BIO 201 Exam 2 MCC Csikar UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Functions of the skin - CORRECT ANSWER - Protect, regulate body temp, and provide
sensory information
The two layers of the skin are - CORRECT ANSWER - epidermis and dermis
What cells are found in the epidermis? - CORRECT ANSWER - keratinocytes,
melanocytes, langerhans cells, merkel cells
Two major regions of the dermis - CORRECT ANSWER - papillary region and reticular
region
Function of dermal papilla - CORRECT ANSWER - Anchors epidermis to dermis,
contains capillaries that feed epidermis, contains meissener's corpuscles for sensation of heat,
cold, touch
What are epidermal ridges? - CORRECT ANSWER -
into what layer is tattoo ink placed? - CORRECT ANSWER - Injected into dermis
What is jaundice/cause? - CORRECT ANSWER - yellowish color to skin and whites of
eye, build up of yellow bilirubin in blood from liver disease
What is cyanosis? - CORRECT ANSWER - a bluish discoloration of the skin or nail beds
resulting from poor circulation or inadequate oxygenation of the blood.
, What is erythema? - CORRECT ANSWER - redness of skin due to enlargement of
capillaries in dermis
How and where is melanin produced? - CORRECT ANSWER - melanin produced in
epidermis by melanocytes, melanocytes convert tyrosine to melanin
What causes freckles? - CORRECT ANSWER - uneven and localized accumulations of
melanocytes
What causes albinism? - CORRECT ANSWER - enzyme defect that impairs melanin
production (usually tyrosinase), no pigment
What causes vitiligo? - CORRECT ANSWER - Autoimmune destruction of melanocytes
what three things cause the range of skin colors? - CORRECT ANSWER - The wide
variety of colors in skin is due to three pigments - melanin, carotene, and hemoglobin (in blood
in capillaries) in the dermis.
What are the different types of melanin? - CORRECT ANSWER -
what are the two main selection pressures for the evolution of skin pigmentation? - CORRECT
ANSWER - protect folate from UVA (important for cell division and DNA repair) and
make enough Vitamin D via UVB (important for calcium absorption)
What is rickets? - CORRECT ANSWER - defective mineralization of both bone and
growth plate cartilage
what is the function of the arrector pili muscle? - CORRECT ANSWER - smooth muscle
in dermis that contracts with cold or fear (goosebumps)
ACTUAL Exam Questions and CORRECT
Answers
Functions of the skin - CORRECT ANSWER - Protect, regulate body temp, and provide
sensory information
The two layers of the skin are - CORRECT ANSWER - epidermis and dermis
What cells are found in the epidermis? - CORRECT ANSWER - keratinocytes,
melanocytes, langerhans cells, merkel cells
Two major regions of the dermis - CORRECT ANSWER - papillary region and reticular
region
Function of dermal papilla - CORRECT ANSWER - Anchors epidermis to dermis,
contains capillaries that feed epidermis, contains meissener's corpuscles for sensation of heat,
cold, touch
What are epidermal ridges? - CORRECT ANSWER -
into what layer is tattoo ink placed? - CORRECT ANSWER - Injected into dermis
What is jaundice/cause? - CORRECT ANSWER - yellowish color to skin and whites of
eye, build up of yellow bilirubin in blood from liver disease
What is cyanosis? - CORRECT ANSWER - a bluish discoloration of the skin or nail beds
resulting from poor circulation or inadequate oxygenation of the blood.
, What is erythema? - CORRECT ANSWER - redness of skin due to enlargement of
capillaries in dermis
How and where is melanin produced? - CORRECT ANSWER - melanin produced in
epidermis by melanocytes, melanocytes convert tyrosine to melanin
What causes freckles? - CORRECT ANSWER - uneven and localized accumulations of
melanocytes
What causes albinism? - CORRECT ANSWER - enzyme defect that impairs melanin
production (usually tyrosinase), no pigment
What causes vitiligo? - CORRECT ANSWER - Autoimmune destruction of melanocytes
what three things cause the range of skin colors? - CORRECT ANSWER - The wide
variety of colors in skin is due to three pigments - melanin, carotene, and hemoglobin (in blood
in capillaries) in the dermis.
What are the different types of melanin? - CORRECT ANSWER -
what are the two main selection pressures for the evolution of skin pigmentation? - CORRECT
ANSWER - protect folate from UVA (important for cell division and DNA repair) and
make enough Vitamin D via UVB (important for calcium absorption)
What is rickets? - CORRECT ANSWER - defective mineralization of both bone and
growth plate cartilage
what is the function of the arrector pili muscle? - CORRECT ANSWER - smooth muscle
in dermis that contracts with cold or fear (goosebumps)
