Week 7 Histology - Skin Flashcards
Where are Meissner’s corpuscles located? What is their function?
Located in the dermal papilla. Function is light touch and low frequency stimuli.
What type of skin is this? Name the layers.
Thin skin
- Stratum basale
- Stratum spinosum
- Stratum granulosum
- Stratum corneum
What type of skin is this? Name the layers
Thick skin
- Stratum basale
- Stratum spinosum
- Stratum granulosum
- Stratum lucidum
- Stratum corneum
What is that?
Scar
Identify the gland and how the secretory cells release their product.
Apocrine sweat gland (note the large ductal lumen) - release via merocrine secretion (exocytosis of product)
Identify the gland and how the secretory cells release their product. Where are the terminal ends of these glands located?
Eccrine gland - merocrine secretion, ducts empty onto skin surface
Identify the gland on the left and the gland on the right.
Eccrine on the left, apocrine on the right
What is the gland morphology of apocrine, eccrine, and sebaceous glands, respectively?
Apocrine: simple coiled tubular
Eccrine: simple coiled tubular
Sebaceous: simple branched acinar
What type of gland is this? By what mechanism is product released?
Sebaceous - holocrine secretion
ID it and describe their function
Meissner’s corpusles in the fingertips - for light touch, low frequency stimuli, pain, temp, and pH
ID it and describe its function.
Meissner’s corpuscle - for light touch, low frequency stimuli, pain, temp, and pH
ID
Melanocytes
ID it. Where in the integument are these found? What is their function?
Pacinian corpuscle - found deep in the reticular dermis and hypodermis. Sense coarse touch, pressure, and vibrations.
What structures in the epidermis sense pain and temperature?
Free nerve endings
In which layer of the integument are melanocytes found?
Cell bodies are just below the s. basale; pseudopodia reach up into the epidermis to give melanin to keratinocytes to shield their nuclei from UV damage.
