BIO 168 Midterm Exam Questions and
Answers 100% Pass
Skin layers from top to bottom - ✔✔Stratum corneum, Stratum lucidem,
Stratum granulosum, Stratum spinosum, Stratum basale
Epidermis (surface) - ✔✔keratinized, stratified squamous epithelium,
made of keratinocytes - produce fibrous protein keratin and also made of
melanocytes that produce melanin, epidermal dendritic cells (Langerhans)
and tactile cells (Merkel)
Dermis (middle) - ✔✔strong, flexible connective tissue that is made mostly
of fibroblasts and macrophages as well as occasionally mast cells and
WBCs, 2 layers - thin papillary layer (vascular) and thicker reticular layer
(strength)
Hypodermis (deep) - ✔✔subcutaneous layer, mostly adipose tissue
1
100% Pass Guarantee Katelyn Whitman, All Rights
, What gives us our skin color? - ✔✔melanin - yellow to reddish-brown to
black pigments give diversity to skin colors
What are the four appendages of the skin? - ✔✔hairs and hair follicles,
nails, sweat glands and oil glands
What is the function of the hair appendage? - ✔✔alerting the body to the
presence of insects on skin, guarding scalp against trauma, heat loss and
sunlight
What is the function of the nails appendage? - ✔✔protect the end of
fingers/toes from injury, allow ability to pick up objects, support tips
What is the function of the sweat glands appendage? - ✔✔apocrine -
sexually stimulated scent glands, eccrine - most common sweat gland,
thermoregulation, mammary glands in females secrete milk (modified
apocrine)
What are the functions of skin? - ✔✔Protection, body temperature
regulation, cutaneous sensation, metabolic functions, blood reservoir,
excretion
2
100% Pass Guarantee Katelyn Whitman, All Rights
Answers 100% Pass
Skin layers from top to bottom - ✔✔Stratum corneum, Stratum lucidem,
Stratum granulosum, Stratum spinosum, Stratum basale
Epidermis (surface) - ✔✔keratinized, stratified squamous epithelium,
made of keratinocytes - produce fibrous protein keratin and also made of
melanocytes that produce melanin, epidermal dendritic cells (Langerhans)
and tactile cells (Merkel)
Dermis (middle) - ✔✔strong, flexible connective tissue that is made mostly
of fibroblasts and macrophages as well as occasionally mast cells and
WBCs, 2 layers - thin papillary layer (vascular) and thicker reticular layer
(strength)
Hypodermis (deep) - ✔✔subcutaneous layer, mostly adipose tissue
1
100% Pass Guarantee Katelyn Whitman, All Rights
, What gives us our skin color? - ✔✔melanin - yellow to reddish-brown to
black pigments give diversity to skin colors
What are the four appendages of the skin? - ✔✔hairs and hair follicles,
nails, sweat glands and oil glands
What is the function of the hair appendage? - ✔✔alerting the body to the
presence of insects on skin, guarding scalp against trauma, heat loss and
sunlight
What is the function of the nails appendage? - ✔✔protect the end of
fingers/toes from injury, allow ability to pick up objects, support tips
What is the function of the sweat glands appendage? - ✔✔apocrine -
sexually stimulated scent glands, eccrine - most common sweat gland,
thermoregulation, mammary glands in females secrete milk (modified
apocrine)
What are the functions of skin? - ✔✔Protection, body temperature
regulation, cutaneous sensation, metabolic functions, blood reservoir,
excretion
2
100% Pass Guarantee Katelyn Whitman, All Rights
