30 Questions
Which layer of the epidermis is avascular and impermeable to water?
Stratum corneum
What is the primary function of Langerhans cells in the epidermis?
Act as immune cells
Which type of cells in the epidermis are responsible for synthesizing the protein keratin?
Keratinocytes
Where is the stratum lucidum found in the epidermis?
Fingertips and palms
Which layer of the epidermis contains melanocytes?
Stratum basale
What is the primary function of Merkel cells in the epidermis?
Sensory perception
Keratinization is a process where keratinocytes produce keratin. Which layer of the epidermis is primarily involved in this process?
Stratum granulosum
What is the function of Langerhans cells in the epidermis?
Signal the immune system of an infection
Which cells produce melanin in the skin?
Melanocytes
What is the primary role of Merkel cells in the epidermis?
Act as touch receptors
Which layer of the epidermis contains rapidly dividing cells?
Stratum basale
What is the process by which living epidermal cells transform into flattened dead cells of the stratum corneum?
Keratinization
Which layer of the epidermis contains diamond-shaped cells called granular cells?
Stratum granulosum
"Guard" cells that patrol the epidermis and are sensitive to sun exposure are known as:
"Langerhans" cells
What is the main difference between the epidermis and the dermis?
The epidermis wears away, unlike the dermis.
Which layer of the dermis contains glycosaminoglycans (GAGs)?
Papillary dermis
What are rete pegs responsible for in the skin?
Binding the epidermis and dermis together
What is the main function of blood vessels in the dermis?
Transporting oxygen and nutrients to the skin
Which component is NOT found in the dermis?
Melanocytes
What is the role of glycosaminoglycans (GAGs) in the skin?
Regulating moisture and appearance of skin surface
Which structures create fingerprints on our skin?
Epidermal ridges
Which skin component secretes sebum to lubricate the skin and hair?
Sebaceous glands
What is the function of sweat glands located over the whole surface of the skin?
Regulate body temperature by evaporating from the skin surface
Where are sebaceous glands found in the skin?
In the hair follicles to lubricate the skin and hair
Which type of gland produces wax to protect the ear by trapping small particles?
Wax glands
How many sweat glands are present in an average human body?
~ 2-5 million, abundant on palms and soles
Which skin component is responsible for transmitting sensations such as touch, pain, and heat intensity to the brain?
Sensory receptors
What is the primary function of Lymphatic ducts in skin tissue?
Fight microbes with white blood cells of the immune system in lymph
Which component of the skin plays a key role in regulating body temperature by transporting water to the skin's surface for evaporation?
Sweat glands
Where do sensory receptors transmit sensations like touch, pain, and heat intensity?
To the brain
Test your knowledge on the different layers of the epidermis and the role of keratinocytes in skin renewal. Learn about specialized cells like Langerhans cells and basal cells in the epidermis.
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