anatomy section 4.1-4.3

Which of the following is NOT a component of the skin but considered an accessory structure?

hair

Which of the following is the most abundant epithelial cell found in the epidermis?

keratinocyte

Of the following factors, UV radiation in sunlight is absorbed by _________.

melanin

The deeper layer of the dermis, composed of dense irregular connective tissue, is the __________.

reticular layer

Which layer of the epidermis is the most superficial layer in which all of the cells still have a nucleus?

stratum granulosum

In which epidermal layer are Langerhans cells and melanocytes often present?

stratum spinosum

Exceeding the elastic capabilities of the skin results in:

stretch marks

Which of the following is a function of the integument?

- Excretion - Thermoregulation - Nutrition

Which of the following is considered a function of the integumentary system?

- function in immune defense - Regulate body temperature - serve as a physical barrier

Which layer of the cutaneous membrane produces vitamin D3?

Epidermis

Which structure is located in the dermis of the skin and protrudes through the epidermis to the surface of the skin?

Multicellular exocrine glands

The dermis contains, in addition to all of the cells of connective tissue proper, which of the following structures?

Nerve Fibers Lymph Vessels Blood Vessels

What structure in the skin controls blood flow, adjusts gland secretion rates, and monitors sensory receptors in the dermis and the deep layers of the epidermis?

Nerve fibers

Place the following structures of the dermis and subcutaneous layer in order from superficial to deep. 1.papillary layer 2.adipocytes 3.dermal papillae 4.cutaneous plexus 5.reticular layer

3. dermal papillae 1. papillary layer 5. reticular layer 4. cutaneous plexus 2. adipocytes

Put the following epidermal layers in order from deep to superficial. 1.stratum spinosum 2.stratum lucidum 3.stratum corneum 4.stratum basale 5.stratum granulosum

4. stratum basale 1. stratum spinosum 5. stratum granulosum 2. stratum lucid 3. stratum corneum

Which of the following statements regarding the blood supply to the skin is FALSE?

Both; Arteries and veins supplying the skin form an interconnected network in the subcutaneous layer, along the border with the papillary layer AND upon reaching the reticular layer, small arteries enter a branching network known as the subpapillary plexus.

Which cell type functions in initiating an immune response against pathogens invading the epidermis?

Langerhans cells

All of the following are true of skin color, except:

Reduction in circulatory supply to the dermis has no effect on skin color

Which stratum forms epidermal ridges?

Stratum basale

Which epidermal layer is water resistant, but not waterproof, and is typically relatively dry?

Stratum corneum

Which epidermal layer is only found in thick skin?

Stratum lucidum

The interwoven collagen fibers of the dermal layer provide considerable tensile strength. The extensive array of elastic fibers that enables the dermis to stretch and recoil repeatedly during normal movements is found in the __________.

reticular layer

Which of the following are components of the integumentary system?

skin, hair, nails, and sweat glands