Human Anatomy (9th Edition)
9th Edition
ISBN: 9780134320762
Author: Frederic H. Martini, Robert B. Tallitsch, Judi L. Nath
Publisher: PEARSON
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Chapter 2, Problem 1CT
Summary Introduction
To review:
The reason for the shedding off of the skin cells simultaneously upon damage.
Introduction:
The outer layer of the skin is made up of epidermal cells. The epidermis is a self-renewing system. Old cells of the skin are shed off from the skin surface and replaced by the new cells known as keratinocytes. Keratinocytes are produced in the underlying epidermis and come outward to become “corneocytes.” When the skin is damaged from the sunburn peels, several epidermal cells shed off simultaneously.
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Which is not the function of the dermis layer?
A.
Regulates temperature by sweat glands and blood vessel dilation or constriction
B.
Responds to pressure, pain, and temperature with the use of sensory nerves
C.
Produces Vitamin D upon exposure to UV light
D.
Covers and protects the epidermis
E.
None of the above
In which layer of the epidermis do the nucleus and other organelles disintegrate and the cells die?
A.
Stratum granulosum
B.
Stratum basale
C.
Stratum lucidum
D.
Stratum corneum
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.
Chapter 2 Solutions
Human Anatomy (9th Edition)
Ch. 2 - Level 1 Reviewing Facts and Terms Match each...Ch. 2 - Prob. 2RFTCh. 2 - Level 1 Reviewing Facts and Terms Match each...Ch. 2 - Level 1 Reviewing Facts and Terms
Match each...Ch. 2 - Prob. 5RFTCh. 2 - Prob. 6RFTCh. 2 - Level 1 Reviewing Facts and Terms Match each...Ch. 2 - Match each numbered item with the most closely...Ch. 2 - Prob. 9RFTCh. 2 - All of the following membrane transport mechanisms...
Ch. 2 - Prob. 11RFTCh. 2 - Compared to the intracellular fluid, the...Ch. 2 - 13. Label the following organelles on the diagram...Ch. 2 - Prob. 14RFTCh. 2 - Prob. 15RFTCh. 2 - 16. Three major functions of the endoplasmic...Ch. 2 - 17. A selectively permeable plasma membrane
(a)...Ch. 2 - Prob. 18RFTCh. 2 - Identify the advantages a cell has because its...Ch. 2 - 2. Identify the three basic concepts that make up...Ch. 2 - 3. Identify the three passive processes by which...Ch. 2 - Compare and contrast facilitated diffusion and...Ch. 2 - Prob. 5RCCh. 2 - Prob. 6RCCh. 2 - 7. Name the stages of mitosis shown in this...Ch. 2 - Identify the four general functions of the plasma...Ch. 2 - Prob. 1CTCh. 2 - Experimental evidence demonstrates that in the...Ch. 2 - Solutions A and B are separated by a selectively...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which statement is NOT true of the epidermis? O A. Melanocytes produce melanin, which protects living skin layers from bacteria O B. Anunbroken stratum corneum prevents the entry of pathogens and many chemicals OC. The stratum corneum consists of keratinized dead cells that prevent the loss or entry of water O D. Mitosis takes place in the stratum basale, and new cells are pushed toward the skin surfacearrow_forwardCell division occurs in which layer of the epidermis? A. Stratum granulosum B. Stratum lucidum C. Stratum corneum D. Stratum basalearrow_forwardWhat causes "goose bumps" and hair on the skin to stand up? A. sebaceous glands B. connective tissue sheath C. the hair bulb D. arrector pili musclearrow_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_forwardDespite its apparent durability, the dermis is subject to tearing. How might a person know that the dermis has been previously stretched and/or torn? a.The appearance of visible, silvery-white scars is an indication of stretching of the dermis. b.The stretching causes the tension lines to disappear. c.The blood vessels in the dermis rupture and the blood passes through the tissue, causing permanent "black-and-blue marks." d.There is an episode of acute pain due to the large number of tactile corpuscles.arrow_forwardWhich cell is responsible for skin pigmentation? A. melanocytes B. Merkel's cells C. keratinized cells D. lucidium cellsarrow_forward
- Which statement about sebaceous glands is false? a. They release their secretion onto a hair follicle. b. They release their product by apocrine secretion. c. They are located in the dermis. d. The product they secrete acts as a lubricant and waterproofer.arrow_forwardWhat type of tissue makes up the dermis of the skin? A. loose irregular collective tissue B. dense regular connective tissue C. dense irregular connective tissue D. adipose tissuearrow_forwardWhich statement about integument tissues is NOT TRUE? Group of answer choices A. Turtle skin is actually under their shell B. Dermal layers are mostly comprised of connective tissue of various kinds C. arthropod cuticles are noncellular secretions D. feathers and hairs are made of cells E. Epidermal layers are an example of epithelial tissuearrow_forward
- The cells which are implicated in melanoma (skin cancer) are found in which layer? A. stratum corneum B. stratum granulosum C. stratum spinosum D. stratum basalearrow_forwardWhich type of sweat glands are found in the skin of the palms and soles? A. eccrine B. reticular C. endocrine D. apocrinearrow_forwardOur skin contains melanocytes, which produce melanin that protects the cells from sun damage. If darker- skinned people have more melanin does this mean that they do not have to protect their skin from the sun? Explain your answer.arrow_forward
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