BIOL227 Lab 4 Exam Questions and
Answers 100% Pass
integument - ✔✔skin
Epidermis - ✔✔The outermost layer of the skin this is avascular and composed of
stratified squamous epithelium with 4-5 layers
Stratum corneum - ✔✔The most superficial layer of the epidermis, constantly exfoliated
and replaced.
Stratum lucidum - ✔✔A layer found only in thick skin, such as the palms of the hands
and the soles of the feet.
Stratum granulosum - ✔✔A layer where cells begin to die in the epidermis.
Stratum spinosum - ✔✔A layer of uneven layers of cells in the epidermis.
Stratum basale - ✔✔The deepest layer of the epidermis where mitosis occurs, cells
receive nourishment, and a distinct border is formed.
functions of Keratinocytes - ✔✔produce keratin, structural support
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, Melanocytes - ✔✔Cells that produce melanin, influencing skin coloration and shielding
DNA from UV radiation.
Dendritic cells - ✔✔Cells responsible for phagocytosis, digesting infected cells in the
epidermis.
Dermis - ✔✔The underlying connective tissue of the skin that is dense irregular tissue
and contains various sensory receptors and accessory structures
Papillary layer - ✔✔The superficial layer of the dermis, composed of areolar connective
tissue, containing dermal papillae, friction ridges, and a capillary network.
Reticular layer - ✔✔The deeper layer of the dermis, made of dense irregular connective
tissue, collagen, elastic fibers, blood supply, and nerve fibers.
Hypodermis - ✔✔The subcutaneous tissue made up of adipose tissue, not considered
part of the skin.
Merocrine Sweat Glands - ✔✔Glands found all over the body that produce clear
perspiration for temperature regulation.
Apocrine Sweat Glands - ✔✔Glands found in axillary or genital areas that produce
merocrine sweat along with proteins and lipids.
Homeostasis - ✔✔The maintenance of optimal internal conditions, including
temperature, pH, and hydration, for the body's normal functioning.
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Answers 100% Pass
integument - ✔✔skin
Epidermis - ✔✔The outermost layer of the skin this is avascular and composed of
stratified squamous epithelium with 4-5 layers
Stratum corneum - ✔✔The most superficial layer of the epidermis, constantly exfoliated
and replaced.
Stratum lucidum - ✔✔A layer found only in thick skin, such as the palms of the hands
and the soles of the feet.
Stratum granulosum - ✔✔A layer where cells begin to die in the epidermis.
Stratum spinosum - ✔✔A layer of uneven layers of cells in the epidermis.
Stratum basale - ✔✔The deepest layer of the epidermis where mitosis occurs, cells
receive nourishment, and a distinct border is formed.
functions of Keratinocytes - ✔✔produce keratin, structural support
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, Melanocytes - ✔✔Cells that produce melanin, influencing skin coloration and shielding
DNA from UV radiation.
Dendritic cells - ✔✔Cells responsible for phagocytosis, digesting infected cells in the
epidermis.
Dermis - ✔✔The underlying connective tissue of the skin that is dense irregular tissue
and contains various sensory receptors and accessory structures
Papillary layer - ✔✔The superficial layer of the dermis, composed of areolar connective
tissue, containing dermal papillae, friction ridges, and a capillary network.
Reticular layer - ✔✔The deeper layer of the dermis, made of dense irregular connective
tissue, collagen, elastic fibers, blood supply, and nerve fibers.
Hypodermis - ✔✔The subcutaneous tissue made up of adipose tissue, not considered
part of the skin.
Merocrine Sweat Glands - ✔✔Glands found all over the body that produce clear
perspiration for temperature regulation.
Apocrine Sweat Glands - ✔✔Glands found in axillary or genital areas that produce
merocrine sweat along with proteins and lipids.
Homeostasis - ✔✔The maintenance of optimal internal conditions, including
temperature, pH, and hydration, for the body's normal functioning.
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