Skin and Its Appendages Quiz

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Questions and Answers

What law protects the copyright of the material?

Intellectual Property Act

Republic Act RA 8294

Republic Act RA 8293 (correct)

Who prepared the material for students?

The University's Copyright Office

The Faculty of the Department of Medical Laboratory Science (correct)

The University's Intellectual Property Office

The College of Allied Medical Professions

What is the purpose of the material?

For distribution to the general public

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

For intellectual property law studies

For research purposes

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

Study Notes

Copyright Law

The text does not specify the copyright law protecting the material.

Material Preparation

The text does not specify who prepared the material.

Material Purpose

The material aims to educate students about the integumentary system.

Reproduction Consequences

Reproducing or communicating the material without permission is prohibited, but specific consequences are not mentioned.

Material Preparation Year

The text does not specify the year the material was prepared.

Integument Origin

The word "integument" originates from the Latin word "integumentum," meaning "covering."

Integumentary System Function

One function of the integumentary system is to protect the body from environmental hazards.

Skin Pigment Purpose

Skin pigments in the integumentary system help protect against harmful UV radiation.

Individual Identification & Skin

The skin's unique pattern of ridges and folds, known as fingerprints, contributes to individual identification.

Skin Weight Percentage

The skin accounts for approximately 16% of an adult's body weight.

Skin Thickness Range

The skin's thickness varies depending on location, ranging from 0.5 mm to 4 mm.

Stratum Corneum Function

The stratum corneum, the outermost layer of the epidermis, acts as a barrier, protecting against water loss and microorganisms.

Epidermis Cell Layer Name

The layer of the epidermis consisting of a single layer of columnar or cuboidal cells is called the stratum basale.

Epidermis Cell Type

Keratinocytes, comprising approximately 90% of epidermal cells, produce keratin, a fibrous protein.

Keratinocyte Protein Mixture

The protein mixture produced by keratinocytes is called keratin.

Epidermis Layer with Granules

The stratum granulosum, a layer of the epidermis, contains numerous fine grains and lamellar granules.

Melanocyte Function

Melanocytes, pigment-producing cells in the epidermis, produce melanin, a pigment that contributes to skin color and protects against UV radiation.

Nail Function

The primary function of the nail is to protect the distal end of the finger and enhance gripping ability.

Nail Plate Crescent Shape

The lunula, the crescent-shaped white part of the nail plate, is where nail growth begins.

Sebaceous Gland Location

Sebaceous glands are usually located near hair follicles.

Hyponychium Purpose

The hyponychium, the thickened skin beneath the free edge of the nail, protects the nail bed from injury.

Nail Root Embedding

The nail root, the portion of the nail hidden under the skin, is embedded in the nail fold.

Sebaceous Gland Characteristic

A typical sebaceous gland is a branched alveolar gland that secretes sebum, an oily substance.

Tyrosinase Role

Tyrosinase, an enzyme, plays a crucial role in melanin synthesis by catalyzing the conversion of tyrosine to melanin.

Langerhans Cell Function

Langerhans cells, immune cells found in the epidermis, help initiate immune responses against antigens that penetrate the skin.

Merkel Cell Location

Merkel cells, touch receptors, are typically located in the stratum basale, the deepest layer of the epidermis.

Lower Reticular Layer Component

The lower reticular layer, the deeper layer of the dermis, consists mainly of dense, irregular connective tissue.

Upper Papillary Layer Function

The upper papillary layer, the more superficial layer of the dermis, provides nourishment to the epidermis and houses sensory receptors.

Lower Reticular Layer Feature

The lower reticular layer is characterized by its dense network of collagen and elastin fibers, which provide strength and elasticity to the skin.

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Description

Test your knowledge of the skin and its appendages, covering topics such as anatomy, physiology, and related concepts. This quiz is designed for students of Lyceum of the Philippines University- Batangas. Evaluate your understanding of the skin and its appendages with this interactive quiz.