In the context of wound healing, which phase involves the formation of new tissue and blood vessels?
Hemostasis phase
Proliferative phase
Maturation phase
Inflammatory phase
The Correct Answer is B
A. Hemostasis phase: This is the immediate response to injury (seconds to minutes) where blood vessels constrict and platelets clump together to form a clot and stop bleeding.
B. Proliferative phase: Occurring roughly from day 3 to 21, this phase focuses on rebuilding. Fibroblasts synthesize collagen to form new tissue (granulation tissue), and angiogenesis occurs, which is the creation of new blood vessels to supply oxygen and nutrients to the healing wound.
C. Maturation phase: Also known as the remodeling phase, this is the final stage (lasting months to years) where the new collagen is reorganized and strengthened. No new blood vessels are typically formed; in fact, many unnecessary vessels regress.
D. Inflammatory phase: This phase follows hemostasis (days 0-4) and is characterized by the body cleaning the wound. White blood cells (neutrophils and macrophages) destroy bacteria and remove debris, causing swelling and redness, but they do not yet build new tissue.
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Related Questions
Correct Answer is A
Explanation
A. To line and support the abdominal cavity and its organs:The peritoneum is a serous membrane that forms the lining of the abdominal cavity (parietal peritoneum) and covers most of the intra-abdominal organs (visceral peritoneum). It supports the organs, holds them in place, and secretes serous fluid to reduce friction during movement (like digestion).
B. To secrete hormones that regulate metabolism:This is the primary function of the endocrine system (e.g., thyroid gland, pancreas, adrenal glands), not the peritoneal membrane.
C. To facilitate gas exchange in the lungs:Gas exchange occurs in the alveoli of the lungs. The membrane lining the thoracic cavity and lungs is the pleura, not the peritoneum.
D. To protect the brain and spinal cord:The protective membranes covering the central nervous system (brain and spinal cord) are collectively called the meninges(dura mater, arachnoid mater, and pia mater).
Correct Answer is B
Explanation
A. Distal:Distal means farther from the point of attachment or farther from the trunk/center of the body (used for limbs). It does not indicate “closer to the head.”
B. Superior: Superior (also called cranial) means toward the head or upper part of a structure - i.e., closer to the head.
C. Inferior:Inferior means below or toward the feet - farther from the head. It is the opposite of superior.
D. Proximal:Proximal means nearer to the point of attachment to the trunk or nearer to the origin of a structure (used for limbs). It does not mean closer to the head unless the trunk/attachment happens to be superior, so this term is not the correct general term for “closer to the head.”
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