The sensory receptors refer to the portions of the nervous system, which sense variations in the external or internal surroundings. The sensory input can be in various forms, comprising taste, pressure, light, sound, pH of blood, or levels of hormones, which are transformed into a signal and are transmitted to the brain or spinal cord.  
In the sensory centers of the brain, the barrage of information is integrated and a response is produced. The response, that is, a motor output refers to a signal conducted towards organs via motor neurons, which then transforms the signal into some kind of action, like changes in heart rate, movement, discharge of hormones, and others.  
 
        
                    
             
        
        
        
Answer:
It causes the object to slow down or stop.
Explanation:
Friction is a unknown force pressing against another force slightly, making the moving object slow down.
Hope I help :)
 
        
             
        
        
        
23 from mom,
23 from dad,
all together 46! :3
        
             
        
        
        
Answer:
see below :)
Explanation:
There are three types of ecosystems; freshwater, ocean, and terrestrial. 
 
        
                    
             
        
        
        
Alternating sugar and phosphate molecules also 4 types of nitrogen bases