Khan Academy
This article provides an overview of neuron structure and function in the human nervous system.
Formatting Tips - Khan Academy
Neurons (or nerve cells) are specialized cells that transmit and receive electrical signals in the body. Neurons are composed of three main parts: dendrites, a cell body, and an axon.
The synapse (article) | Human biology | Khan Academy
Explore the synapse, the junction between neurons, and learn about its role in transmitting signals in the nervous system.
Khan Academy
If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Active transport - Khan Academy
The membrane potential of a typical cell is -40 to -80 millivolts, with the minus sign meaning that inside of the cell is more negative than the outside 1 . The cell actively maintains this membrane potential, and we’ll see how it forms in the section on the sodium-potassium pump (below).
Khan Academy
Learn about neuron function in the nervous system on Khan Academy.
Khan Academy
The stapes bone vibrates, pushing fluid through the cochlea, which moves the organ of Corti. This motion triggers hair cells, causing potassium and calcium to flow into the cell, firing an action potential. This signal then travels to the brain via the auditory nerve.
Neuromuscular junction, motor end-plate - Khan Academy
How do neurons talk directly to muscle cells? Learn about how a neuronal message is translated into a muscular action at the neuromuscular junction. By Raja Narayan.
Khan Academy
Types of immune responses: Innate and adaptive, humoral vs. cell-mediated B lymphocytes (B cells) Professional antigen presenting cells (APC) and MHC II complexes
Endocrine system physiology and disease | Khan Academy
You can’t really point to any single organ as “the endocrine system,” because they’re actually a family of glands that secrete hormones into the body. Hormones travel through the bloodstream to interact with specific target cells and organs. This signaling system helps to keep the entire body well-balanced and on the same page.