These are all types of cells found in the epidermis, EXCEPT
fibroblast
stem cells
melanocytes
dendritic cells
keratinocytes
The Correct Answer is A
A. fibroblast: Fibroblasts are connective tissue cells found in the dermis, responsible for producing collagen and extracellular matrix. They are not located in the epidermis.
B. stem cells: Epidermal stem cells are located in the stratum basale and are responsible for continuously producing new keratinocytes to replace shed cells.
C. melanocytes: Melanocytes are pigment-producing cells found in the stratum basale of the epidermis, providing melanin to protect against UV damage.
D. dendritic cells: Dendritic cells, also called Langerhans cells, are immune cells in the epidermis that detect pathogens and participate in immune responses.
E. keratinocytes: Keratinocytes are the predominant cell type in the epidermis, producing keratin and forming the protective outer layer of the skin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. centromere:The centromere is the region of a chromosome where sister chromatids are tightly joined after DNA replication. It plays a critical role in ensuring proper alignment and separation of chromatids during cell division.
B. centrosome:The centrosome is an organelle that organizes microtubules and helps form the mitotic spindle during cell division. It is not responsible for holding sister chromatids together.
C. centriole:Centrioles are cylindrical structures within the centrosome that aid in spindle fiber formation. They assist in chromosome movement but do not act as the attachment site between sister chromatids.
D. kinetochore:The kinetochore is a protein complex assembled on the centromere that attaches to spindle fibers. It facilitates chromatid movement but is not the structure that holds sister chromatids together.
Correct Answer is B
Explanation
A. fibrocartilage CT:Fibrocartilage provides strong support and shock absorption in areas such as intervertebral discs and the pubic symphysis, but it is too rigid to maintain the flexible shape of the external ear.
B. elastic cartilage CT:Elastic cartilage contains a dense network of elastic fibers that provide both strength and flexibility. This allows the external ear (pinna) to maintain its shape while remaining pliable.
C. adipose tissue CT:Adipose tissue stores fat and cushions structures but does not provide the structural framework necessary to maintain the shape of the ear.
D. hyaline cartilage CT:Hyaline cartilage is found in structures such as the trachea and nose, providing support with limited flexibility. It is not elastic enough to preserve the shape of the external ear.
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