ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
4th Edition
ISBN: 9781265521363
Author: McKinley
Publisher: MCG
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Chapter 6, Problem 6DYKB
Summary Introduction
Introduction:
Melanocytes are defines as the melanin-producing cells that are found in the stratum basale layer of epidermis along with the keratinocytes. These cells produce melanin pigment on exposure to sunlight.
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Mark the following statements as true or false. If a statement is false, correct it to make a true statement.a. Melanocytes account for the bulk of the epidermis. b. Keratinocytes begin life in the stratum corneum and gradually are pushed into the stratum basale. c. Dendritic cells are phagocytes of the immune system that protect the skin and deeper tissues from invasion by pathogens. d. Merkel cells produce the pigment melanin
Mark the following statements as true or false. If a statement is false, correct it to make a true statement. a. The primary skin pigment is melanin, which is derived from the amino acid tyrosine. b. Melanin is produced by melanocytes and covers the nuclei of neighboring dendritic cells. c. Carotene is a brown-black pigment that accumulates in the stratum corneum. d. Increased amounts of blood flowing through the dermis lead to pallor in the skin. e. Hemoglobin is a pigment found in red blood cells, and its color depends on the oxygen level of the blood.
Basal cell carcinomas are the most common form of skin cancers in the United States and are frequently found on the head, neck, and arms. This cancer affects which cells?
A. Langerhans cells of the stratum lucidum
B. keratinocytes of the stratum spinosum
C. melanocytes of the stratum basale
D. basal cells of the stratum basale
Chapter 6 Solutions
ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
Ch. 6.1 - As you trim your roses, a thorn penetrates your...Ch. 6.1 - Briefly describe the process of keratinization....Ch. 6.1 - Prob. 3WDYLCh. 6.1 - Prob. 4WDYLCh. 6.1 - Compare and contrast the papillary versus...Ch. 6.1 - What is indicated by the lines of cleavage in the...Ch. 6.1 - What types of tissue form the subcutaneous layer?Ch. 6.1 - How does the skin produce vitamin D?Ch. 6.1 - Is the skin entirely waterproof? Explain.Ch. 6.1 - Prob. 10WDYL
Ch. 6.2 - Prob. 11WDYLCh. 6.2 - What are the three zones of a hair?Ch. 6.2 - How does hair function in protection and heat...Ch. 6.2 - Prob. 14WDYLCh. 6.2 - What do sebaceous glands secrete, and where is...Ch. 6.3 - What is granulation tissue, and when does it...Ch. 6.4 - What two primary germ layers form the integument?Ch. 6.4 - How do UV rays contribute to skin aging?Ch. 6 - Prob. 1DYKBCh. 6 - _____ 2. The layer of the epidermis in which cells...Ch. 6 - _____ 3. The sweat glands that communicate with...Ch. 6 - _____ 4. Which of the following is not a function...Ch. 6 - Prob. 5DYKBCh. 6 - Prob. 6DYKBCh. 6 - Prob. 7DYKBCh. 6 - _____ 8. The cells in a hair follicle that are...Ch. 6 - Prob. 9DYKBCh. 6 - Prob. 10DYKBCh. 6 - Describe the composition of the layers of the...Ch. 6 - Prob. 12DYKBCh. 6 - Describe the tissue type and structure of the two...Ch. 6 - Prob. 14DYKBCh. 6 - Compare the structure and composition of the...Ch. 6 - Prob. 16DYKBCh. 6 - Where are ceruminous glands located, and what do...Ch. 6 - Discuss the steps involved in wound repair of the...Ch. 6 - Prob. 19DYKBCh. 6 - Prob. 20DYKBCh. 6 - Prob. 1CALCh. 6 - Prob. 2CALCh. 6 - Prob. 3CALCh. 6 - Prob. 1CSLCh. 6 - Prob. 2CSLCh. 6 - At the age of 50, John noticed that one of the...
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- Squamous cell carcinoma arises from: a. keratinocytes in stratum corneum. b. keratinocytes in stratum basale. c. keratinocytes in stratum spinosum. d. melanocytesarrow_forwardPigmentation of skin is due to: A. lymphocytes B. monocytes C. leucocytes D. melanocytesarrow_forwardMelanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes ________ a.maintain the appropriate pH in order for the melanocyte to synthesize melanin granules. b.provide the melanocyte with nutrients necessary for melanin synthesis. c.maintain the appropriate temperature so the product of the melanocyte will not denature. d.accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer.arrow_forward
- Which statement is accurate about melanin or melanocytes? a. Melanin is produced by cells that are located in the stratum spinosum. b. Melanin is a pigment that accumulates inside keratinocytes. c. Darker-skinned individuals have more melanocytes than lighter-skinned individuals. d. Albinism is caused by a lack of melanocytes in the body.arrow_forwardWhich of the following skin cells alert the immune system to pathogens?a. fibroblastsb. melanocytesc. keratinocytesd. dendritic cellse. tactile cellsarrow_forwardAs individuals age, the number of collagen fibers that are found in the dermis of the skin decreases. What are the results of decreased collagen fibers in the dermis? Select all that apply. A The skin loses firmness and becomes wrinkled B The skin develops necrosis and slowly begins to die. C The inflammation levels in the skin increase drastically. The wound healing process in the skin is slower.arrow_forward
- Paper cuts are often very painful but don't always bleed. What two properties of the skin explain this combination? A. the dermis is innervated, but the epidermis is not B. the epidermis is innervated C. the epidermis is avascular D. paper cuts only go as deep as the reticular dermis E. the epidermis and papillary dermis are avasculararrow_forwardWhich of the following associations is INCORRECT? A. Keratinocytes; found in the stratum spinosum B. Langerhans cells; immune cells C. Melanocytes; typically found in the stratum corneum D. Adipocytes; fat cells E. None of the abovearrow_forwardThe layer of the epidermis in which cells begin the process of keratinization is the a. stratum corneum. b. stratum basale. c. stratum lucidum. d. stratum granulosum.arrow_forward
- Cell division occurs in which layer of the epidermis? A. Stratum granulosum B. Stratum lucidum C. Stratum corneum D. Stratum basalearrow_forwardWhich of the following layers of the skin has projections of melanocytes? O A. Stratum basale O B. Stratum granulosum O C. Stratum lucidum O D. Stratum spinosumarrow_forwardWhich of the following statements about melanocytes and keratinocytes is true? a. Melanocytes are in the dermis and keratinocytes are in the epidermis b. Melanocytes produce pigment but keratinocytes do not. c. Both cell types produce waterproofing material. d. Both cell types divide and die as they move away from their blood supply.arrow_forward
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