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28 January, 18:41

Our lips are more sensitive than our knees to sensations of touch due to which of the following? (A) More neurotransmitters are released when the lips are touched. (B) A larger area of the sensory cortex is associated with our lips. (C) The dendrites connected to the lips are especially sensitive. (D) The medulla routes impulses from the lips directly to our brainstem. (E) Our lips are directly connected to the sensory cortex, but our knees are not.

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  1. 28 January, 20:00
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    The correct answer is (B) A larger area of the sensory cortex is associated with our lips.

    Explanation:

    All the sensory inputs that come from the body is received by the somatosensory cortex. Neurons are responsible for sensing the perception of touch, heat, pains, etc on any body part and pass the information to the somatosensory cortex where the information gets processed.

    Our lips contain many nerve endings and nerves which makes it very sensitive towards touch, warm, and cold. So due to the large number of nerve in lips it is considered as an erogenous zone which states that this area is very highly sensitive. So the correct answer is B.
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