Epidermis Structure and Function

The video tutorial explains the integumentary system, focusing on the skin's layers: epidermis, dermis, and hypodermis. It details the epidermis's five layers: stratum corneum, lucidum, granulosum, spinosum, and basale, highlighting their functions and characteristics. The tutorial uses acronyms and analogies to aid memory, such as 'come let's get sunburnt' for the epidermis layers. It also discusses the roles of specific cells like keratinocytes, Langerhans cells, and melanocytes in skin protection and function.

Which layers make up the skin?

• Epidermis and hypodermis

• Dermis and hypodermis

• Hypodermis and subcutaneous

• Epidermis and dermis

What is the correct order of the epidermis layers from superficial to deep?

• Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum

• Stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale

• Stratum granulosum, stratum corneum, stratum lucidum, stratum spinosum, stratum basale

• Stratum lucidum, stratum corneum, stratum granulosum, stratum spinosum, stratum basale

What type of cells are found in the stratum corneum?

• Dead keratinocytes

• Merkel cells

• Living keratinocytes

• Melanocytes

What is the primary function of the stratum corneum?

• To protect against infection and water loss

• To provide flexibility

• To sense light touch

• To produce melanin

Where is the stratum lucidum primarily found?

• On the back

• On the palms and soles

• On the face

• On the arms

What is unique about the stratum granulosum?

• It contains living keratinocytes

• It is the thickest layer

• It contains Merkel cells

• It is only found in thick skin

What is the main function of desmosomes in the stratum spinosum?

• To sense light touch

• To create a water barrier

• To produce melanin

• To provide cell adhesion and flexibility

Which cells in the stratum basale are responsible for light touch sensation?

• Melanocytes

• Keratinocytes

• Merkel cells

• Langerhans cells

What is the primary role of melanocytes in the stratum basale?

• To produce keratin

• To produce melanin

• To provide cell adhesion

• To sense light touch

In which layer does mitosis primarily occur?

• Stratum corneum

• Stratum lucidum

• Stratum basale

• Stratum granulosum