19. The density of sensory receptors in the fingertip is forearm. larger/smaller

Question

19. The density of sensory receptors in the fingertip is forearm. larger/smaller) compared to the density of sensory receptors in the anterior 24 Exercise 18.13: Tactile Localization 20. When stimulating the tips of the fingers, it may be difficult to locate the exact source of sensory input because only one recesptive field will ikely be Exercise 18.14: General Sensory Receptor Tests: Adaptation 21. The nervous system adapts to a constant stimulus by becoming. stimulated. (True/False) 25 26 (less/more) sensitive to that stimulus over time.

Explanation / Answer

19)The density of sensory receptor in the fingertip is larger compared to the density of sensory receptors in the anterior forearm.The fingertip has higher density of the receptor due to the presence of the smaller receptive field. The density of the anterior forearm comparatively is smaller due to the presence of the large receptive size of the field.

20) When stimulating the tips of the fingers, it may be difficult to locate the exact source of sensory input because only one receptive field will likely be stimulated – True. Since the fingertips have smaller receptive field , it is not easy to find out the exact source of the sensory input. It is because only one of the field is being stimulated.

21)The nervous system adapts to a constant stimulus by becoming more sensitive to that stimulus over time. With time, due to the ability of the nervous system to identify the stimuli, the system becomes more sensitive and hence is able to constantly be more responsive.

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