Question

Name Date Section Using Your knowledge Questions 1-3. une 23.4 shows a map of the specific areas of the primary somatosensory cortex that represent areas of the body. The cerebral cortex localizes the presise area of the body that sends story nerve impulses. Based on the size of the area presented on the cortex and the size of the body area circle which body area has the greatest density of receptors 1. The lips or the hip 2. The tongue or the lors 3. The foot or the hand Shoulder Toes Genitals ASSE Tooth, gums, and Tongue Pharyn abdominal FIGURE 23.4 Somatosensory cortex. 367

Answer 1

1. The lips will have great density of receptors than the hip.

Justification: Because lips have high density of receptors which helps in identifying objects, sensing temperature, texture and other senses when compared to the hip.

2. The tongue will have great density of receptors than the toes.

Justification: Because the nerve endings on the tongue helps in sensing hot and cold substances.

3. That hand will have great density of receptors than the foot.

Justification: Because hand has more sensory receptors than the foot.

4. The somatosensory cortex of a visually impaired person and a normal vision person remains same. It will not increase in its size or density for a normal vision person and a visually impaired person. What gets changed is the visual cortex, which gets activated and their sensory nerves within fingertips gets plugged into visual cortex.

5. Leprosy often results in loss of pain to the infected body area. This is dangerous to a person as he cannot feel any kind of sense or pain and he can't even explain if he is experiencing any kind of pain or injury. This can lead to injury by himself as he can't sense any pain.

6. If there is no adaptation to touch receptors, there will not be any kind of response or senses felt.

Thank you!