BIO251 Week 5 Study Guide
Possible MC questions:
1. What organs make up the integumentary system?
a. Skin, nails, glands
2. What are the three layers of the skin?
a. Epidermis
b. Dermis
c. Hypodermis
3. What are the five layers (strata) of the epidermis, going from superficial to deep?
a. Stratum lucidium is only found in THICK skin
4. Label the three layers of the skin and the 5 layers of the epidermis.
5. What are the types of cells found in the epidermis? In which layer are they found
and what are their functions?
a. Melanocytes = produce melanin (skin pigment); found in stratum basale
b. Ketatinocytes = most abundant cells in the epidermis; produce keratin
c. Dendritic = immunological function
6. What are the two types of skin? Where is each type found on the body?
a. Thick = palms, soles of feet
b. Thin = fingers
7. What are the two layers of the dermis?
a. Papillary (superficial)
b. Reticular (deep)
8. What are the components/tissue types found in dermis layer of skin?
9. What are the four tactile mechanoreceptions found in the skin? What layer are
they found in and what are their functions?
a. Pacinian Corpuscles – found in dermis; sense DEEP pressure, HIGH frequency
b. Meissner’s Corpuscles – Dermis + Epidermis; low frequency vibration
c. Merkel cells – epidermis; light touch
d. RufÏnni Endings – dermis; sense stretch
10. What are the two components/tissue types found in the hypodermis? What are
their functions?
a. Adipose tissue (AKA fat) -- function = insulation
11. Label the layers/parts of a hair follicle
12. Be able to identify skin histologically on a microscope slide.
13. What type of epithelium is skin and nails made of?
a. Keratinized stratified squamous
14. What is the difference between an endocrine and exocrine gland? Which type
of endocrine and exocrine glands are most abundant in the body?
