Unit 4 HW10_ Skin

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Unit 4 HW10: Skin Due: 11:59pm on Monday, November 6, 2023 You will receive no credit for items you complete after the assignment is due. Grading Policy Lab Manual Exercise 7 Pre-Lab Question 2 Part A The most superficial layer of the epidermis is the __________. ANSWER: Correct Lab Manual Exercise 7 Pre-Lab Question 3 Part A These cells produce a brown-to-black pigment that colors the skin and protects DNA from ultraviolet radiation damage. The cells are __________. ANSWER: Correct Lab Manual Exercise 7 Pre-Lab Question 4 Part A The portion of a hair that projects from the scalp surface is known as the __________. ANSWER: stratum basale stratum granulosum stratum corneum stratum spinosum melanocytes tactile cells dendritic cells keratinocytes bulb shaft matrix root
Correct Lab Manual Exercise 7 Pre-Lab Question 5 Part A The ducts of __________ glands usually empty into a hair follicle but may also open directly on the skin surface. ANSWER: Correct Lab Manual Exercise 7 Pre-Lab Question 9 Part A Nails originate from the epidermis. ANSWER: Correct Art-based Question Exercise 7 Question 1 Part A Which layer is composed primarily of dense irregular connective tissue? sweat sebaceous True False
ANSWER: Correct Layer C consists primarily of dense, interwoven fibers of collagen designed to resist tearing from any direction. Art-based Question Exercise 7 Question 2 Part A Layers B and C collectively form the __________. ANSWER: A B C D
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Correct Although layers B and C can be distinguished based on their structural components, they form a continuous layer of the skin termed the dermis . Art-based Question Exercise 7 Question 3 Part A Layer B is composed primarily of __________. ANSWER: Correct The loose connective tissue within the papillary layer of the dermis is rich in blood vessels and cells that function in the body's defenses. Art-based Question Exercise 7 Question 4 Part A Which of the following terms describes layer D? hypodermis dermis subcutaneous layer epidermis dense regular connective tissue dense irregular connective tissue areolar connective tissue simple squamous epithelium
ANSWER: Correct The hypodermis ("under the skin") layer is also referred to as the subcutaneous region. Art-based Question Exercise 7 Question 11 Part A What is the most common cell type in the epidermis? ANSWER: epidermal papillary subcutaneous reticular
Correct Keratinocytes are the primary cells that form the stratified layers of the epidermis. Art-based Question Exercise 7 Question 12 Part A Cell division would be most common among cells in which of the labeled layers? ANSWER: Correct Cells migrate upwards through the epidermis after being generated by mitosis in the stratum basale. Art-labeling Activity: Figure 7.2a-b Label the main structural features in the epidermis of thin skin. Part A Drag the labels onto the diagram to identify the main structural features in the epidermis of thin skin. ANSWER: fibroblasts dendritic cells keratinocytes macrophages A B C D
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Correct Exercise 7 Post-Lab Question 3 Part A This layer of the epidermis contains translucent cells filled with keratin fibrils. It is found only in thick skin. ANSWER: Help Reset Stratum basale Keratinocytes Melanocyte Tactile (Merkel) cell Stratum granulosum Stratum corneum Stratum spinosum Dermis Dendritic cell
Correct Exercise 7 Post-Lab Question 12 Part A This layer of the dermis is responsible for fingerprints. ANSWER: Correct Exercise 7 Pre-Lab Question 4 Part A From deep to superficial, the layers of the epidermis of thin skin are ________. ANSWER: Correct Exercise 7 Pre-Lab Question 5 stratum lucidum stratum corneum stratum basale stratum granulosum stratum spinosum papillary layer areolar layer deep stratum basale reticular layer stratum corneum, stratum granulosum, stratum spinosum, stratum basale stratum granulosum, stratum spinosum, stratum corneum, stratum basale stratum spinosum, stratum basale, stratum corneum, stratum granulosum stratum basale, stratum spinosum, stratum granulosum, stratum corneum
Part A The cells in this layer of epidermis are dead, and their flat, scale-like remnants are filled with keratin. ANSWER: Correct Exercise 7 Pre-Lab Question 6 Part A Pressure receptors, called lamellar (Pacinian) corpuscles, are located in this layer of the integument. ANSWER: Correct Exercise 7 Pre-Lab Question 7 Part A What is true about the blood supply to the skin? ANSWER: Correct stratum spinosum stratum corneum stratum granulosum stratum basale epidermal stratum spinosum epidermal stratum basale dermal reticular layer dermal papillary layer Both epidermis and dermis are poorly vascularized. Epidermis is richly vascularized and dermis is avascular. Both epidermis and dermis are richly vascularized. Epidermis is avascular and dermis is richly vascularized.
