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SWM Module 1: Skin & Underlying Structues

front 1

What is the average pH of the acid mantle of an adult’s skin?

A. 5.5

B. 0 to 4.5

C. 7.1 to 14

D. 7.0

back 1

A- For adults, the average pH of skin hovers around 5.5.

front 2

Which type of cells are the FIRST line of defense against environmental antigens?

A. Desmosomes

B. Merkel Cells

C. Langerhans Cells

D. Macrophages

back 2

C- Langerhans cells are the first line of defense against environmental antigens.

front 3

What is the process that occurs to dissipate heat by bringing warm blood closer to the surface of the skin?

A. Vasodilation

B. Sweating

C. Vasoconstriction

D. Pilomotor Reflex

back 3

A- Vasodilation occurs when the blood vessels widen to allow more blood to flow to the skin's surface to dissipate heat.

front 4

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

A. Stratum Lucidum

B. Stratum Spinosum

C. Stratum Germinativum

D. Stratum Granulosum

back 4

C- The Stratum Germinativum is the deepest layer of the epidermis and is responsible for producing new cells through mitosis.

front 5

What is the extracellular matrix in the dermis made of?

A. Sugars, protein, collagen, and elastin

B. Blood vessels, lymphatics, and epithelial cells

C. Fibroblasts, macrophages, and mast cells

D. Connective tissue, adipose, and nerves

back 5

A. The extracellular matrix is made of sugars, protein, collagen, and elastin.

front 6

Which choice BEST describes the function of tendons?

A. Attaches bone to bone

B. Connects muscle to bone

C. Provides a surface for bones to glide over

D. Surround muscles to reduce friction

back 6

B- Tendons are fibrous connective tissues that have the specific function of connecting muscles to bones.

front 7

What BEST describes the characteristics of healthy skeletal muscle?

A. White and shiny in appearance

B. Pearly white ribbon-like appearance

C. Pink to dark red in color with striation

D. Pale pink without striation

back 7

C- Healthy skeletal muscle is characterized by a pink to dark red color and is firm with striation.

front 8

What is the primary composition of fascia?

A. Adipose tissue

B. Collagen

C. Keratin

D. Muscle tissue

back 8

B- Fascia is a sheath of connective tissue that is primarily composed of collagen.

front 9

Which component of blood is PRIMARILY involved in forming the INITIAL phase of a blood clot?

A. Red blood cells

B. White blood cells

C. Platelets

D. Eosinophils

back 9

C- Platelets are crucial in the initial phase of blood clotting, as they create a platelet plug at the site of injury.

front 10

What role does melanin play in protecting the skin from ultraviolet radiation?

A. Creates a physical barrier by scattering and absorbing UV rays

B. Increases transepidermal water loss to cool the skin

C. Creates a protective film called the acid mantle

D. Stimulates sweating to enhance evaporation and subsequent cooling

back 10

A- Melanin protects against ultraviolet radiation by scattering and absorbing UV rays, creating a barrier that decreases the amount of UV penetration.