Question

1. circle the term that does not belong in each of the following groupings. then, fill in the answer blanks with the correct group name.
2. reticular layer keratin dermal papillae meissners corpuscles group: —
3. mole freckle wart malignant melanoma group: —
4. prickle cells stratum basale stratum spinosum cell shrinkage group: —
5. meissners corpuscles lamellar corpuscles merkels cells arrector pili group: —

Explanation:

1. The reticular layer is part of the dermis. Keratin is a protein in skin, hair and nails. Dermal papillae are in the dermis. Meissner's corpuscles are touch - sensitive nerve endings. These are all related to skin structure and function. But keratin is a protein, not a skin structure like the others.
2. Moles, freckles, warts and malignant melanoma are all skin conditions or growths. A mole is a common skin growth. A freckle is a small, flat, pigmented spot. A wart is a small, hard skin growth caused by a virus. Malignant melanoma is a type of skin cancer. Stratum basale is a layer of the epidermis, not a skin condition like the others.
3. Prickle cells (keratinocytes in the stratum spinosum), stratum basale, stratum spinosum are all related to the epidermis structure. Cell shrinkage is a cellular process and not related to the epidermal layers like the others.
4. Meissner's corpuscles, lamellar corpuscles, Merkel's cells are all sensory receptors in the skin. Arrector pili muscles are smooth muscles that cause hair to stand up, different from the sensory - related ones.

Answer:

1. Keratin
2. Stratum basale
3. Cell shrinkage
4. Arrector pili