I'm a learning coder trying to understand this code from a sample MVC framework.

The below code is from a "model" file. I've done research on Backbone.js, but I'm still confused as to exactly how this code pull information from the app's database. For example, how are base_url, Model.prototype, and Collection.prototype being used to retrieve information from the backend? Any help would be greatly appreciated.

exports.definition = {
  config : {
    "defaults": {
      "title": "-",
      "description": "-"
    },
    "adapter": {
      "type": "rest",
      "collection_name": "schools",
      "base_url" : "/schools/",
    }
  },

  extendModel: function(Model) {        
    _.extend(Model.prototype, {
       // Extend, override or implement Backbone.Model 
                 urlRoot: '/school/',
                 name:'school',
       parse: function(response, options) {
         response.id = response._id;
         return response;
       },   
            });

    return Model;
  },

  extendCollection: function(Collection) {      
    _.extend(Collection.prototype, {
        // Extend, override or implement Backbone.Collection 
                 urlRoot: '/schools/',  
                 name: 'schools',
    });

    return Collection;
  }
}