The nurse is talking with a couple at a community health fair who ask how cancerous tumors occur. Which pathophysiological process supports the nurse's reponse about cancer cells developement?
Cell division occurs with the replication of parent cell's DNA distributed to daughter cells with duplicated chromosomes.
Cells proliferate until a finite cell density is reached, which is determined by the availability of growth factors.
Abnormal cell growth that remains confined to its original location, without invading surrounding tissue or spreading.
Alteration of cellular genetics proliferates a mutated cell that progresses to surrounding and distant tissues.
The Correct Answer is D
A. Cell division occurs with the replication of parent cell's DNA distributed to daughter cells with duplicated chromosomes. This describes normal cell division (mitosis), not cancerous growth. In healthy cells, division is controlled, and errors are corrected by regulatory mechanisms.
B. Cells proliferate until a finite cell density is reached, which is determined by the availability of growth factors. Normal cells exhibit contact inhibition, meaning they stop dividing when they reach a certain density. Cancer cells ignore these regulatory signals and continue to grow uncontrollably.
C. Abnormal cell growth that remains confined to its original location, without invading surrounding tissue or spreading. This describes benign tumors, which do not spread. Cancerous (malignant) tumors, however, invade nearby tissues and can metastasize to distant organs.
D. Alteration of cellular genetics proliferates a mutated cell that progresses to surrounding and distant tissues. Cancer begins with genetic mutations that cause uncontrolled cell proliferation. As cancer progresses, cells invade surrounding tissues and may spread (metastasize) to distant sites via the blood and lymphatic systems. This is the defining characteristic of malignancy.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Auscultate for bowel sounds. While monitoring for postoperative ileus is important, it is not the priority intervention in a patient who is suddenly confused and lethargic after hip surgery. Avascular complications, fat embolism, or deep vein thrombosis (DVT) are more immediate concerns.
B. Compare pedal pulses bilaterally. A sudden change in mental status after hip arthroplasty could indicate a fat embolism or deep vein thrombosis (DVT) leading to pulmonary embolism. Comparing bilateral pedal pulses helps assess for signs of vascular impairment or embolic complications, which are serious postoperative risks. Fat embolism syndrome (FES) can cause confusion, lethargy, and respiratory distress, requiring immediate intervention.
C. Observe the surgical incision. While assessing for infection or bleeding is important, these complications do not typically cause sudden confusion and lethargy. Systemic embolic events or impaired circulation are more critical to assess first.
D. Assess mobility of the right leg. Evaluating mobility is part of routine post-arthroplasty care, but it does not directly address the sudden mental status changes seen in this patient. Assessing circulation and embolic risk takes priority.
Correct Answer is C
Explanation
A. Anaphylactic. Anaphylactic reactions are caused by severe allergic responses, leading to histamine release, vasodilation, and bronchoconstriction. While burns trigger an immune response, it is an inflammatory reaction rather than an allergic one.
B. Noncompensatory. The body's response to burns is compensatory, not noncompensatory. The body immediately reacts by activating the inflammatory and stress responses to maintain perfusion and initiate healing.
C. Inflammatory. A severe burn triggers an immediate and massive inflammatory response, causing capillary leakage, fluid shifts (burn shock), and immune activation. This leads to edema, hypovolemia, and increased risk of infection. The inflammatory response also activates cytokines and white blood cells to begin tissue repair.
D. Cholinergic. The cholinergic response is related to the parasympathetic nervous system, which controls rest-and-digest functions. Severe burns primarily activate the sympathetic nervous system (fight-or-flight), leading to vasoconstriction, tachycardia, and increased metabolic demands.
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