The Skin Flashcards
How many layers does the skin have?
2
Epidermis
Dermis
How many layers does the Epidermis have?
5
The innermost layer of the Epidermis is called?
Stratum Basale
Merkel cells are found in what layer of the Epidermis?
The Stratum Basale
Melanocytes are found in what layer of the Epidermis?
The Stratum Spinosum
The third layer of the Epidermis (from the bottom) is called?
Stratum Granulosum
What layer of the Epidermis is only found in thick parts of the skin?
Stratum Lucidum
The outermost layer of the Epidermis is called?
Stratum Corneum
Bacteria that live normally on the surface of the skin are referred to as __________
Commensal microorganisms
Mast cells are located in what part of the skin
The Dermis
Sebaceous glands secrete __________ to lubricate the skin
Sebum
What is the major difference between Apocrine sweat glands and Eccrine sweat glands?
Apocrine sweat glands open into the hair follicles and occur in areas with lots of hair.
Eccrine sweat glands open directly onto the skin’s surface and occur over most of the body.
____________ is a muscle that attaches to the hair follicle to control hair movement.
Arrector Pili muscle
The Dermis is otherwise called _________
True skin
The skin received _____ of cardiac output
⅓ of cardiac output
The skin is ______% waterproof
90
The skin is ____kg in weight
3
The skin covers __________ in diameter
9000cm²
The Dermis is divided into __________ and ____________ portions
Papillary
Reticular
What causes white hair in humans?
Absence of pigment and formation of air bubbles in hair shaft
What causes grey hair in humans?
Absence of pigment
Sebaceous gland secretion is under the control of the _______________ system
Endocrine
Sebaceous gland secretion increases at ________________ and decreases during _______________
Puberty
Late pregnancy
Sebaceous glands are absent in what parts of the body?
Palms and soles
Sweat is odourless
True/False
True
Odour in your sweat is due to the action of bacteria
