Exam 3 - BMCC BIO 425 questions with
answers
Epidermis - ....🔰VERIFIED ANSWERS.... ✔✔- keratinized stratified
squamous epithelium
- lacks blood vessels
- surface of the skin
- consists of dead blood cells packed with keratin
Stem cells - ....🔰VERIFIED ANSWERS.... ✔✔found in the deepest layer of the
epidermis (the basal layer) and they divide to give rise to keratinocytes
Keratinocytes - ....🔰VERIFIED ANSWERS.... ✔✔synthesizes keratin
Melanocytes - ....🔰VERIFIED ANSWERS.... ✔✔synthesize black to brown
pigment (melanin)
Tactile cells - ....🔰VERIFIED ANSWERS.... ✔✔found in the basal layer of the
dermis and are associated with underlying dermal nerve fiber
Dendritic cells - ....🔰VERIFIED ANSWERS.... ✔✔found in 2 layers of the
epidermis, they stand against toxins, microbes and detect such invaders then
alert the immune system
, Stratum basale (basal surface) - ....🔰VERIFIED ANSWERS.... ✔✔the lowest
layer closest to the dermis, consists of single layer cuboidal to low columnar
cells
Stratum spinosum - ....🔰VERIFIED ANSWERS.... ✔✔thickest layer of the
epidermis in thin skin, several layers of keratinocytes, dendritic cells are found
in this layer, desmosomes hold cells together in this layer, the cells are also
bound together by tight junctions
Stratum granulosum - ....🔰VERIFIED ANSWERS.... ✔✔3-5 layers of
keratinocytes, found more in thick skin than thin skin
Stratum lucidum - ....🔰VERIFIED ANSWERS.... ✔✔only seen in thick skin
Stratum corneum - ....🔰VERIFIED ANSWERS.... ✔✔consists of 30 layers of
dead, scaly, keratinized cells that form a durable surface layer resistant to
abrasion, penetration and water loss
The Dermis - ....🔰VERIFIED ANSWERS.... ✔✔beneath the epidermis, a
connective tissue layer composed of collagen fibers and contains elastic and
reticular fibers, fibroblasts, supplied with blood vessels. cutaneous glands and
nerve endings
Dermal papillae - ....🔰VERIFIED ANSWERS.... ✔✔upward waves in the
boundary between the dermis and epidermis
Epidermal ridges - ....🔰VERIFIED ANSWERS.... ✔✔downward waves in the
boundary between the dermis and epidermis
answers
Epidermis - ....🔰VERIFIED ANSWERS.... ✔✔- keratinized stratified
squamous epithelium
- lacks blood vessels
- surface of the skin
- consists of dead blood cells packed with keratin
Stem cells - ....🔰VERIFIED ANSWERS.... ✔✔found in the deepest layer of the
epidermis (the basal layer) and they divide to give rise to keratinocytes
Keratinocytes - ....🔰VERIFIED ANSWERS.... ✔✔synthesizes keratin
Melanocytes - ....🔰VERIFIED ANSWERS.... ✔✔synthesize black to brown
pigment (melanin)
Tactile cells - ....🔰VERIFIED ANSWERS.... ✔✔found in the basal layer of the
dermis and are associated with underlying dermal nerve fiber
Dendritic cells - ....🔰VERIFIED ANSWERS.... ✔✔found in 2 layers of the
epidermis, they stand against toxins, microbes and detect such invaders then
alert the immune system
, Stratum basale (basal surface) - ....🔰VERIFIED ANSWERS.... ✔✔the lowest
layer closest to the dermis, consists of single layer cuboidal to low columnar
cells
Stratum spinosum - ....🔰VERIFIED ANSWERS.... ✔✔thickest layer of the
epidermis in thin skin, several layers of keratinocytes, dendritic cells are found
in this layer, desmosomes hold cells together in this layer, the cells are also
bound together by tight junctions
Stratum granulosum - ....🔰VERIFIED ANSWERS.... ✔✔3-5 layers of
keratinocytes, found more in thick skin than thin skin
Stratum lucidum - ....🔰VERIFIED ANSWERS.... ✔✔only seen in thick skin
Stratum corneum - ....🔰VERIFIED ANSWERS.... ✔✔consists of 30 layers of
dead, scaly, keratinized cells that form a durable surface layer resistant to
abrasion, penetration and water loss
The Dermis - ....🔰VERIFIED ANSWERS.... ✔✔beneath the epidermis, a
connective tissue layer composed of collagen fibers and contains elastic and
reticular fibers, fibroblasts, supplied with blood vessels. cutaneous glands and
nerve endings
Dermal papillae - ....🔰VERIFIED ANSWERS.... ✔✔upward waves in the
boundary between the dermis and epidermis
Epidermal ridges - ....🔰VERIFIED ANSWERS.... ✔✔downward waves in the
boundary between the dermis and epidermis
