Khan Academy
Khan Academy: Energy and Transport: Introduction to Passive and Active Transport
Introduction to passive and active transport. [8:06]
Khan Academy
Khan Academy: Energy and Transport: Introduction to Kinetics
Kinetics is the study of reaction rates and how they are affected. Many factors, such as concentration, pressure, temperature, and enzyme activity, can impact the rate of a reaction. [15:27]
Khan Academy
Khan Academy: Sodium Potassium Pump
This video explains how the sodium-potassium (Na+/K+) pump works and its role in establishing resting membrane potentials. [7:18]
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: 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]
Sophia Learning
Sophia: Diffusion: Lesson 3
This lesson explains the process of diffusion. It explains how diffusion is a passive form of transport, used to move molecules down their concentration gradient. It is 3 of 8 in the series titled "Diffusion."
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: Ap Biology Lab 1 Diffusion & Osmosis
Paul Andersen starts with a brief description of diffusion and osmosis. He then describes the diffusion demonstration and how molecules move over time. He then explains the concepts behind the osmosis lab and how potatoes are affected by...