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Exercise 7 Post-Lab Question 1 Part A The ________ is the structure responsible for goose bumps. ANSWER: Correct Art-based Question Exercise 7 Question 9 Part A Which structure is a type of sweat gland? ANSWER: Correct Structure C is an eccrine gland, the most abundant type of sweat (sudoriferous) gland. Exercise 7 Pre-Lab Question 11 sebaceous gland hair follicle lamellar corpuscle arrector pili A B C D
Part A These glands are found all over the skin except in the palms of the hands and soles of the feet. They produce an oily substance that lubricates skin and hair. ANSWER: Correct PAL: Models > Integumentary System > Quiz > Question 1 Part A Which structure is highlighted? ANSWER: Correct apocrine sweat glands sebaceous glands eccrine sweat glands endocrine glands hair root sudoriferous gland hair bulb arrector pili muscle
PAL: Models > Integumentary System > Quiz > Question 2 Part A Which structure is highlighted? ANSWER: Correct PAL: Models > Integumentary System > Quiz > Question 4 Part A papillary layer of dermis Meissner's corpuscle stratum corneum duct of eccrine gland
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Which structure is highlighted? ANSWER: Correct PAL: Models > Integumentary System > Quiz > Question 8 Part A hair root hair papilla hair shaft hair follicle
Identify the layer indicated in the figure above. ANSWER: Correct PAL: Models > Integumentary System > Quiz > Question 12 Part A epidermis papillary layer of dermis hypodermis reticular layer of dermis
What percentage of the dermis is composed of the highlighted tissue type? ANSWER: Correct PAL: Models > Integumentary System > Quiz > Question 13 Part A 80% 100% 10% 50%
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What is secreted by the highlighted structure? ANSWER: Correct PAL: Models > Integumentary System > Quiz > Question 14 Part A sweat mucus sebum cerumin
Which layer is highlighted? ANSWER: Correct PAL: Histology > Integumentary System > Quiz > Question 3 Part A stratum basale stratum spinosum stratum lucidum stratum granulosum
Which structure is highlighted? ANSWER: Correct PAL: Histology > Integumentary System > Quiz > Question 6 Part A Which structure is highlighted? ANSWER: basement membrane dermal papilla basal lamina stratum basale
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Correct PAL: Histology > Integumentary System > Quiz > Question 5 Part A Which region of the skin is highlighted? ANSWER: Correct PAL: Histology > Integumentary System > Quiz > Question 9 Part A sebaceous duct arrector pili blood vessels eccrine duct hypodermis reticular layer of dermis epidermis papillary layer of dermis
Which structure is highlighted? ANSWER: Correct PAL: Histology > Integumentary System > Quiz > Question 17 Part A Which structure is highlighted? ANSWER: melanocytes fibroblast nuclei mast cells keratinocyte nuclei
Correct PAL: Histology > Integumentary System > Quiz > Question 19 Part A What type of tissue is highlighted? ANSWER: Correct PAL: Histology > Integumentary System > Quiz > Question 20 Part A blood vessel Pacinian corpuscle (lamellar corpuscle) eccrine sweat gland Meissner's corpuscle (tactile corpuscle) simple cuboidal epithelium stratified cuboidal epithelium stratified squamous epithelium columnar epithelium
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Which type of tissue is the highlighted region composed of? ANSWER: Correct Score Summary: Your score on this assignment is 72.7%. You received 72.73 out of a possible total of 100 points. stratum corneum stratified squamous epithelium, keratinized stratum spinosum dermis
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