BSC 2085 Exam 2 UPDATED ACTUAL Questions
and CORRECT Answers
Integumentary system skin, hair, nails, sweat glands, sebaceous glands
Epidermis outermost layer of skin, closest to body surface,
consists mostly of keratinized stratified squamous
epithelial cells
Dermis Underneath epidermis
Hypodermis Not a true layer of skin, beneath the skin, shares the
same components as skin
4 cell types of epidermis keratinocytes, melanocytes, dendritic cells, tactile
cells
dendritic (langerhan) cells Macrophages - key activators of immune system.
Engulf or phagocytize antigens which helps with
immune response
tactile cells (merkel cells) sensory touch receptors
Keratinocytes Keratin cells, fibrous keratin
Melanocytes Melanin cells, pigment
, Stratum Layer
5 layers of skin stratum basale, stratum spinosum, stratum
granulosum, stratum lucidum, stratum corneum
stratum basale Basement layer, deepest layer of epidermis,
actively mitotic, cell dies as it moves toward
surface, new young cells
stratum spinosum Spiny layer, has keratinocytes, several layers thick
stratum granulosum granular layer, 4-6 cells thick, cells are flattened,
layer is thin, granules: keratohyaline granules and
lamellar granules
stratum lucidum Clear layer, found only in thick skin. Thin,
translucent band of 2-3 rows of clear, flat, dead
keratinocytes. Superficial to the stratum
granulosum
Stratum corneum horny layer, most superficial layer. 20-30 rows of
flat, anucleated, keratinized dead cells. Gives
protection, prevents water loss, acts as a barrier
Apoptosis programmed cell death
Dermis papillary layer and reticular layer
How many cells do we shed a About 50,000
minute?
papillary layer superficial layer of the dermis, made of areolar
connective tissue. Had collagen and elastic fibers
and CORRECT Answers
Integumentary system skin, hair, nails, sweat glands, sebaceous glands
Epidermis outermost layer of skin, closest to body surface,
consists mostly of keratinized stratified squamous
epithelial cells
Dermis Underneath epidermis
Hypodermis Not a true layer of skin, beneath the skin, shares the
same components as skin
4 cell types of epidermis keratinocytes, melanocytes, dendritic cells, tactile
cells
dendritic (langerhan) cells Macrophages - key activators of immune system.
Engulf or phagocytize antigens which helps with
immune response
tactile cells (merkel cells) sensory touch receptors
Keratinocytes Keratin cells, fibrous keratin
Melanocytes Melanin cells, pigment
, Stratum Layer
5 layers of skin stratum basale, stratum spinosum, stratum
granulosum, stratum lucidum, stratum corneum
stratum basale Basement layer, deepest layer of epidermis,
actively mitotic, cell dies as it moves toward
surface, new young cells
stratum spinosum Spiny layer, has keratinocytes, several layers thick
stratum granulosum granular layer, 4-6 cells thick, cells are flattened,
layer is thin, granules: keratohyaline granules and
lamellar granules
stratum lucidum Clear layer, found only in thick skin. Thin,
translucent band of 2-3 rows of clear, flat, dead
keratinocytes. Superficial to the stratum
granulosum
Stratum corneum horny layer, most superficial layer. 20-30 rows of
flat, anucleated, keratinized dead cells. Gives
protection, prevents water loss, acts as a barrier
Apoptosis programmed cell death
Dermis papillary layer and reticular layer
How many cells do we shed a About 50,000
minute?
papillary layer superficial layer of the dermis, made of areolar
connective tissue. Had collagen and elastic fibers
