CLT Wound Healing & Tissue Repair

Question 1

What are the four primary phases of wound healing in the correct sequential order?

Accepted Answer

Hemostasis, inflammation, proliferation, remodeling

Answer

Inflammation, proliferation, remodeling, hemostasis

Answer

Proliferation, hemostasis, inflammation, remodeling

Answer

Remodeling, proliferation, hemostasis, inflammation

Question 2

Which photoacceptor in cells is primarily responsible for absorbing red and near-infrared light to promote wound healing?

Accepted Answer

Cytochrome c oxidase

Answer

Melanin

Answer

Hemoglobin

Answer

Rhodopsin

Question 3

During which phase of wound healing does collagen synthesis by fibroblasts primarily occur?

Accepted Answer

Proliferative phase

Answer

Hemostasis phase

Answer

Inflammatory phase

Answer

Maturation phase

Question 4

What wavelength range is most commonly used in photobiomodulation for promoting wound healing?

Accepted Answer

600–1100 nm (red to near-infrared)

Answer

200–280 nm (UVC)

Answer

315–400 nm (UVA)

Answer

1200–2000 nm (mid-infrared)

Question 5

Which growth factor, upregulated by light therapy, plays a key role in angiogenesis during wound healing?

Accepted Answer

Vascular endothelial growth factor (VEGF)

Answer

Tumor necrosis factor-alpha (TNF-α)

Answer

Interleukin-6 (IL-6)

Answer

C-reactive protein (CRP)

Question 6

Chronic wounds are often characterized by which of the following?

Accepted Answer

Prolonged inflammatory phase and impaired proliferation

Answer

Elevated fibroblast activity and excess collagen

Answer

Accelerated progression through healing phases

Answer

Rapid epithelialization with minimal scarring

Question 7

How does photobiomodulation reduce inflammation in early wound healing without completely suppressing the immune response?

Accepted Answer

By modulating reactive oxygen species and promoting anti-inflammatory mediators

Answer

By destroying inflammatory cytokines with UV radiation

Answer

By applying thermal energy to cauterize inflamed tissue

Answer

By blocking pain receptors in the wound bed