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Questions and Answers
What is the name of the complex, oily mixture of lipids secreted by sebaceous glands?
What is the name of the complex, oily mixture of lipids secreted by sebaceous glands?
Sebum
What type of secretion is sebum production an example of?
What type of secretion is sebum production an example of?
Holocrine secretion
Which of the following are components of the apocrine glands? (Select all that apply)
Which of the following are components of the apocrine glands? (Select all that apply)
- Merocrine exocytosis
- Secretory simple cuboidal and eosinophilic cells (correct)
- Simple cuboidal, eosinophilic cells with numerous secretory granules that show merocrine, not apocrine, secretion
- Granules that are similar to those of the numerous secretory granules that also show merocrine, not apocrine, secretion (correct)
Apocrine sweat glands are largely confined to skin of the axillary and perineal regions.
Apocrine sweat glands are largely confined to skin of the axillary and perineal regions.
The development of apocrine glands depends on sex hormones and is not complete until after puberty.
The development of apocrine glands depends on sex hormones and is not complete until after puberty.
The ducts of apocrine glands are similar to those of the eccrine glands, but they usually open into hair follicles at the epidermis.
The ducts of apocrine glands are similar to those of the eccrine glands, but they usually open into hair follicles at the epidermis.
The slightly viscous secretion is initially odorless but may acquire a distinctive odor as a result of bacterial activity.
The slightly viscous secretion is initially odorless but may acquire a distinctive odor as a result of bacterial activity.
Apocrine sweat glands are innervated by cholinergic nerve endings.
Apocrine sweat glands are innervated by cholinergic nerve endings.
Cystic fibrosis (CF) is a genetic disease that commonly affects infants with cystic fibrosis.
Cystic fibrosis (CF) is a genetic disease that commonly affects infants with cystic fibrosis.
What is the type of transmembrane conductance regulator (CFTR) defect in cells that lead to disruptive accumulations of thick mucus in the respiratory and digestive tracts?
What is the type of transmembrane conductance regulator (CFTR) defect in cells that lead to disruptive accumulations of thick mucus in the respiratory and digestive tracts?
Failure to remove salt from sweat is related to the same genetic defect as cystic fibrosis.
Failure to remove salt from sweat is related to the same genetic defect as cystic fibrosis.
What is the process of cutaneous wound healing, whether initiated surgically or accidentally, exposed and easily damaged organ?
What is the process of cutaneous wound healing, whether initiated surgically or accidentally, exposed and easily damaged organ?
During the first phase with the size of the wound what happens?
During the first phase with the size of the wound what happens?
What happens during the second phase of wound healing?
What happens during the second phase of wound healing?
Flashcards
Sebaceous Glands
Sebaceous Glands
Glands that secrete sebum, an oily substance released into hair follicles, via holocrine secretion.
Sebum
Sebum
An oily mixture of lipids secreted by sebaceous glands.
Holocrine Secretion
Holocrine Secretion
A type of secretion where the entire cell disintegrates to release its product.
Apocrine Sweat Glands
Apocrine Sweat Glands
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Eccrine Sweat Glands
Eccrine Sweat Glands
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CF Sweat
CF Sweat
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Cystic Fibrosis (CF)
Cystic Fibrosis (CF)
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CFTR
CFTR
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Skin Repair
Skin Repair
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Wound Healing
Wound Healing
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Blood Coagulation
Blood Coagulation
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Growth Factors & Chemokines
Growth Factors & Chemokines
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Neutrophils
Neutrophils
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Macrophages
Macrophages
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Myoepithelial Cells
Myoepithelial Cells
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Study Notes
Sebaceous Glands
- Secrete sebum, a complex oily mixture of lipids
- Sebum is released into hair follicles
- Sebaceous glands use holocrine secretion, where the entire cell dies and contributes to the product.
- Sebaceous glands are made up of sebocytes
- Sebocytes undergo terminal differentiation filling with lipids and then disintegrating near the ducts.
Eccrine Sweat Glands
- Function as auxiliary excretory organs
- Eliminate nitrogenous waste and excess salts
- Located throughout the skin
- Their development is not complete until puberty
- Composed of simple cuboidal, eosinophilic cells with numerous secretory granules
- Secrete a watery fluid through merocrine secretion.
Apocrine Sweat Glands
- Primarily in axillary and perineal regions
- Dependent on sex hormones for development
- Their secretory components are larger than eccrine glands
- Composed of simple cuboidal cells
- Secrete a slightly viscous fluid
- May contain proteins and pheromones
- Their ducts usually open into hair follicles
- Secrete via merocrine method
Medical Application of Sweat Glands
- Infants with cystic fibrosis (CF) often have salty sweat
- CF is a genetic disease affecting transmembrane conductance regulator (CFTR) in epithelial cells
- CF leads to mucus build-up in respiratory and digestive tracts
- Failure to remove salt from sweat is linked to the same genetic defect in CF.
Skin Repair
- Skin has a good capacity for repair.
- The process of wound healing is multi-stage.
- The first stage involves blood clotting
- Platelets releases growth factors and chemokines
- Neutrophils and macrophages remove bacteria and debris.
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