Psychological changes during emotional arousal results from activation of the sympathetic division of the?

RUHS, Jaipur, M.Sc Nursing Entrance Exam-2015

Applied Physiology

Easy

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2015

Explanation

The sympathetic division is one of the two main branches of the Autonomic Nervous System (ANS).
The ANS is responsible for regulating the body's involuntary functions, which are heavily involved in emotional responses.
During emotional arousal, the sympathetic division activates the 'fight or flight' response, causing physiological changes like increased heart rate, dilated pupils, and slowed digestion.
Therefore, the sympathetic division is a functional part of the Autonomic Nervous System.

Option B: The parasympathetic system is the other division of the ANS. It has the opposite effect of the sympathetic system, promoting 'rest and digest' functions. It is not the parent system of the sympathetic division.
Option C: The Central Nervous System (CNS) consists of the brain and spinal cord. While the CNS (specifically the hypothalamus and limbic system) controls the ANS, the sympathetic division itself is structurally part of the peripheral nervous system.
Option D: While the Autonomic Nervous System is a part of the broader Peripheral Nervous System (PNS), 'Autonomic Nervous System' is the more specific and direct classification. In anatomical hierarchy questions, the most precise answer is the best choice. The sympathetic system is a direct subdivision of the ANS.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Organization and function of the Autonomic Nervous System (ANS) as background academic context rather than a clinical decision trigger.
Understanding the ANS is fundamental for nurses to interpret a patient's vital signs accurately. For example, tachycardia (fast heart rate) and hypertension can be signs of pain, anxiety, or fear, all of which activate the sympathetic system.
Many common medications, such as beta-blockers (e.g., metoprolol) and anticholinergics (e.g., atropine), work by targeting the sympathetic or parasympathetic nervous systems. Knowledge of the ANS is essential for safe medication administration and monitoring for effects and side effects.
What if? If a patient is taking a beta-blocker, their heart rate might not increase significantly even if they are in severe pain or distress. A nurse must assess for other signs of sympathetic activation, such as sweating (diaphoresis), rapid breathing, and patient self-report, to avoid underestimating their condition.

How to Approach the Question

First, identify the core concept in the question: the classification of the 'sympathetic division'.
Recall the basic organizational structure of the human nervous system.
Mentally map the hierarchy: The entire system divides into the Central Nervous System (CNS) and Peripheral Nervous System (PNS).
The PNS further divides into the Somatic (voluntary) and Autonomic (involuntary) systems.
The Autonomic Nervous System (ANS) is then divided into the Sympathetic ('fight or flight') and Parasympathetic ('rest and digest') divisions.
Based on this hierarchy, the sympathetic division is a direct part of the Autonomic Nervous System.

Concept Tested & Keywords

Concept Tested: Organization and function of the Autonomic Nervous System (ANS).
Stem keywords: emotional arousal, sympathetic division, activation
Lead-in keywords: BEST, MOST RELEVANT CLUE
Negative lead-in flag: false