Textbook Question
Explain what happens to dermal blood vessels when heat needs to be conserved (i.e., due to a cold environment).
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Ch. 5 The Integumentary System
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814
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Table of contents
- Ch. 1 Introduction to Anatomy and Physiology24
- Ch. 2 The Chemistry of Life37
- Ch. 3 The Cell54
- Ch. 4 Histology46
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System35
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System41
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomic Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart28
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity41
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814Not the one you use?Change textbook
Chapter 5, Problem L3.A3a
Nguyen comes to your clinic with a mole that has recently changed in appearance. You examine the mole and note that its borders are irregular, it has a deep blue-black color, and the color is unevenly distributed throughout the mole.
What is your immediate concern? Why?
Verified step by step guidance1
Step 1: Begin by identifying the key characteristics of the mole described in the problem. These include irregular borders, deep blue-black color, and uneven color distribution. These features are clinically significant and should raise concern.
Step 2: Recall the ABCDE criteria for evaluating moles, which are commonly used to assess potential melanoma. The criteria include: A - Asymmetry, B - Border irregularity, C - Color variation, D - Diameter greater than 6mm, and E - Evolving changes in size, shape, or color.
Step 3: Compare the mole's features to the ABCDE criteria. Irregular borders and uneven color distribution align with the 'B' and 'C' criteria, while the deep blue-black color may indicate abnormal pigmentation. These findings suggest the mole could be suspicious for melanoma.
Step 4: Consider the urgency of the situation. Melanoma is a type of skin cancer that can spread rapidly if not treated early. The described changes in the mole's appearance are concerning and warrant immediate medical evaluation.
Step 5: Recommend the next steps for Nguyen. Advise a biopsy or referral to a dermatologist for further examination and diagnostic testing to confirm whether the mole is malignant. Early detection and treatment are critical for improving outcomes.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Melanoma
Melanoma is a type of skin cancer that develops from melanocytes, the cells responsible for producing melanin, which gives skin its color. It is known for its aggressive nature and potential to metastasize, making early detection crucial. The characteristics of moles, such as irregular borders and uneven color, are key indicators of melanoma, necessitating immediate medical evaluation.
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Map of the Lesson on Integumentary System
ABCDE Rule
The ABCDE rule is a guideline for identifying the warning signs of melanoma. It stands for Asymmetry, Border irregularity, Color variation, Diameter greater than 6mm, and Evolving changes. Each of these criteria helps in assessing moles for potential malignancy, and the presence of irregular borders and uneven color in Nguyen's mole raises significant concern for melanoma.
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Skin Examination
A skin examination is a thorough assessment of the skin to identify any abnormalities, such as moles or lesions that may indicate skin cancer. This process involves visual inspection and may include dermatoscopy for a more detailed view. In Nguyen's case, the examination reveals critical features that warrant immediate concern and further investigation to rule out malignancy.
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Related Practice
Textbook Question
Would a mild second-degree burn be likely to heal by regeneration or fibrosis? Would the same type of healing take place in a third-degree burn that involved muscle tissue? Why or why not?
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Textbook Question
The disease pemphigus vulgaris involves a patient's own immune system attacking the desmosomes between the epithelial cells of the skin. What changes would you expect to see with this disease?
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Textbook Question
Number the strata of thick skin epidermis from deepest (1) to most superficial (5).
____Stratum spinosum
____Stratum corneum
____Stratum basale
____Stratum lucidum
____Stratum granulosum
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Textbook Question
Many antiaging skin creams contain collagen and hyaluronic acid. Manufacturers claim that the collagen and hyaluronic acid applied to the surface of the skin will be absorbed into the dermis, where they will be incorporated into dermal tissue.
Predict whether or not these substances are likely to be absorbed by the epidermis.
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Textbook Question
Keratinocytes in the superficial strata of the epidermis die because:
a. They are too far away from the blood supply in the dermis.
b. They are surrounded by a lipid-based substance that makes them more permeable to water.
c. They do not die.
d. No keratinocytes in the epidermis are alive.
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