TX Barber Scientific Concepts Flashcards

Which type of bacteria is responsible for causing tuberculosis and is a key concern in barber sanitation protocols?

Answer: Mycobacterium tuberculosis

Mycobacterium tuberculosis is a rod-shaped (bacilli) bacterium that causes tuberculosis and is a primary concern in barbershop infection control.

The process by which chemical disinfectants destroy the cell membrane of bacteria is called:

Answer: Lysis

Lysis is the destruction or dissolution of a cell's membrane, which is how many disinfectants kill bacterial organisms.

What is the pH range of healthy human skin?

Answer: 4.5–5.5

Healthy human skin has a slightly acidic pH of 4.5–5.5, known as the acid mantle, which protects against microbial growth.

Which layer of the epidermis is responsible for producing new skin cells through mitosis?

Answer: Stratum germinativum

The stratum germinativum (basal layer) is the deepest epidermal layer where cells divide by mitosis to produce new skin cells.

Quaternary ammonium compounds (quats) used as disinfectants in barbershops work primarily by:

Answer: Disrupting bacterial cell membranes through surfactant action

Quats are cationic surfactants that disrupt and penetrate bacterial cell membranes, causing leakage of cell contents and death.

The chemical symbol for sodium hypochlorite, the active ingredient in bleach used for barbershop disinfection, is:

Answer: NaClO

Sodium hypochlorite (NaClO) is the active disinfecting agent in bleach and works by releasing chlorine that oxidizes and destroys pathogens.

Which type of pathogen is NOT destroyed by chemical disinfectants and requires sterilization methods such as autoclaving?

Answer: Bacterial endospores

Bacterial endospores (like those from Clostridium and Bacillus species) form protective shells that resist chemical disinfectants and require steam sterilization (autoclaving) to destroy.