Skin and Its Appendages Quiz

What law protects the copyright of the material?

Republic Act RA 8293

Who prepared the material for students?

The Faculty of the Department of Medical Laboratory Science

What is the purpose of the material?

For the use of students enrolled in Human Histology (MLS 202)

What will happen if the material is reproduced or communicated without permission?

Legal action may be taken Signup and view all the answers

What year was the material prepared for?

A.Y. 2022-2023 Signup and view all the answers

What is the origin of the word 'integument'?

From the Latin word integumentum, from integere, to cover Signup and view all the answers

What is one of the functions of the integumentary system?

Excretion of waste materials and waste products Signup and view all the answers

What is the purpose of skin pigments in the integumentary system?

To provide protection from the sun Signup and view all the answers

What is a characteristic of the skin in relation to individual identification?

It has shallow grooves and ridges Signup and view all the answers

What percentage of one's body weight does the skin approximately account for in adults?

15% of one's body weight Signup and view all the answers

What is the range of thickness of the skin depending on the location on the body?

0.5-5.0 mm Signup and view all the answers

What is the main function of the stratum corneum?

To provide a barrier against water and protect the skin Signup and view all the answers

What is the name of the layer of the epidermis that consists of a single layer of columnar or cuboidal cells?

Stratum basale Signup and view all the answers

What type of cells comprise approximately 90% of all epidermal cells?

Keratinocytes Signup and view all the answers

What is the name of the protein mixture produced by keratinocytes?

Keratin Signup and view all the answers

What is the name of the layer of the epidermis that contains numerous fine grains and lamellar granules?

Stratum granulosum Signup and view all the answers

What is the main function of melanocytes in the epidermis?

To produce melanin Signup and view all the answers

What is the primary function of the nail?

To grasp and manipulate small objects Signup and view all the answers

Which part of the nail plate is crescent-shaped and white?

Lunula Signup and view all the answers

Where are sebaceous glands usually located?

In the dermis and occasionally in the hypodermis Signup and view all the answers

What is the purpose of the hyponychium?

To provide protection against trauma to the distal ends of the digits Signup and view all the answers

What is the nail root embedded in?

Nail groove Signup and view all the answers

What is the characteristic of a typical sebaceous gland?

It has a short duct lined by stratified squamous epithelium Signup and view all the answers

What is the role of tyrosinase in melanin synthesis?

Catalyzing the conversion of tyrosine into DOPA Signup and view all the answers

What is the primary function of Langerhans cells?

Playing a crucial role in the immune response Signup and view all the answers

Where are Merkel cells typically located?

In the deepest regions of the epidermis Signup and view all the answers

What is the main component of the lower reticular layer?

Dense elastic fibers Signup and view all the answers

What is the function of the upper papillary layer?

Communicating with the central nervous system Signup and view all the answers

What is the characteristic feature of the lower reticular layer?

It contains many bundles of collagenous fibers Signup and view all the answers