BIO105 Study Guide - Quiz Guide: Stratum Granulosum, Stratum Spinosum, Stratum Corneum
1. Name the 4 cell types of the epidermis
Keratinocytes (produce keratin), melanocytes (produce the
pigment melanin), dendritic cells (macrophages), tactile cells
(sensory receptors).
2. Name the 5 layers of deep skin.
Stratum basale, stratum spinosum, stratum granulosum, stratum
lucidum, stratum corneum.
3. What are the two layers of the dermis?
Papillary layer and reticular layer.
4. Why are cleavage lines important to surgeons?
Because incisions parallel to cleavage lines heal more readily.
5. What are 4 functions of hair?
Warn off insects on skin, guards against physical trauma,
protection from heat loss, shield skin from sunlight.
6. What structure causes goose bumps”?
Arrector pili.
7. What are the 3 main parts of a finger nail?
Free edge, nail plate, root.
8. Why do nail beds normally appear pink?
Because of the underlying capillaries.
9. Which are more numerous? Epicrine or Apocrine glands?
Eccrine glands are more numerous.
10. What are 6 functions of skin?
Protection, body temperature regulation, cutaneous sensations,
metabolic functions, blood reservoir, excretion of wastes.
