Sensory Reception

In our organism, special cells, and nerve endings, called sensory receptors, are stimulated for certain types of stimulus and send them to the brain in form of electrochemical impulses. Summarizing, sensory receptors start the neural impulse in our body.
Sensation is the feeling we have when the neural impulse reach our brain -- feeling cold in the face -- however the interpretation of the feeling is known as perception -- Jack feels colder than Juan. Sensory adaptation is the process by which our brain chose to ignore information from sensory receptors, for example our noses are seem by the eye, but our brain choose to ignore it. 

Sensory Receptors 


able to transform the stimuli to electrochemical energy, which can be translated by our nervous system
Our sensory receptors are specialized cells that are able to detect certain types of stimuli. In humans, sensory receptors are divide into four categories: photoreceptors, chemoreceptors, mechanoreceptors, and thermoreceptors. Each type is able to convert the stimuli they receive into electrochemical energy, so it can be translated by our nervous system.

• Photoreceptors are stimulates by light. They are important for our vision, since the most important photoreceptors are found in our eyes (they are called rods and cones).
• Chemoreceptors are stimulated by chemicals, the tongue and nose contain certain types of chemoreceptors and they are responsible to recognize taste and smell. Other chemoreceptors are found inside our body. 
• Mechanoreceptors respond to mechanical force in form of pressure. Our skin is full of these receptors. It is also responsible for the hearing, balance and body position.
• Thermoreceptors respond to the changes in temperature.