Answer :

The difference in sensitivity between the fingertip and the back of the neck help our bodies to maintain homeostatic because Carotid sinus as well as arotic bodies are found to be present in the neck . Hence if neck will be a lot  sensitive then even a small stimulation of neck, this can lead to  overactivity of vagus bring about decrease heart rate .

What are the reason can you give for the difference in sensitivity between the fingertip?

The part of of the human brain that is known to get the information from your sensory neurons is one that do not treat all parts of the body the same or equally.

Note that the reason a person is  more sensitive on your fingertips than their elbow is that there are a lot of sensory neurons on the fingertips.

Hence, The difference in sensitivity between the fingertip and the back of the neck help our bodies to maintain homeostatic because Carotid sinus as well as arotic bodies are found to be present in the neck . Hence if neck will be a lot  sensitive then even a small stimulation of neck, this can lead to  overactivity of vagus bring about decrease heart rate .

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