During lab class,you conducted a two-point discrimination test on your lab partner.At the tip of the index finger,the two-point discrimination was 5 mm.On the dorsal surface of the hand,the two-point discrimination was 10 mm.Given the results of this test,which of the following statements is true?
A) The density of skin receptors is equal in both areas tested.
B) The density of skin receptors is greater on the dorsal surface of the hand than on the tip of the index finger.
C) The density of skin receptors is greater at the tip of the index finger than on the dorsal surface of the hand.
D) There is not enough information to draw a conclusion about the density of skin receptors in the areas that were tested.

Question

Quizplus · Accepted Answer

The two-point discrimination test measures the density of somatosensory receptors in different areas of the body. The test result indicates that the lab partner was able to discern two separate points at a smaller distance on the tip of the index finger (5 mm) than on the dorsal surface of the hand (10 mm). This implies that the density of skin receptors is greater at the tip of the index finger than on the dorsal surface of the hand. Therefore, the correct answer is C.

During Lab Class,you Conducted a Two-Point Discrimination Test on Your