--%>
Assignment Help - homework help

Description of neurotransmitter of neuromuscular junction

Give a brief description of neurotransmitter of neuromuscular junction? How does nervous system trigger the muscle contraction?

E

Expert

Verified

Nervous cells which trigger muscle contraction are motor neurons. Neurotransmitter of motor neurons is acetylcholine. When a motor neuron is stimulated depolarizing current flows along the membrane of its axon till reaching the synapse at neuromuscular junction (neural impulse passage zone between axon extremity and sarcolemma). Near the axonal extremity depolarization permits entrance of calcium ions in the axon (note that calcium also has a relevant function here). The calcium ions excite the neuron to liberate acetylcholine in synapse.

Acetylcholine then binds to special receptors into outer surface of sarcolemma, permeability of this membrane is changed and an action potential is created. The depolarization is then conduced along sarcolemma to sarcoplasmic reticulum that thus liberates calcium ions for sarcomere contraction.

   Related Questions in Biology

  • Q : Organizational structure Organizational

    Organizational structure Organizational structure refers to the hierarchical arrangement of various positions in an enterprise. It also defines the relationship betw

    		•
  • Q : Concept of Human Resource Planning The

    The process of preparing a set of decisions for action in the future is called planning. Human Resources planning may then be interpreted as a process of the preparing a set of decisions on human resources development for action by human resources in future. The

    		•
  • Q : Explain zone of equivalence Explain the

    Explain the meaning of zone of equivalence?

    		•
  • Q : Group Decision Making Techniques -

    1) Interacting groups: the most common form of group decision-making takes place in interacting groups. In these groups, members meet face-to-face and rely on both verbal and Nonverbal interaction to communicate with each other. But interacting groups often censo

    		•
  • Q : Performance gap in radiology department

    What key questions you need to have answered in order to reach some sort of reasonable conclusion about the performance gap causes?The following lines list some of the key questions that are required to address the research objectives:

    		•
  • Q : Explanation of secondary immune response

    Give a brief explanation of secondary immune response.

    		•
  • Q : Bacterial and animal cells Regarding

    Regarding the existence of nucleus what is the basic difference between bacterial and animal cells?

    		•
  • Q : Big 5 Traits Model of Personality -

    The 'big five' personality traits model has attracted the attention of both researchers and managers. The potential value of this framework lies in the fact that it includes an integrated set of traits that appear to be valid predictors of certain behaviors at the workplace. According to Fred Lut

    		•
  • Q : Psychological Dimensions of Jungian's

    Carl Jung's theories and personality types are very relevant to consumer behavior. Marketers are benefited by using Myers-Briggs type indicators that measures the following pairs of psychological dimensions: Sensing-intuiting. Thinking-feeling.

    		•
  • Q : Cognitive neuroscience Cognitive

    Cognitive neuroscience How did the discipline of cognitive neuroscience emerge and develop? In the following, the most important  historical landmarks will be briefly described that led into the development of this exciting

    		•