EC EC Hair Growth and Follicle Anatomy 2 — Questions and Answers
Question 1: What type of hair is fine, soft, unpigmented, and covers most of the body?
- Terminal hair
- Vellus hair (Correct answer)
- Lanugo hair
- Club hair
Correct answer: Vellus hair
Vellus hair is the fine, short, lightly pigmented hair that covers most of the body surface.
Question 2: The arrector pili muscle is responsible for which phenomenon?
- Hair pigmentation
- Hair growth rate
- 'Goosebumps' when hair stands erect (Correct answer)
- Sebum secretion
Correct answer: 'Goosebumps' when hair stands erect
The arrector pili muscle contracts in response to cold or fear, causing the hair to stand upright and producing goosebumps.
Question 3: What gives hair its color?
- Keratin density
- Melanin produced by melanocytes in the hair bulb (Correct answer)
- Blood supply from the dermal papilla
- The ratio of vellus to terminal hairs
Correct answer: Melanin produced by melanocytes in the hair bulb
Melanocytes located in the hair bulb matrix produce melanin pigment, which determines hair color.
Question 4: Which type of hair growth pattern describes hair growing from a single follicle opening?
- Compound follicle
- Distorted follicle
- Solitary follicle (Correct answer)
- Compound unit
Correct answer: Solitary follicle
A solitary follicle produces one hair per opening, which is the most common pattern on most body areas.
Question 5: Hypertrichosis refers to which hair condition that an electrologist may be asked to treat?
- Absence of hair in normal areas
- Excessive hair growth beyond what is normal for age, sex, or ethnicity (Correct answer)
- Patchy hair loss
- Ingrown hairs
Correct answer: Excessive hair growth beyond what is normal for age, sex, or ethnicity
Hypertrichosis is a condition characterized by abnormal, excessive hair growth anywhere on the body.
Question 6: Which term describes the visible portion of the hair that extends above the skin surface?
- Hair root
- Hair shaft (Correct answer)
- Hair bulb
- Follicular canal
Correct answer: Hair shaft
The hair shaft is the visible portion of the hair that extends above the skin surface.
EC EC Hair Growth and Follicle Anatomy 2
What type of hair is fine, soft, unpigmented, and covers most of the body?