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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. In the context of electricity used in barbering, what does the term 'ampere' measure?

    Answer: The rate of flow of electrical current

    Ampere (amp) measures the rate of flow of electrical current — specifically, the number of electrons moving past a point per second.

  2. Infrared light used in heat lamps during barbering treatments penetrates tissue primarily to produce:

    Answer: Deep heat that increases blood circulation

    Infrared rays penetrate deeply into skin tissue, producing heat that dilates blood vessels and increases circulation, aiding in relaxation and product absorption.

  3. The high-frequency current used in barbering produces which of the following therapeutic effects?

    Answer: Germicidal and stimulating effects on the scalp

    High-frequency current generates heat within tissues and produces ozone at the skin surface, which has germicidal properties and stimulates the scalp.

  4. Which principle explains why two like electrical poles repel each other and why galvanic current can drive solutions into the skin?

    Answer: Iontophoresis via electrophoresis principles

    Iontophoresis uses the principle that like charges repel — a negative electrode drives negative ions (anions) into the skin while a positive electrode drives positive ions (cations).

  5. The chemical compound melanin, which gives hair its color, is produced by cells called:

    Answer: Melanocytes

    Melanocytes are specialized cells in the hair bulb and epidermis that produce melanin pigment, which is then transferred to cortical cells of the hair shaft.

  6. When an alkaline chemical relaxer is applied to hair, it breaks which chemical bonds in the cortex to straighten the hair?

    Answer: Disulfide bonds

    Alkaline relaxers (lye and no-lye) permanently straighten hair by breaking disulfide bonds in the cortex; these bonds do not reform in the straightened position.

  7. The cortex of the hair shaft is primarily composed of which protein?

    Answer: Keratin

    The hair cortex is made primarily of alpha-keratin, a fibrous structural protein containing high levels of the amino acid cysteine which forms disulfide bonds.