5.2 Integumentary System Questions Flashcards
The hair shaft is the portion of the hair:
That one can see, this portion extends above the skin’s surface.
The hair root is the portion of the hair:
That lies below the skin’s surface in the hair follicle.
Hair grows by mitosis. TRUE or FALSE
True
The structure where hair is formed is called a hair __________.
Follicle
What two structures attach to hair follicles?
- Arrector pili muscles
- Sebaceous glands
Hair cells are keratinized (filled with keratin). TRUE or FALSE
TRUE
What is the function of keratin in hairs?
Give strength to hair
An individual with black or dark brown hair has what major chemical to give it that dark color?
Melanin
The major portion of the nail that is visible. Hint – women often paint these.
Nail body
The small portion of the nail that lies beneath the cuticle.
Nail root
What process occurs beneath the nail root?
Mitosis
The layer of stratum corneum of the epidermis that lies over the nail is called the:
Cuticle (eponychium)
The area of epidermis that lies beneath the nail body is called the:
Nail bed
The nail body is relatively transparent. So when the physician is looking at this area on a patient he/she is examining the color of the ____________ directly beneath to look for cyanosis.
Nail bed
Describe the growth of skin, nails and hair.
- All have a deep layer undergoing mitosis
- All new cells are pushed upward away from the layer of mitosis by newly formed cells.
- All three become keratinized and the cells die as they move away from their blood supply.
