity or not. He starts with a brief description of osmosis and why it is important for animal cell to be surrounded by an isotonic solution. He then explains how...
Crash Course
The Excretory System: From Your Heart to the Toilet - CrashCourse Biology
Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee.
Institute of Human Anatomy
Why Drinking Water Is So Important
In this video, Justin from the Institute of Human Anatomy discusses how the body regulates hydration levels, as well as what happens when the body becomes dehydrated.
Curated Video
Ask Jessi 3
Jessi tackles some more questions from viewers: How did Kemo get his name, snake bites, pick 1 animal, and sick fish.
Curated Video
Osmoregulation: Maintaining the Balance of Water and Mineral Ions in the Body
This video explains the concept of osmoregulation, which refers to the control of the balance of water and mineral ions in the body. The video explains the importance of maintaining a constant internal environment for efficient cell...
Curated Video
Osmoregulation: Maintaining the Balance of Water and Mineral Ions in the Body
This video is about osmoregulation, which is the control of the balance of water and mineral ions in the body. The video explains the importance of maintaining the correct balance of water in cells, as cells that gain or lose too much...
Ancient Lights Media
The Biological Role of Osmosis
Osmosis Set: 3. This clip looks at some of the ways osmosis affects the lives of plants and animals.
Khan Academy
Khan Academy: Water Potential Example
This worked example by Sal Khan calculates the water potential of potato squares based on placing them in various concentrations of sucrose solutions. [6:44]
Bozeman Science
Bozeman Science: Osmoregulation
Paul Andersen explains how organisms regulate their internal osmolarity or not. He starts with a brief description of osmosis and why it is important for animal cell to be surrounded by an isotonic solution. He then explains how...