BIOS251 Anatomy & Physiology I Exam 2 - Integumentary, Skeletal,
and Articular Systems Questions and Answers and Explanations |
Latest Chamberlain
1. Which layer of the epidermis is only found in thick skin, such as the palms and
soles?
A. Stratum basale
B. Stratum spinosum
C. Stratum lucidum
D. Stratum corneum
Answer: C
Explanation: Stratum lucidum is a thin, transparent layer of keratinocytes found only in
the thick skin of the fingertips, palms, and soles.
2. Which cell type in the epidermis is responsible for producing the pigment that
protects against UV radiation?
A. Keratinocytes
B. Melanocytes
C. Merkel cells
D. Langerhans cells
Answer: B
,Explanation: Melanocytes produce melanin, a pigment that absorbs UV light to protect the
nucleus of keratinocytes.
3. The papillary layer of the dermis is composed primarily of which type of
tissue?
A. Dense irregular connective tissue
B. Adipose tissue
C. Stratified squamous epithelium
D. Areolar connective tissue
Answer: D
Explanation: The papillary layer is the superficial layer of the dermis, consisting of loose
areolar connective tissue.
4. What is the primary function of sebaceous glands?
A. To produce sweat for thermoregulation
B. To produce earwax
C. To produce milk
D. To secrete an oily substance that lubricates the skin and hair
Answer: D
Explanation: Sebaceous glands secrete sebum, an oily substance that helps waterproof and
lubricate the skin and hair.
, 5. Which of the following is the most lethal form of skin cancer?
A. Malignant melanoma
B. Squamous cell carcinoma
C. Basal cell carcinoma
D. Actinic keratosis
Answer: A
Explanation: Malignant melanoma is the most aggressive and lethal form of skin cancer
due to its high tendency to metastasize.
6. Fingerprints are caused by which structural feature of the skin?
A. Dermal papillae and epidermal ridges
B. Cleavage lines
C. Flexure lines
D. Subcutaneous fat
Answer: A
Explanation: Epidermal ridges are formed by the underlying dermal papillae, creating the
unique patterns known as fingerprints.
7. Which vitamin is synthesized by the skin when exposed to UV light?
A. Vitamin D
B. Vitamin C
C. Vitamin A
and Articular Systems Questions and Answers and Explanations |
Latest Chamberlain
1. Which layer of the epidermis is only found in thick skin, such as the palms and
soles?
A. Stratum basale
B. Stratum spinosum
C. Stratum lucidum
D. Stratum corneum
Answer: C
Explanation: Stratum lucidum is a thin, transparent layer of keratinocytes found only in
the thick skin of the fingertips, palms, and soles.
2. Which cell type in the epidermis is responsible for producing the pigment that
protects against UV radiation?
A. Keratinocytes
B. Melanocytes
C. Merkel cells
D. Langerhans cells
Answer: B
,Explanation: Melanocytes produce melanin, a pigment that absorbs UV light to protect the
nucleus of keratinocytes.
3. The papillary layer of the dermis is composed primarily of which type of
tissue?
A. Dense irregular connective tissue
B. Adipose tissue
C. Stratified squamous epithelium
D. Areolar connective tissue
Answer: D
Explanation: The papillary layer is the superficial layer of the dermis, consisting of loose
areolar connective tissue.
4. What is the primary function of sebaceous glands?
A. To produce sweat for thermoregulation
B. To produce earwax
C. To produce milk
D. To secrete an oily substance that lubricates the skin and hair
Answer: D
Explanation: Sebaceous glands secrete sebum, an oily substance that helps waterproof and
lubricate the skin and hair.
, 5. Which of the following is the most lethal form of skin cancer?
A. Malignant melanoma
B. Squamous cell carcinoma
C. Basal cell carcinoma
D. Actinic keratosis
Answer: A
Explanation: Malignant melanoma is the most aggressive and lethal form of skin cancer
due to its high tendency to metastasize.
6. Fingerprints are caused by which structural feature of the skin?
A. Dermal papillae and epidermal ridges
B. Cleavage lines
C. Flexure lines
D. Subcutaneous fat
Answer: A
Explanation: Epidermal ridges are formed by the underlying dermal papillae, creating the
unique patterns known as fingerprints.
7. Which vitamin is synthesized by the skin when exposed to UV light?
A. Vitamin D
B. Vitamin C
C. Vitamin A
