Epidermis Layers Quiz

Melanocytes and Stratum Germinativum

• Melanocytes in the Stratum Germinativum primarily function to produce melanin, a pigment that provides color to the skin and protects against UV radiation.

Characteristics of Cells in the Stratum Spinosum

• Cells in the Stratum Spinosum have a spiny appearance due to desmosomal connections and provide structural support to the epidermis.

Production in the Stratum Granulosum

• The Stratum Granulosum produces keratohyalin granules, which are essential for the formation of keratin, contributing to the skin's barrier function.

Presence of Stratum Lucidum

• The Stratum Lucidum is primarily found in thick skin areas, such as the palms of the hands and soles of the feet.

Cells in the Stratum Granulosum

• In the Stratum Granulosum, cells begin to undergo keratinization, where they lose their nuclei and become more flattened as they accumulate keratin.

Epidermal Layer with Cuboidal or Columnar Cells

• The Stratum Germinativum is the layer of the epidermis consisting of a single layer of cuboidal or columnar cells, responsible for continuous cell division.

Shape of Cells in the Stratum Granulosum

• Cells in the Stratum Granulosum are polygonal in shape and appear more flattened compared to the layers beneath.

Purpose of Melanin

• The melanin produced by melanocytes in the Stratum Germinativum protects against damage from ultraviolet light and contributes to skin pigmentation.

Appearance of the Stratum Lucidum

• The Stratum Lucidum appears transparent because of the presence of dead keratinocytes, which have lost their nuclei and organelles.

Characteristics of Cells in the Stratum Granulosum

• Cells in the Stratum Granulosum show a loss of nuclei and accumulate keratin and lipid-rich substances, making them part of the skin's protective barrier.