Maryville Patho NURS 611 Exam 2. dr. wunderlich ; 2023-2024

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Which body system is responsible for conserving energy and body resources - ANSWER Parasympathetic nervous system which system responds to stress by preparing the body to defend itself - ANSWER Sym ... pathetic nervous system (SNS) how is blood flow redistributed by the sympathetic nervous system (SNS) - ANSWER blood flow to the muscles is increased while blood flow to GI and integumentary is decreased how are primary brain injuries classified - ANSWER focal or diffuse (aka multifocal) focal brain injuries - ANSWER specific, grossly observable brain lesions that occur in a precise location Epidural and subdural hemorrhages diffuse brain injuries - ANSWER include brain injury due to hypoxia, meningitis, encephalitis, and damage to blood vessels The brain is confined in a limited space so increased pressure can cause collateral dysfunction: Diabetes Insipidus (ADH not secreted thus polyuria) autonomic hyperreflexia - ANSWER affected at the t5-t6 level or above; characterized by paroxysmal HTN (up to 300 mmHg systolic), a pounding headache, blurred vision, sweating above the level of the lesion with flushing of the skin, nasal congestion, nausea, piloerection caused by pilomotor spasm, and bradycardia (30-40 beats/min) location of lesions in cases of autonomic hyperreflexia - ANSWER individual most likely to be affected have lesions at the T5-T6 level or above sequence of events that lead to hyperreflexia induced bradycardia - ANSWER bradycardia (30-40bpm) is a sx of hyperreflexia Stimulation of the carotid sinus -->vagus nerve -->sinoatrial (SA) node. The intact ANS reflexively responds with an arteriolar spasm that increases blood pressure. Baroreceptors in the cerebral vessels, the carotid sinus, and the aorta sense the HTN and stimulate the PNS. The heart rate decreases, but the visceral and peripheral vessels do not dilate because efferent impulses cannot pass through the cord [Show More]

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