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WorksheetsPHYL 141 - Chapter 5
Total questions: 10
Worksheet time: 7mins
Write True or False: The integumentary system is composed of skin, hair, oil and sweat glands, nails and sensory receptors.
(a)
As newly formed cells of the stratum basale are pushed to the surface, they accumulate keratin and undergo apoptosis. This process is referred to as ________.
Germination
Perspiration
Granulation
Keratinization
The epidermis and dermis differ in: (Select all that apply.)
Presence of sensory receptors
Types of cells present
Vascularization
Viability of cells
Which of the following statements about a hair is FALSE?
Consists of a shaft, root, and a hair follicle.
The root of a hair penetrates the dermis.
The arrector pili muscle is responsible for “goose bumps”.
The hair matrix contains cells that are undergoing apoptosis.
Write True or False: A nail consists of a free edge, a nail body which is the visible part of the nail and the lunula which is covered by the eponychium.
(a)
Which of the following substances can NOT penetrate the skin?
Oxygen and carbon dioxide
Water soluble substances
Organic solvents like acetone
Fat soluble substances
Write True or False: Stimulation of neurons in the skin gives rise to tactile sensations, thermal sensations, and pain.
(a)
Write True or False: Epidermal wound healing doesn’t result in scar formation because wound edges have only superficial damage and basal cells quickly enlarge and migrate to cover the wound.
(a)
Which structures develop as downgrowths of the stratum basale?
vernix caseosa
hair buds
primary nail field
ectoderm
With aging, the size of sebaceous glands decreases. Why might this be problematic?
This may result in dry, broken skin and increase likelihood of infection
This may result in a decrease in Langerhans cell number
This may result in inability to thermoregulate and increase likelihood of heat-related illnesses
This may result in oily skin and increase likelihood of falls and accidents
