Skin and Its Appendages Quiz

What is the main function of the skin?

• Transport of oxygen

• Digestion of food

• Hearing sounds

• Regulation of body temperature

Which layer of the skin is formed mainly of keratinized stratified squamous epithelial cells?

• Papillary dermis

• Hypodermis

• Epidermis

• Dermis

What is the function of melanocytes in the skin?

• Formation of vitamin D

• Production of sweat

• Regulation of body temperature

• Synthesis of melanin

Which layer of the epidermis is formed of many layers of flattened diamond-shaped cells with flat nuclei?

• Stratum granulosum

• Stratum spinosum

• Stratum corneum

• Stratum lucidum

What is the main function of sebaceous glands in the skin?

• Lubrication and bactericidal

• Excretion of excess water and salts

• Regulation of body temperature

• Protection against UV radiation

Which type of receptors in the skin are sensitive to pressure and vibration?

• Non-encapsulated free nerve endings

• Plexus of Bounet

• Pacinian corpuscles

• Merkel's disc

What is the embryonic origin of the epidermis?

• Ectoderm

• Mesoderm

• Epiderm

• Endoderm

Which layer of the skin is rich in cells and loops of blood capillaries?

• Papillary dermis

• Reticular dermis

• Epidermis

• Hypodermis

What is the dynamic process that keratinocytes undergo in the skin?

• Keratinization

• Collagen synthesis

• Melanization

• Fibroblastic activity

Which cells are responsible for constant renewal of other keratinocytes in the epidermis?

• Stratum granulosum cells

• Stratum germinativum cells

• Stratum spinosum cells

• Stratum corneum cells