相关实验视频

Updated: Aug 1, 2026

Analysis of Tubular Membrane Networks in Cardiac Myocytes from Atria and Ventricles
10:30

Analysis of Tubular Membrane Networks in Cardiac Myocytes from Atria and Ventricles

Published on: October 15, 2014

心肌束和纤维混乱在25米厚的部分

H Fujiwara, C Kawai, Y Hamashima

    Circulation
    |June 1, 1979
    PubMed
    概括

    肌动脉纤维在缩性心肌病 (HCM) 中的失调实际上是一种复杂的,三维的带失调. 这种先天性带乱存在于HCM心脏中,可能源自出生.

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    Isolation of Human Ventricular Cardiomyocytes from Vibratome-Cut Myocardial Slices11:19

    Isolation of Human Ventricular Cardiomyocytes from Vibratome-Cut Myocardial Slices

    Published on: May 10, 2020

    Dissection of Single Skeletal Muscle Fibers for Immunofluorescent and Morphometric Analyses of Whole-Mount Neuromuscular Junctions08:41

    Dissection of Single Skeletal Muscle Fibers for Immunofluorescent and Morphometric Analyses of Whole-Mount Neuromuscular Junctions

    Published on: August 14, 2021

    相关概念视频

    Action Potentials01:41

    Action Potentials

    Overview
    Neuromuscular Junction And Blockade01:29

    Neuromuscular Junction And Blockade

    The site of chemical communication between a motor neuron and a muscle fiber is called the neuromuscular junction (NMJ). The end of the motor neuron at the NMJ divides into a cluster of synaptic end bulbs. The cytoplasm of these bulbs consists of synaptic vesicles enclosing acetylcholine molecules, the principal neurotransmitter released at the NMJ. The region opposite the synaptic bulb that ends in the muscle fiber is called the motor end plate, which has acetylcholine receptors. Within the...
    Motor Unit Stimulation01:20

    Motor Unit Stimulation

    When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
    The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
    Muscle Stimulation Frequency01:22

    Muscle Stimulation Frequency

    The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
    Wave summation
    At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...