Podcast
Questions and Answers
What are the functions of hair? (Select all that apply)
What are the functions of hair? (Select all that apply)
What does the hair help protect? (Select all that apply)
What does the hair help protect? (Select all that apply)
What is chemical signal dispersal?
What is chemical signal dispersal?
Hairs help disperse pheromones that are detected by the vomeronasal organ in the nose.
Hair color is determined by what?
Hair color is determined by what?
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The more melanin in hair, what happens to its color?
The more melanin in hair, what happens to its color?
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What pigment is responsible for red hair?
What pigment is responsible for red hair?
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What causes gray hair?
What causes gray hair?
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What occurs with white hair?
What occurs with white hair?
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Hair loss can be caused by which of the following? (Select all that apply)
Hair loss can be caused by which of the following? (Select all that apply)
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Study Notes
Functions of Hair
- Hair serves multiple purposes, including protection, heat retention, facial expression, sensory reception, visual identification, and dispersing chemical signals.
Protection
- Hair cushions the head and safeguards the scalp from environmental elements.
- Nose and ear hairs block insects and other foreign particles from entering the body.
- Eyebrows and eyelashes shield the eyes from debris and sweat.
Chemical Signal Dispersal
- Hair aids in the distribution of pheromones, which are detected by the vomeronasal organ in the nose, playing a role in social and reproductive behaviors.
Hair Color Determination
- Hair color is influenced by the type and quantity of melanin produced in the stratum basale cells located at the hair follicle's base.
Melanin Production and Hair Color
- Increased melanin results in darker hair, with the spectrum ranging from blond to black.
- A unique iron-based pigment is responsible for the coloration of red hair.
Aging and Hair Color Changes
- Gray hair emerges from a progressive decrease in melanin production in hair follicles.
- Complete absence of pigment leads to the formation of white hair.
Causes of Hair Loss
- Hair loss can stem from various factors, including dietary deficiencies, high fever, exposure to radiation, certain medications, aging, genetic predisposition, and hormonal fluctuations.
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Description
Explore the various functions of hair through these flashcards. Learn about its roles in protection, sensory reception, and visual identification. Test your knowledge on how hair contributes to facial expression and chemical signaling.
