Microbiology with Diseases by Body System (5th Edition)
5th Edition
ISBN: 9780134477206
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Chapter 19, Problem 2MC
Summary Introduction
Introduction:
The second skin layer which is present below the outermost epidermal layer is known as the dermis. The dermis is made up of connective tissues like blood vessels, hair follicles, sebaceous glands among other structures. The dermis is consists of living tissues that provides nutrients to the epidermis. The dermis also helps in the regulation of heat loss and regulates the temperature of the skin.
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Melanocytes 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.
The epidermis is nourished by diffusion from capillaries in the ___________.
A.
hypodermis
B.
epidermis
C.
papillary layer of the dermis
D.
reticular layer of the dermis
Which of the following is NOT a component of the epidermis thin skin?
A.
Capillaries
B.
Keratinized cells
C.
Keratin
D.
Melanocytes
Chapter 19 Solutions
Microbiology with Diseases by Body System (5th Edition)
Ch. 19 - Prob. 1TMWCh. 19 - Prob. 2TMWCh. 19 - Buruli Ulcer Jacques liked living in the...Ch. 19 - A New Cause of Spots Fifty-two-year-old David has...Ch. 19 - Prob. 3TMWCh. 19 - A Painful Rash A mother brings her three-year-old...Ch. 19 - A Child with Warts Ten-year-old Rudy has several...Ch. 19 - Grandfathers Shingles The Davises were excited...Ch. 19 - Prob. 4TMWCh. 19 - Prob. 4CCS
Ch. 19 - Prob. 5TMWCh. 19 - Diagnosis in the Desert In the 1970s,...Ch. 19 - Prob. 6TMWCh. 19 - Prob. 3EDCSCh. 19 - The epidermis ____. a. has an intricate network of...Ch. 19 - Prob. 2MCCh. 19 - Prob. 3MCCh. 19 - Prob. 4MCCh. 19 - Prob. 5MCCh. 19 - Prob. 6MCCh. 19 - Prob. 7MCCh. 19 - Prob. 8MCCh. 19 - Prob. 9MCCh. 19 - Prob. 10MCCh. 19 - Prob. 11MCCh. 19 - Prob. 12MCCh. 19 - Prob. 13MCCh. 19 - Prob. 14MCCh. 19 - Prob. 15MCCh. 19 - Prob. 1MCh. 19 - Prob. 1FIBCh. 19 - Prob. 2FIBCh. 19 - Prob. 3FIBCh. 19 - Prob. 4FIBCh. 19 - Prob. 5FIBCh. 19 - Prob. 6FIBCh. 19 - Prob. 7FIBCh. 19 - Prob. 8FIBCh. 19 - Prob. 9FIBCh. 19 - Most pimples result from infection by ______ not...Ch. 19 - Prob. 1MTFCh. 19 - Prob. 2MTFCh. 19 - Prob. 3MTFCh. 19 - Prob. 4MTFCh. 19 - Prob. 5MTFCh. 19 - Prob. 1SACh. 19 - Prob. 2SACh. 19 - Considering that Pseudomonas aeruginosa and...Ch. 19 - Prob. 4SACh. 19 - Prob. 5SACh. 19 - Describe four enzymes produced by Staphylococcus,...Ch. 19 - Prob. 7SACh. 19 - Prob. 8SACh. 19 - Prob. 9SACh. 19 - Prob. 10SACh. 19 - Label each lesion seen in poxvirus infections.Ch. 19 - Prob. 2VICh. 19 - Prob. 3VICh. 19 - Prob. 1CTCh. 19 - Why is it more difficult to rid a community of a...Ch. 19 - Prob. 3CTCh. 19 - Prob. 4CTCh. 19 - Prob. 5CTCh. 19 - Most DNA viruses replicate within the nucleus of a...Ch. 19 - Prob. 7CTCh. 19 - Prob. 8CTCh. 19 - Prob. 9CTCh. 19 - Prob. 10CTCh. 19 - Prob. 11CTCh. 19 - Why do impetigo and erysipelas occur more commonly...Ch. 19 - Prob. 13CTCh. 19 - Prob. 14CTCh. 19 - Prob. 1CM
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- The strength of the dermis is mainly a result of the _____. A. presence of collagen fibers B. thickness of the layers C. keratinization of the skin D. distribution of elastic fibers E. amount of blood vesselsarrow_forwardMark 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 melaninarrow_forwardThe reason the hypodermis acts as a shock absorber is that...... a.it has no delicate nerve endings and can therefore absorb more shock. b. the major part of its makeup is adipose, which serves as an effective shock absorber. c.the cells that make up the hypodermis secrete a protective mucus. d.it is located just below the epidermis and protects the dermis from shock.arrow_forward
- Pigmentation of skin is due to: A. lymphocytes B. monocytes C. leucocytes D. melanocytesarrow_forwardThe papillary and reticular layers of the dermis arecomposed mainly of ________.a. melanocytesb. keratinocytesc. connective tissue d. adipose tissuearrow_forwardPaper 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_forward
- As 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_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_forwardMatch the following epidermal layer with the correct term. This layer is water resistant and A. Stratum germinativum or basale contains 20-30 layers of dead keratinized cells. Keratinocytes start producing B. Stratum Corneum keratin and keratohyalin here. By the time keratinocytes cells reach this layer, most would have stopped dividing. This glassy layer is present only C. Stratum Granulosum in thick skin (palms and soles). This layer contains keratinocytes D. Stratum Spinosum undergoing mitosis. Melanocytes and Merkel cells are found in this layer. This layer contains epidermal dendritic cells, also known as Langerhans cells. E. Stratum Lucidumarrow_forward
- How do melanocytes and keratinocytes work together to protect the skin from UV damage? a. Keratinocytes maintain the proper pH for melanocytes to synthesize melanin granules. b. Keratinocytes provide the melanocyte with nutrients critical for melanin synthesis. c. Keratinocytes maintain the appropriate temperature so the melanin will not denature. d. Keratinocytes accumulate melanin granules to shield the keratinocyte’s DNA.arrow_forwardSebaceous glands are located in the __________, are associated with the __________, and secrete ________. A. epidermis, hair follicle, sebum B. papillary layer, skin cells, oil C. dermis, nail bed, sebum D. dermis, hair follicle, sebum E. epidermis, hair follicle, oilarrow_forwardThe layer of the skin composed of dense connective tissue that has projections known as papillae is the ____________. A. stratum corneum B. stratum basale C. dermis D. hypodermisarrow_forward
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