Questions and Answers
Which of the following is NOT one of the main purposes of hair?
The technical term for the study of hair is called:
When looking through a microscope, which portion of the hair would display living cells?
Hair grows from a tube-like 'pocket' called a root sheath or a(n):
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The diameter of a hair fiber will be the same as:
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What is the natural flow of hair determined by?
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The two primary parts of hair are the hair fiber and the:
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What is the portion of hair that extends above the skin's surface?
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Which of the following resembles the shape of a golf club and covers the follicle at the lower portion of the hair root?
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Located at the bottom of the follicle and supplying nourishment to the germinal matrix is the:
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The three major layers of the hair are the medulla, cortex, and which of the following?
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The pigment that gives hair its color is found primarily in the:
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The layer of hair consisting of unique protein structures that gives hair most of its pigment and strength (elasticity) is called the:
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The outer covering of the hair shaft made up of overlapping layers of transparent scales is called the:
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Hair that has been pulled out from the root can grow back under which of the following circumstances?
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The central core of the hair shaft sometimes missing in fine or very fine hair is called the:
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Which of the following items helps protect the hair and skin from becoming too dry?
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Oil glands are attached to the side of the:
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What is formed when sebum produced by the oil glands mixes with the body's perspiration?
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The muscle that causes the hair to stand on end when a person is scared or cold is known as the:
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Hair is made up primarily of:
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Which of the following is known as the active growing stage of hair?
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The active growing stage of hair lasts from:
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Catagen, a brief transitional stage of hair growth, lasts for what amount of time?
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The hair growth stage when all cell division stops is the:
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Study Notes
Hair Purposes and Terminology
- Main purposes of hair include support, adornment, protection from cold and injury; support is not a main purpose.
- Trichology is the technical term for the study of hair.
Hair Structure and Growth
- Hair bulb is the portion of hair that contains living cells observed under a microscope.
- Hair grows from a follicle, a tube-like structure also referred to as the root sheath.
- The inside diameter of the hair follicle determines the diameter of a hair fiber.
- The angle of the follicle dictates the natural flow of hair.
Hair Components
- Two primary components of hair: hair fiber and hair root.
- The portion of hair that extends above the skin's surface is the hair fiber.
- The bulb resembles a golf club and covers the follicle at the hair root's lower portion.
- Papilla at the bottom of the follicle nourishes the germinal matrix.
Hair Layers
- Hair consists of three major layers: medulla, cortex, and cuticle.
- The cortex contains the pigment that gives hair its color and provides strength and elasticity.
- The cuticle is the outer layer made of overlapping transparent scales.
Hair Growth and Regeneration
- If the papilla remains intact, hair can regrow after being pulled out from the root.
- The medulla is the central core of the hair shaft, often absent in fine hair.
Hair Care and Protection
- Sebum produced by oil glands protects hair and skin from dryness.
- Oil glands are found along the root sheath or follicle.
- The combination of sebum and perspiration forms the acid mantle.
Hair and Muscle Interaction
- The arrector pili muscle causes hair to stand up in response to cold or fear.
Hair Composition and Growth Cycle
- Hair is primarily made of protein.
- The anagen stage is the active growing phase of hair.
- Active growth in the anagen stage can last between 2 to 6 years.
- Catagen is a transitional stage lasting only a few weeks, during which cell division stops.
- The telogen stage follows, marking the phase when all cell division ceases.
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Description
Test your knowledge on hair science with this quiz based on Pivot Point Chapter 7. Explore essential concepts including the study of hair, its functions, and related terminology. Perfect for students in cosmotology and those interested in trichology.
