Khan Academy
Khan Academy: Sodium Potassium Pump
This video explains how a sodium-potassium pump can maintain a voltage gradient across a cell or neuron's membrane. The sodium-potassium pump goes through cycles of shape changes to help maintain a negative membrane potential. [13:52]
Khan Academy
Khan Academy: Cell Membrane Fluidity
The resource from Khan Academy and the Association of American Medical Colleges provides study content for the MCAT. This resource discusses how the phospholipids in the cell membrane maintain membrane fluidity. By William Tsai.
Khan Academy
Khan Academy: Uniporters, Symporters and Antiporters
Uniporters, symporters, and antiporters are proteins that are used in the transport of substances across a cell membrane. This video describes how each of these works in the transport process. [7:13]
Next Vista for Learning
Next Vista for Learning: Animal Cells
A video explaining the structure and function of the basis organelles found in an animal cell. [1:23]
Bozeman Science
Bozeman Science: Cell Membranes
Paul Andersen explains how cells are selectively permeable with the help of their cell membrane. The main constituents of the cell membrane, including cholesterol, glycolipids, glycoproteins, phospholipids, and proteins are included. The...
Bozeman Science
Bozeman Science: Transport Across Cell Membranes
Paul Andersen describes how cells move materials across the cell membrane. All movement can be classified as passive or active. Passive transport, like diffusion, requires no energy as particles move along their gradient. Active...
Bozeman Science
Bozeman Science: Cell Membrane
Paul Andersen gives you a brief introduction to the cell membrane. He starts by describing amphipathic nature of a phospholipid and how it assembles into a membrane. He gives an overview of the fluid mosaic model inside cells. He also...
Bozeman Science
Bozeman Science: Interstitial Fluid
Paul Andersen explains the importance and location of interstitial fluid. He describes both the hydrostatic and osmotic pressures that move fluid between the interstitial fluid and the capillary. He also explains the major function of...