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TX Barber Scientific Concepts Flashcards

7 cards from real TX BAR practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 TX Barber Scientific Concepts flashcards as text

  1. Tinea capitis is a scalp condition caused by which type of pathogen?

    Answer: Fungus

    Tinea capitis is a fungal infection of the scalp and hair follicles, caused by dermatophyte fungi — it is highly contagious and a contraindication for barbering services.

  2. Seborrhea is a scalp condition caused by:

    Answer: Overactive sebaceous glands producing excess oil

    Seborrhea results from overactive sebaceous glands that produce excessive sebum (oil), leading to an oily scalp and skin condition.

  3. Monilethrix is a hair disorder characterized by:

    Answer: Beaded appearance of the hair shaft with alternating thick and thin sections

    Monilethrix is a rare genetic hair disorder causing the hair shaft to have alternating node-like thickenings and constrictions, giving a beaded appearance that makes hair fragile.

  4. During a permanent wave, the 'processing' stage involves the waving lotion (usually ammonium thioglycolate) breaking which bonds in the hair?

    Answer: Disulfide bonds in the cortex

    The reducing agent in waving lotion (ammonium thioglycolate) breaks disulfide bonds in the cortex, allowing the hair to take the shape of the rod.

  5. Which acid-based chemical process is used to straighten hair by temporarily breaking hydrogen bonds without permanently altering disulfide bonds?

    Answer: Keratin smoothing treatment

    Keratin smoothing treatments (Brazilian blowouts) use formaldehyde or formaldehyde-releasing compounds to temporarily relax hydrogen bonds and coat the cuticle, providing temporary straightening.

  6. The hydrogen peroxide (H2O2) developer used with oxidative hair color releases oxygen, which performs which function?

    Answer: Oxidizes colorless dye molecules to develop color and lightens melanin

    The nascent oxygen released by hydrogen peroxide both oxidizes (polymerizes) the small dye intermediates into larger color molecules and partially oxidizes natural melanin, contributing to lightening.

  7. Alopecia areata is believed to be caused by:

    Answer: Autoimmune attack on hair follicles

    Alopecia areata is an autoimmune condition in which the immune system mistakenly attacks hair follicles, causing patchy, non-scarring hair loss.