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Related Concept Videos

Motor Units00:46

Motor Units

A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
Motor Units01:13

Motor Units

The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
Electrochemical Cells01:28

Electrochemical Cells

Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
Electro-mechanical Systems01:19

Electro-mechanical Systems

Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Electron Transport Chain Components01:29

Electron Transport Chain Components

The electron transport chain (ETC) is a crucial metabolic pathway that facilitates energy conversion in prokaryotic and eukaryotic cells. In eukaryotes, the ETC comprises four membrane-associated protein complexes in the inner mitochondrial membrane. In prokaryotes, the ETC in the plasma membrane can vary in composition, with fewer or different complexes depending on the organism and environmental conditions. These complexes transfer electrons from electron donors, such as NADH and FADH2, to...

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Related Experiment Video

Updated: Jun 2, 2026

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
11:47

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

Published on: December 22, 2018

Molecular motors.

Manfred Schliwa1, Günther Woehlke

  • 1Adolf Butenandt Institut, Zellbiologie, Universität München, Schillerstrasse 42, 80336 München, Germany. schliwa@bio.med.uni-muenchen.de

Nature
|April 18, 2003
PubMed
Summary
This summary is machine-generated.

Life requires movement, powered by molecular motors, which are protein machines taking nanometre steps. Understanding these essential motors is crucial for cell function and preventing diseases linked to motor defects.

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Last Updated: Jun 2, 2026

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
11:47

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

Published on: December 22, 2018

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging
08:40

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging

Published on: March 13, 2019

Three-Dimensional Motor Nerve Organoid Generation
09:57

Three-Dimensional Motor Nerve Organoid Generation

Published on: September 24, 2020

Area of Science:

  • Biochemistry and Molecular Biology
  • Cell Biology

Background:

  • Life is intrinsically linked to movement, primarily driven by molecular motors.
  • Molecular motors are protein machines utilizing intramolecular amplification for nanoscale movement along cellular tracks.
  • These motors are vital for intracellular transport, cell locomotion, division, and organismal movement.

Purpose of the Study:

  • To elucidate the fundamental principles of molecular motor design and mechanism.
  • To enhance the understanding of the complex cellular roles played by molecular motors.
  • To explore the implications of motor defects in severe diseases.

Main Methods:

  • Analysis of sophisticated intramolecular amplification mechanisms.
  • Observation of nanometre-scale steps along protein tracks.
  • Study of motor function in various cellular processes like transport and division.

Main Results:

  • Derivation of basic principles governing molecular motor design.
  • Emerging understanding of the intricate cellular functions of these motors.
  • Identification of the critical role of molecular motors in cellular mechanics.

Conclusions:

  • Molecular motors are essential for life's movement and cellular functions.
  • Defects in molecular motors can result in severe pathologies.
  • Further research into motor mechanisms promises insights into cellular processes and disease.