5. Integumentary System

Skin Color 

Skin

How We Get Our Skin Color | HHMI BioInteractive Video

 stratum granulosum, stratum corneum, stratum lucidum, stratum spinosum, and stratum basale 

 In thick skin, the cell layers, ordered from deep to superficial, are the following: stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum. 

 stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum 

 stratum corneum, stratum lucidum, stratum spinosum, stratum granulosum, and stratum basale 

 stratum basale, stratum granulosum, stratum corneum, stratum spinosum, and stratum lucidum 

 stratum spinosum, stratum lucidum, stratum corneum, stratum basale, and stratum granulosum 

 Which of the following is the correct sequence of epidermal layers of thick skin, from deep to superficial? 

 Melanin forms a protective layer that screens out a portion of the sun's cancer-causing UV rays. 

 to provide protection against the sun's UV rays 

 What is the primary function of melanin? 

 Sunburn is typically a first-degree burn. A first-degree burn involves only the epidermis. A second-degree burn results in damage to the epidermis and the upper region of the dermis. A third-degree burn involves the entire thickness of the skin. 

 A sunburn is generally classified as being __________. 

 stratum lucidum, stratum corneum, stratum granulosum, stratum spinosum, stratum basale 

The epidermis is made of five layers. From deep to superficial, these layers are the following: the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and the stratum corneum. (Study tip: Try the pneumonic BSGLC: Betty's Skin Glows Like Candles.)

 stratum granulosum, stratum lucidum, stratum corneum, stratum basale, stratum spinosum 

 stratum spinosum, stratum basale, stratum lucidum, stratum corneum, stratum granulosum 

 stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum 

 Which of following lists the correct order of the layers of the epidermis in thick skin from deep to superficial? 

 Melanin, synthesized by melanocytes in the deepest layer of the epidermis, is present in several varieties, ranging from yellow to reddish to brown to black. 

 What is the only pigment synthesized in the skin? 

Rule of Nines for Burns in Adults

The Science of Skin Color - Angela Koine Flynn

The Integumentary System- Skin Deep

 A uniformly colored mole that has been on the skin for 10 years and is now shrinking in size. 

 The ABCD rule can be used to check skin growths. Benign growths exhibit symmetry, regular borders, uniform coloration, and they are usually less than 6 millimeters in size.  

 A small, perfectly round, uniformly red freckle. 

 A spot with varying colors and irregular borders. 

 A uniformly tan mole that is 2 millimeters in diameter. 

 What type of mole or pigmented spot on the skin would be the most concerning? 

Skin, Clinical observations

 This layer is dead and does not require nutrients. 

 The dermis has a supply of capillaries. 

 The hypodermis does not rely on underlying connective tissue for its nutrient supply. 

 Which of the following layers of skin is avascular and relies on capillaries in the underlying connective tissue to provide nutrients? 

Changes in skin color and appearance, clinical significance

Function of the Skin

 Melanin absorbs and dissipates the harmful UV rays that can damage the DNA of your skin cells. Keratin is a fibrous protein that helps to protect skin from abrasion. 

 Keratin protects the skin from the damaging effects of ultraviolet (UV) radiation. 

The Integumentary System

 Although the skin functions in protection, excretion, preventing unnecessary water loss, and the regulation of body temperature, respiratory gas exchange is a function of the respiratory system. 

 Which of the following is NOT a function of the skin? 

Skin Cancer: Basal, Squamous Cell Carcinoma, Melanoma, Actinic Keratosis

 Cancer of the melanocytes (melanoma) is the most dangerous type of skin cancer since it is resistant to chemotherapy and it readily spreads (metastasizes). Melanoma accounts for only 2â€“3% of skin cancers. 

 it is the most common type of skin cancer 

 Melanoma is particularly dangerous because __________. 

Anatomy | The Three Types of Skin Cancers

 First-degree burns are not considered critical because they typically heal in a few days without any special attention. 

 third-degree burns on over 10% of the body 

 third-degree burns on the feet or hands 

 Which of the following are NOT considered critical burns? 

 The hypodermis acts as an insulator because it contains a substantial quantity of adipose tissue. 

 Adipose tissue is concentrated in which of the following layers? 

Integumentary System

 The deeper reticular layer, which accounts for about 80% of the thickness of the dermis, is composed of dense irregular connective tissue. 

 The reticular layer of the dermis is composed of which tissue type? 

 The stratum lucidum appears in thick skin, but it is not visible as a distinct layer in thin skin. 

 Which of the following strata is NOT visible as a distinct layer in thin skin? 

 A hypodermic needle would first pass through the superficial layer of the skin, the epidermis. It would then pass through the two layers of the dermis, the papillary layer and the reticular layer, before penetrating the hypodermis. 

 An injection is administered through the skin using a hypodermic needle. Identify the first integumentary structure through which the needle will pass. 

 Melanoma is caused by cancerous melanocytes, which are located in the stratum basale. 

 Basal cell carcinoma affects the stratum basale. 

 What type of skin cancer affects cells of the stratum spinosum? 

 The superficial layer of the skin, the epidermis, is composed of thick keratinized stratified squamous epithelium. 

 keratinized stratified squamous epithelial tissue 

 The epidermis is composed of which of the following tissues? 

 From deep to superficial, the main regions of the skin are the dermis and the epidermis. Deep to the skin is the hypodermis. 

 The region deep to the skin is the __________. 

 in thin skin, the stratum lucidum appears to be absent 

 The stratum lucidum is visible only in thick skin.  

 in thin skin, the stratum corneum appears to be absent 

 One main difference between thin skin and thick skin is that __________. 

Microscopic Appearance of Stratified Squamous Epithelium

 The hypodermis, deep to the skin, shares some of the skin's functions, but it is not a part of the integumentary system. 

 Which of the following is NOT strictly a component of the integumentary system? 

 The superficial stratum corneum is many cell layers thick, much thicker than any other epidermal layer. 

 Which of the following thick skin strata is the thickest? 

The Integumentary System - Skin Deep

Skin structure

 Intraderm is not an embryonic germ layer. 

 Periderm is not an embryonic germ layer. 

 None of the integumentary layers develop from endoderm. 

 The dermis and hypodermis develop from embryonic mesoderm. 

 The epidermis develops from which embryonic germ layer? 

Structure and Function of the Skin 

 As is typical with connective tissue, the dermis possesses mast cells, fibroblasts, macrophages, and scattered white blood cells. 

 Which of the following cells would NOT be present in the dermis? 

Learn the toughest concepts covered in Anatomy & Physiology 1&2 with step-by-step video tutorials and practice problems by world-class tutors

