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AN31.1-5 | Orbit — Practice Quiz
Practice
10 questions · Untimed · Unlimited attempts
Click any question card to reveal the correct answer.
Thick skin is found on the palms and soles. Which of the following is a characteristic feature of thick skin?
A
Presence of hair follicles
B
A very thick epidermis with no hair follicles
✓
C
A thin epidermis with abundant sebaceous glands
D
Absence of sweat glands
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A patient presents with a painful, blistering rash that follows a band-like pattern wrapping around the right side of the chest. The most likely explanation for this distribution is:
A
The rash follows an arterial territory
B
The rash follows a dermatome — the skin zone of one spinal nerve
✓
C
The rash follows a lymphatic drainage pattern
D
The distribution is random
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Which layer of the skin is avascular (has no blood vessels) and depends on diffusion for nutrition?
A
Dermis
B
Epidermis
✓
C
Hypodermis
D
Superficial fascia
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Melanocytes in the epidermis produce melanin. What determines the difference in skin colour between individuals?
A
The number of melanocytes varies greatly between races
B
The amount and type of melanin produced varies, not the number of melanocytes
✓
C
Darker skin has melanocytes in the dermis instead of the epidermis
D
Skin colour depends only on blood vessel density in the dermis
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In which of the following locations is subcutaneous fat (superficial fascia) absent?
A
Abdomen
B
Buttocks
C
Eyelids
D
Scrotum
✓
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A nurse selects the abdomen for a subcutaneous insulin injection rather than the back of the hand. The primary reason is:
A
The abdomen has thicker epidermis
B
The abdomen has thicker superficial fascia with more subcutaneous fat for drug absorption
✓
C
The abdomen has fewer nerves, making it less painful
D
The abdomen has no dermatomes, preventing referred pain
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Deep fascia divides the limbs into compartments. In compartment syndrome after a fracture, what causes the damage to muscles and nerves?
A
The fracture directly cuts the muscles and nerves
B
Swelling inside a rigid fascial compartment compresses blood vessels and nerves
✓
C
The deep fascia contracts and strangles the muscles
D
Loss of superficial fascia removes cushioning around the nerves
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Retinacula are modifications of deep fascia. Their function is to:
A
Store subcutaneous fat
B
Hold tendons in place at joints, preventing bowstringing
✓
C
Produce synovial fluid for joint lubrication
D
Connect the epidermis to the dermis
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A plastic surgeon planning a facial incision wants to minimise visible scarring. The incision should be made:
A
Perpendicular to Langer's lines for maximum tissue exposure
B
Parallel to Langer's lines for minimal wound gaping
✓
C
In any direction — facial skin heals without visible scars
D
At 45 degrees to Langer's lines as a standard compromise
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Langer's lines represent the predominant direction of which structural component in the dermis?
A
Elastic fibres
B
Collagen fibre bundles
✓
C
Keratinocyte alignment
D
Blood vessel orientation
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