What is the purpose of clotting?
To protect the body from injury
To prevent febrile seizures
To remove damaged cells
To dissolve scar tissue formation
The Correct Answer is A
A. To protect the body from injury: Clotting, or hemostasis, is the process by which the body stops bleeding after vascular injury. It involves platelet aggregation, activation of clotting factors, and formation of a fibrin mesh that seals the damaged vessel. This mechanism prevents excessive blood loss, preserves circulatory integrity, and allows tissue repair to occur.
B. To prevent febrile seizures: Febrile seizures are caused by rapid increases in body temperature in young children and are unrelated to the clotting process. Clotting does not influence neurological activity or seizure prevention.
C. To remove damaged cells: The removal of damaged or apoptotic cells is primarily managed by the immune system and phagocytic activity, not by clotting. Hemostasis focuses on sealing injured blood vessels rather than clearing cellular debris.
D. To dissolve scar tissue formation: Clotting contributes to the initial formation of a fibrin matrix that aids healing, but dissolving scar tissue involves tissue remodeling mediated by fibroblasts and enzymes like collagenases. Clotting itself does not dissolve existing scar tissue.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Decreased urine output:When the body experiences fluid deficit, compensatory mechanisms such as activation of the renin-angiotensin-aldosterone system and antidiuretic hormone release reduce renal excretion to conserve water. This leads to oliguria, which is an early and common manifestation of dehydration as the kidneys attempt to maintain circulating volume.
B. Bradycardia:Fluid deficit typically triggers sympathetic nervous system activation, which increases heart rate (tachycardia) to maintain perfusion. Bradycardia is not expected; it may indicate another pathology rather than compensation for fluid loss.
C. Poor skin turgor:Poor skin turgor is a late sign of fluid loss and reflects chronic or severe dehydration rather than the immediate compensatory response. Early compensation primarily affects cardiovascular and renal function.
D. High blood pressure:Fluid deficit usually results in hypotension due to decreased circulating volume. Blood pressure often falls as dehydration progresses, prompting compensatory mechanisms like vasoconstriction, but hypertension is not a typical compensatory manifestation.
Correct Answer is A
Explanation
A. Anaphylactic reaction:Anaphylaxis triggers the release of histamine and other inflammatory mediators, which increase capillary permeability. This allows fluid and plasma proteins to move from the intravascular space into the interstitial tissues, resulting in generalized edema, swelling, and potentially life-threatening hypotension.
B. Lymph node obstruction:Lymphatic obstruction leads to lymphedema due to impaired drainage of interstitial fluid. While it causes localized swelling, it is not primarily due to increased capillary permeability but rather mechanical blockage of lymph flow.
C. Heart failure:Edema in heart failure results from elevated hydrostatic pressure in the venous system, causing fluid to leak into the interstitial space. The mechanism is pressure-driven rather than an increase in capillary permeability.
D. Hyponatremia:Hyponatremia causes water to shift into cells due to osmotic imbalance, potentially leading to cellular swelling. It does not directly increase capillary permeability or cause extracellular edema in the same mechanism seen in inflammatory reactions.
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