I have just run all the way from the parking deck to the lab to make class on time. Which thermoregulatory function of the skin would cause my flushed face?
sweat glands releasing fluid
constriction of the blood vessels in the dermis of my skin
dilation of the blood vessels in the dermis of my skin
sebaceous glands releasing their product
dilation of the blood vessels in the epidermis of my skin
The Correct Answer is C
A. sweat glands releasing fluid
Sweat helps with cooling through evaporation, not facial flushing.
B. constriction of the blood vessels in the dermis of my skin
Vasoconstriction reduces blood flow to the skin and is a response to cold, not exercise.
C. dilation of the blood vessels in the dermis of my skin
Vasodilation increases blood flow to the skin surface, releasing excess heat and resulting in a flushed appearance after physical exertion.
D. sebaceous glands releasing their product
Sebaceous glands produce oil (sebum) for waterproofing the skin and are unrelated to thermoregulation.
E. dilation of the blood vessels in the epidermis of my skin
The epidermis is avascular (has no blood vessels). Dilation occurs in the dermis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. collagen
Collagen provides tensile strength and structural support in connective tissues but is not water-resistant or as hard as keratin.
B. elastic
Elastic fibers allow tissues to stretch and recoil. They are not hard or water-resistant.
C. hyaluronic acid fibrin
Hyaluronic acid is a glycosaminoglycan important for hydration in connective tissue; fibrin is a clotting protein. Neither is a hard, water-resistant structural protein.
D. keratin
Keratin is a fibrous protein found in skin, hair, and nails. It provides a tough, water-resistant barrier on the outer skin (especially in the stratum corneum).
Correct Answer is B
Explanation
A. the sweat glands released their product, causing the hair to grow
Hair does not grow postmortem, and sweat gland activity ceases after death.
B. the skin retracted from the hair follicles
After death, the skin dehydrates and shrinks, which can cause the hair shaft to appear longer, giving the illusion that hair has grown, even though it hasn't.
C. during the process of decomposition, the hairs grew out of the follicles
Hair cannot grow after death because cellular metabolism and mitosis cease.
D. the skin grew out, forcing the hair out of the follicles
Skin does not grow postmortem; this is scientifically inaccurate.
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