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Multiple Choice
Which of the following correctly identifies the structure responsible for the secretion of sweat in merocrine (eccrine) sweat glands?
A
Langerhans cell in the stratum spinosum
B
Secretory coil located in the deep dermis or hypodermis
C
Sebaceous gland attached to a hair follicle
D
Apical surface of keratinocytes in the epidermis
Verified step by step guidance
1
Understand the function of merocrine (eccrine) sweat glands: These glands are responsible for thermoregulation by secreting sweat directly onto the skin surface. They are not associated with hair follicles, unlike sebaceous glands.
Identify the structural components of merocrine sweat glands: These glands consist of a secretory portion (secretory coil) and a duct that leads to the skin surface. The secretory coil is located in the deep dermis or hypodermis.
Eliminate incorrect options: Langerhans cells are immune cells found in the stratum spinosum and are not involved in sweat secretion. Sebaceous glands secrete sebum, not sweat, and are associated with hair follicles. The apical surface of keratinocytes in the epidermis is not a structure responsible for sweat secretion.
Focus on the correct structure: The secretory coil in the deep dermis or hypodermis is the part of the merocrine sweat gland responsible for producing sweat. This sweat is then transported through the duct to the skin surface.
Conclude that the correct answer is the 'Secretory coil located in the deep dermis or hypodermis,' as it matches the description of the structure responsible for sweat secretion in merocrine sweat glands.