Dermatologist Certificate Dermatological Procedures and Treatments 2

Question 1

What is the primary mechanism of action of botulinum toxin A in cosmetic dermatology?

Accepted Answer

Inhibits acetylcholine release at the neuromuscular junction causing temporary muscle paralysis

Answer

Botulinum toxin A cleaves SNAP-25, preventing acetylcholine vesicle fusion at the neuromuscular junction, thereby causing temporary flaccid paralysis of injected muscles.

Question 2

Which filler material provides the longest duration of effect among commonly used dermal fillers?

Accepted Answer

Poly-L-lactic acid (Sculptra)

Answer

Poly-L-lactic acid (Sculptra) is a biostimulatory filler that stimulates neocollagenesis over months, with results lasting up to 2 years or more.

Question 3

What is the purpose of patch testing in dermatology?

Accepted Answer

To identify specific allergens causing allergic contact dermatitis

Answer

Patch testing (epicutaneous testing) identifies specific causative allergens in type IV delayed hypersensitivity reactions responsible for allergic contact dermatitis.

Question 4

Which electrosurgical technique uses alternating current to destroy tissue while controlling hemostasis?

Accepted Answer

Electrodesiccation and curettage (ED&C)

Answer

Electrodesiccation and curettage uses high-frequency alternating current to dehydrate and destroy superficial tumor tissue, followed by physical removal with a curette.

Question 5

What is the correct depth of injection for hyaluronic acid filler used to treat nasolabial folds?

Accepted Answer

Deep dermis to subcutaneous junction

Answer

Nasolabial fold correction with HA filler requires injection at the deep dermis to subcutaneous junction to provide volume support and lift without visibility of filler.

Dermatologist Certificate Practice Test

Dermatologist Certificate Practice Test

Dermatologist Certificate Dermatological Procedures and Treatments 2