Podcast
Questions and Answers
Keratinocytes of the epidermis are usually present for about ___ weeks.
Keratinocytes of the epidermis are usually present for about ___ weeks.
4
The major functions of merocrine sweat glands are ___ (Select all that apply).
The major functions of merocrine sweat glands are ___ (Select all that apply).
- Protection (correct)
- Secretion (correct)
- Vitamin production
- Thermoregulation (correct)
In thin and thick skin, the layers that contain living cells are the stratum ___, stratum ___, and stratum ___.
In thin and thick skin, the layers that contain living cells are the stratum ___, stratum ___, and stratum ___.
basale, spinosum, granulosum
Sebaceous glands produce a ___ material that coats hair shafts and the epidermal surface.
Sebaceous glands produce a ___ material that coats hair shafts and the epidermal surface.
Women often accumulate subcutaneous fat in the ___ (Select all that apply).
Women often accumulate subcutaneous fat in the ___ (Select all that apply).
The visible part of each nail consists of two parts: a pinkish nail ___, which appears pink because of blood flowing through underlying ___, and the distal whitish free ___.
The visible part of each nail consists of two parts: a pinkish nail ___, which appears pink because of blood flowing through underlying ___, and the distal whitish free ___.
The epidermis lacks which of the following? (Select all that apply)
The epidermis lacks which of the following? (Select all that apply)
The acidic pH of merocrine sweat helps prevent the growth of some pathogenic bacteria.
The acidic pH of merocrine sweat helps prevent the growth of some pathogenic bacteria.
The whitish semilunar area of the proximal end of the nail body is called the ___.
The whitish semilunar area of the proximal end of the nail body is called the ___.
Sebaceous glands are activated primarily by ___ during puberty in both sexes.
Sebaceous glands are activated primarily by ___ during puberty in both sexes.
Many cells in the epidermis produce ___ when exposed to UV radiation (Select all that apply).
Many cells in the epidermis produce ___ when exposed to UV radiation (Select all that apply).
Classify the tissue type of epidermis: keratinized ___ ___ epithelium.
Classify the tissue type of epidermis: keratinized ___ ___ epithelium.
A hemangioma is a congenital anomaly that results in skin discoloration due to ___ that proliferate and form a benign tumor.
A hemangioma is a congenital anomaly that results in skin discoloration due to ___ that proliferate and form a benign tumor.
The reason the cells of the stratum spinosum have a spiny appearance when viewed under a microscope is due to the shrinkage of the ___ during slide presentation while the intercellular attachments called ___ and cytoskeletal elements remain intact.
The reason the cells of the stratum spinosum have a spiny appearance when viewed under a microscope is due to the shrinkage of the ___ during slide presentation while the intercellular attachments called ___ and cytoskeletal elements remain intact.
During the process of keratinization, the ___ and organelles of the cells disintegrate, and the cell starts to die. Also, their membranes become thicker and less ___ to water.
During the process of keratinization, the ___ and organelles of the cells disintegrate, and the cell starts to die. Also, their membranes become thicker and less ___ to water.
Among the stimuli detected by the sensory receptors of the skin are ___? (Select all that apply)
Among the stimuli detected by the sensory receptors of the skin are ___? (Select all that apply)
Which is a possible description of the skin's form and function? (Select all that apply)
Which is a possible description of the skin's form and function? (Select all that apply)
In children, which hair type is the primary human hair and is found on most of the body?
In children, which hair type is the primary human hair and is found on most of the body?
Merocrine sweat glands are classified as ___ glands that release their secretion into the surface of the skin.
Merocrine sweat glands are classified as ___ glands that release their secretion into the surface of the skin.
Friction ridges are located on the skin in four regions of the body: ___, ___, ___, and toes.
Friction ridges are located on the skin in four regions of the body: ___, ___, ___, and toes.
The main functions of the subcutaneous layers are which of the following? (Select all that apply)
The main functions of the subcutaneous layers are which of the following? (Select all that apply)
The color of hair is the result of?
The color of hair is the result of?
Normal skin color results from a combination of factors, mainly pigments called ___, ___, and ___.
Normal skin color results from a combination of factors, mainly pigments called ___, ___, and ___.
Cold can result in blood vessel ___ in the dermis to ___ blood flow, which allows the body to conserve heat.
Cold can result in blood vessel ___ in the dermis to ___ blood flow, which allows the body to conserve heat.
Tactile cells are described best by which of the following? (Select all that apply)
Tactile cells are described best by which of the following? (Select all that apply)
Study Notes
Keratinocytes and Skin Layers
- Keratinocytes in the epidermis have a lifespan of about 4 weeks.
- Living cell layers in thin and thick skin include the stratum basale, stratum spinosum, and stratum granulosum.
Sweat and Sebaceous Glands
- Major functions of merocrine sweat glands include secretion, thermoregulation, and protection.
- Sebaceous glands produce an oily material that coats hair shafts and the epidermal surface.
- Activation of sebaceous glands during puberty is primarily driven by sex hormones.
Subcutaneous Fat Distribution
- Women commonly accumulate subcutaneous fat in the breasts and buttocks.
Nail Structure
- Visible parts of nails consist of the pinkish nail body (due to underlying capillaries) and the white distal free edge (lacking capillaries).
- The proximal end of the nail body features a whitish semilunar area called the lunula.
Epidermis Characteristics
- The epidermis lacks adipose tissue, collagen fibers, and blood vessels.
- It is classified as keratinized stratified squamous epithelium.
Responses to UV Radiation
- Exposure to UV radiation leads to the production of vitamin D3 and cholecalciferol in skin cells.
Skin and Sensory Receptors
- Hemangiomas result from the proliferation of blood vessels, causing skin discoloration.
- Sensory receptors in the skin detect stimuli such as vibration, cold, and pressure.
Skin Functions
- The skin serves as an indicator of health, is self-renewing, and functions as a barrier.
- Main functions of subcutaneous layers include acting as an energy reservoir, protecting the body, and providing thermal insulation.
Hair Types and Color
- Vellus hair is the primary hair type present on children's bodies.
- Hair color results from melanin production, and normal skin color is influenced by melanin, carotene, and hemoglobin.
Blood Flow and Temperature Regulation
- Cold conditions cause blood vessel contraction in the dermis, reducing blood flow to help conserve heat.
Tactile Cells
- Tactile cells, also known as Merkel cells, play a crucial role in the sensation of touch.
Studying That Suits You
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Description
Test your knowledge with these flashcards covering Chapter 6 of Anatomy & Physiology. The questions focus on epidermis, sweat glands, and skin layers, helping you to solidify your understanding of the material. Perfect for students preparing for exams!
