#1
Which phase of wound healing involves the formation of a blood clot?
Hemostasis phase
ExplanationInitial phase where bleeding stops and a blood clot forms.
#2
Which type of tissue predominates in a scar formed during wound healing?
Connective tissue
ExplanationScar tissue mainly composed of collagen and other connective tissue components.
#3
During which phase of wound healing do wound edges come together and reepithelialize?
Proliferative phase
ExplanationRecovery phase where new tissue forms and wound edges close.
#4
Which phase of wound healing involves the removal of necrotic tissue and debris?
Inflammatory phase
ExplanationInitial phase where the body clears debris and initiates the healing process.
#5
Which cell type is responsible for depositing extracellular matrix proteins during wound healing?
Fibroblasts
ExplanationCells that produce structural proteins for tissue repair.
#6
Which cell type is responsible for phagocytosing debris and bacteria during the inflammatory phase of wound healing?
Neutrophils
ExplanationWhite blood cells that engulf and digest pathogens and debris.
#7
Which of the following cells are responsible for producing collagen during wound healing?
Fibroblasts
ExplanationCells responsible for synthesizing collagen and extracellular matrix proteins.
#8
During which phase of wound healing do epithelial cells migrate over the wound?
Proliferative phase
ExplanationPhase marked by cell proliferation and migration, including epithelial cell migration.
#9
Which enzyme is responsible for breaking down fibrin during the remodeling phase of wound healing?
Plasmin
ExplanationEnzyme that dissolves fibrin blood clots.
#10
Which vitamin is essential for collagen synthesis and wound healing?
Vitamin C
ExplanationCritical for collagen synthesis and acts as an antioxidant.
#11
Which type of collagen is primarily synthesized during the proliferative phase of wound healing?
Type III collagen
ExplanationType of collagen synthesized early in wound healing, providing temporary structural support.
#12
Which cells are responsible for the initiation of the inflammatory phase during wound healing?
Platelets
ExplanationBlood cells that release factors triggering inflammation and clotting.
#13
Which molecule is a key mediator of the inflammatory phase in wound healing?
Tumor necrosis factor-alpha
ExplanationProinflammatory cytokine that orchestrates immune responses.
#14
Which growth factor is involved in promoting angiogenesis during wound healing?
Vascular endothelial growth factor (VEGF)
ExplanationStimulates the growth of new blood vessels from pre-existing ones.
#15
What is the primary function of myofibroblasts during wound healing?
Contraction of the wound
ExplanationContractile cells that reduce the wound size.
#16
Which of the following factors can impair wound healing?
Infection
ExplanationPresence of harmful microorganisms at the wound site.
#17
What is the term for the process by which a wound heals without scar formation?
Regeneration
ExplanationComplete restoration of tissue without fibrosis or scarring.
#18
Which of the following is NOT a characteristic of chronic wounds?
Abundant growth factors
ExplanationChronic wounds lack the necessary factors for timely healing.
#19
Which of the following factors promotes fibroblast migration during wound healing?
Platelet-derived growth factor (PDGF)
ExplanationStimulates fibroblast migration and proliferation.
#20
Which phase of wound healing is characterized by wound contraction and scar remodeling?
Remodeling phase
ExplanationPhase where scar tissue matures and remodels for improved strength.