Textbook Question
What are the functions of the dermal papillae?
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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 10
Epidermal ridges are created by:
a. The epidermal papillae
b. Mounds of papillary dermis arranged into dermal ridges
c. Gaps between collagen bundles in the reticular layer
d. Tight binding of the reticular layer to deeper structures
Verified step by step guidance1
Understand the structure of the skin: The skin consists of two main layers, the epidermis (outer layer) and the dermis (inner layer). The dermis is further divided into the papillary layer (upper portion) and the reticular layer (lower portion).
Learn about dermal ridges: Dermal ridges are formed by the arrangement of the papillary layer of the dermis. These ridges push up into the epidermis, creating the patterns known as epidermal ridges (e.g., fingerprints).
Focus on the papillary dermis: The papillary dermis contains mounds of connective tissue that form dermal ridges. These ridges are responsible for the patterns seen on the surface of the skin.
Eliminate incorrect options: a) Epidermal papillae is not a term used to describe the structures forming epidermal ridges. c) Gaps between collagen bundles in the reticular layer do not contribute to epidermal ridges. d) Tight binding of the reticular layer to deeper structures is unrelated to ridge formation.
Select the correct answer: The correct explanation is that epidermal ridges are created by mounds of papillary dermis arranged into dermal ridges, which push up into the epidermis.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Epidermal Ridges
Epidermal ridges are the raised patterns on the surface of the skin, commonly known as fingerprints. They are formed by the interaction between the epidermis and the underlying dermis, specifically through the arrangement of dermal papillae, which project into the epidermis, creating these unique patterns.
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07:02
Other Epidermal Cells
Dermal Papillae
Dermal papillae are small, nipple-like projections of the dermis that extend into the epidermis. They play a crucial role in enhancing the surface area for exchange of nutrients and waste, and they also contribute to the formation of epidermal ridges, influencing the unique patterns found on fingertips.
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06:141st Dermal Layer
Reticular Layer of the Dermis
The reticular layer is the deeper layer of the dermis, composed of dense irregular connective tissue that provides strength and elasticity to the skin. It contains collagen and elastin fibers, which help anchor the dermis to underlying structures, but it is primarily the papillary layer that interacts with the epidermis to form ridges.
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01:20Introduction to the Dermis
Related Practice
Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Tactile cells produce the pigment melanin.
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Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
The primary skin pigment is melanin, which is derived from the amino acid tyrosine.
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Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Melanin is produced by melanocytes and covers the nuclei of neighboring dendritic cells.
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Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Carotene is a brown-black pigment that accumulates in the stratum corneum.
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Textbook Question
Which of the following statements is false?
a. Thin skin lacks the stratum lucidum, whereas thick skin has all five epidermal layers.
b. Thick skin is located on the palms, the palmar surfaces of the fingers, the soles of the feet, and the plantar surface of the toes, whereas thin skin is located everywhere else.
c. Thick skin has numerous hairs, whereas thin skin lacks hairs.
d. Thin skin has a thin stratum corneum, and the other layers are thinner than what we find in thick skin.
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