the integumentary system

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Which layer of the epidermis is avascular and impermeable to water?

Stratum granulosum

Stratum basale

Stratum spinosum

Stratum corneum (correct)

What is the primary function of Langerhans cells in the epidermis?

Produce melanin

Promote skin hydration

Produce keratin

Act as immune cells (correct)

Which type of cells in the epidermis are responsible for synthesizing the protein keratin?

Langerhans cells

Merkel cells

Keratinocytes (correct)

Melanocytes

Where is the stratum lucidum found in the epidermis?

Fingertips and palms Signup and view all the answers

Which layer of the epidermis contains melanocytes?

Stratum basale Signup and view all the answers

What is the primary function of Merkel cells in the epidermis?

Sensory perception Signup and view all the answers

Keratinization is a process where keratinocytes produce keratin. Which layer of the epidermis is primarily involved in this process?

Stratum granulosum Signup and view all the answers

What is the function of Langerhans cells in the epidermis?

Signal the immune system of an infection Signup and view all the answers

Which cells produce melanin in the skin?

Melanocytes Signup and view all the answers

What is the primary role of Merkel cells in the epidermis?

Act as touch receptors Signup and view all the answers

Which layer of the epidermis contains rapidly dividing cells?

Stratum basale Signup and view all the answers

What is the process by which living epidermal cells transform into flattened dead cells of the stratum corneum?

Keratinization Signup and view all the answers

Which layer of the epidermis contains diamond-shaped cells called granular cells?

Stratum granulosum Signup and view all the answers

"Guard" cells that patrol the epidermis and are sensitive to sun exposure are known as:

"Langerhans" cells Signup and view all the answers

What is the main difference between the epidermis and the dermis?

The epidermis wears away, unlike the dermis. Signup and view all the answers

Which layer of the dermis contains glycosaminoglycans (GAGs)?

Papillary dermis Signup and view all the answers

What are rete pegs responsible for in the skin?

Binding the epidermis and dermis together Signup and view all the answers

What is the main function of blood vessels in the dermis?

Transporting oxygen and nutrients to the skin Signup and view all the answers

Which component is NOT found in the dermis?

Melanocytes Signup and view all the answers

What is the role of glycosaminoglycans (GAGs) in the skin?

Regulating moisture and appearance of skin surface Signup and view all the answers

Which structures create fingerprints on our skin?

Epidermal ridges Signup and view all the answers

Which skin component secretes sebum to lubricate the skin and hair?

Sebaceous glands Signup and view all the answers

What is the function of sweat glands located over the whole surface of the skin?

Regulate body temperature by evaporating from the skin surface Signup and view all the answers

Where are sebaceous glands found in the skin?

In the hair follicles to lubricate the skin and hair Signup and view all the answers

Which type of gland produces wax to protect the ear by trapping small particles?

Wax glands Signup and view all the answers

How many sweat glands are present in an average human body?

~ 2-5 million, abundant on palms and soles Signup and view all the answers

Which skin component is responsible for transmitting sensations such as touch, pain, and heat intensity to the brain?

Sensory receptors Signup and view all the answers

What is the primary function of Lymphatic ducts in skin tissue?

Fight microbes with white blood cells of the immune system in lymph Signup and view all the answers

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 Signup and view all the answers

Where do sensory receptors transmit sensations like touch, pain, and heat intensity?

To the brain Signup and view all the answers