Chapter 6 - The Unity of Form and Function
the first step in synthesis of vitamin D begins in the skin - (correct Answer) - true
- starts off with the synthesis of vitamin D which is needed for bone development and maintenance. The
liver and kidneys complete the process.
living keratinocytes exfoliate from the epidermis as dander - (correct Answer) - false
- they exfoliate(flake off) from the epidermal surface as specks called dander. Dander - floats around as
tiny white specks (dust)
the hypodermis is the deeper of the 2 layers of skin - (correct Answer) - false
- From the top layer to the deepest layer: Epidermis, dermis and hypodermis.
the youngest keratinocytes are found in the stratum basale - (correct Answer) - true
- Produced deep in the epidermis by mitosis of stem cells in the stratum basale and as new ones form
they push old ones towards surface.
skin gets color from melanin, carotenes, and hemoglobin - (correct Answer) - true
-Melanin is the most significant factor in skin color. Hemoglobin is the red pigment of blood that gives
pinkish hues since vessels show through skin. Carotene gives colors based on diet.
the genetic lack of malanin is Albinism - (correct Answer) - true
- lack of melanin that results in milky white hair and skin and blue eyes.
the skin color of embarrassment is cyanosis - (correct Answer) - false
-Cyanosis is blueness of the skin resulting from deficiency of O2 in circulating blood.
elevated patches of skin are freckles - (correct Answer) - false
- elevated patches of skin is moles. Freckles are flat dots on the skin.
straight hair is round, wavy is oval, curly is flat - (correct Answer) - true
hair and nails are composed of collagen - (correct Answer) - false
- Hair and nails are composed of mainly dead keratinized cells.
merocrine sweat glands are associated with hair follicles in the pubic and axillary regions - (correct
Answer) - false
the first step in synthesis of vitamin D begins in the skin - (correct Answer) - true
- starts off with the synthesis of vitamin D which is needed for bone development and maintenance. The
liver and kidneys complete the process.
living keratinocytes exfoliate from the epidermis as dander - (correct Answer) - false
- they exfoliate(flake off) from the epidermal surface as specks called dander. Dander - floats around as
tiny white specks (dust)
the hypodermis is the deeper of the 2 layers of skin - (correct Answer) - false
- From the top layer to the deepest layer: Epidermis, dermis and hypodermis.
the youngest keratinocytes are found in the stratum basale - (correct Answer) - true
- Produced deep in the epidermis by mitosis of stem cells in the stratum basale and as new ones form
they push old ones towards surface.
skin gets color from melanin, carotenes, and hemoglobin - (correct Answer) - true
-Melanin is the most significant factor in skin color. Hemoglobin is the red pigment of blood that gives
pinkish hues since vessels show through skin. Carotene gives colors based on diet.
the genetic lack of malanin is Albinism - (correct Answer) - true
- lack of melanin that results in milky white hair and skin and blue eyes.
the skin color of embarrassment is cyanosis - (correct Answer) - false
-Cyanosis is blueness of the skin resulting from deficiency of O2 in circulating blood.
elevated patches of skin are freckles - (correct Answer) - false
- elevated patches of skin is moles. Freckles are flat dots on the skin.
straight hair is round, wavy is oval, curly is flat - (correct Answer) - true
hair and nails are composed of collagen - (correct Answer) - false
- Hair and nails are composed of mainly dead keratinized cells.
merocrine sweat glands are associated with hair follicles in the pubic and axillary regions - (correct
Answer) - false
