Flight and fight response made by the body in emergency situation is associated with the increased activity o… - VSSC Nursing Officer - 2021

VSSC Nursing Officer - 2021

Applied Physiology

Easy

Appeared in: VSSC Nursing Officer - 2021

Explanation

The 'fight or flight' response is an immediate physiological reaction to a stressful or dangerous situation.
This response is mediated by the sympathetic nervous system, which directly stimulates the adrenal medulla.
The adrenal medulla releases catecholamine hormones, mainly epinephrine (adrenaline) and norepinephrine (noradrenaline).
These hormones rapidly increase heart rate, blood pressure, and blood glucose levels, preparing the body for intense physical action.

Option B: The pituitary gland is involved in the slower, long-term stress response (HPA axis) by releasing ACTH, which stimulates cortisol production. It is not the primary gland for the immediate 'fight or flight' reaction.
Option C: The thyroid gland's primary function is to regulate the body's basal metabolic rate, growth, and development. It is not directly involved in the acute stress response.
Option D: The pancreas regulates blood glucose levels via insulin and glucagon. While blood sugar rises during the fight-or-flight response, this is a secondary effect of epinephrine on the liver, not a primary action of the pancreas.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Physiology of the 'fight or flight' response and the role of the endocrine system as background academic context rather than a clinical decision trigger.
Understanding the fight-or-flight response is crucial for nurses, as it explains the physiological signs seen in patients experiencing acute stress, trauma, anxiety, or shock (e.g., tachycardia, hypertension, pallor).
Epinephrine is a life-saving drug used in emergencies like anaphylactic shock and cardiac arrest precisely because it mimics and amplifies this natural response, supporting circulation and opening airways.
What if the stress is not short-lived but chronic? The body would activate the HPA (Hypothalamic-Pituitary-Adrenal) axis, leading to prolonged high levels of cortisol. This would shift the answer towards the pituitary gland's role and can lead to negative health consequences like immunosuppression, weight gain, and increased risk of chronic diseases.

How to Approach the Question

First, identify the key phrase in the question: 'Flight and fight response'. This is a classic physiological concept.
Recall the primary hormones and gland associated with this immediate stress reaction. The hormones are adrenaline (epinephrine) and noradrenaline (norepinephrine).
Remember that these hormones are produced by the adrenal glands, specifically the adrenal medulla.
Scan the options to find the 'Adrenal gland'.
Briefly consider the other options to confirm they are incorrect. The pituitary is for long-term stress, the thyroid for metabolism, and the pancreas for blood sugar control. This confirms the adrenal gland is the correct choice.

Concept Tested & Keywords

Concept Tested: Physiology of the 'fight or flight' response and the role of the endocrine system.
Stem keywords: Flight and fight response, emergency situation, increased activity
Lead-in keywords: BEST, MOST RELEVANT CLUE
Clinical cues: The care setting changes urgency, monitoring level, and the expected nursing action.

Q_KvlaHEmmRDZTWZdxux2Q

E6 Nursing Brunner Adult Health 3SA Vol 1 Part 4 p. 32-34

E6 Psychology Morgan King 9e Part 1 p. 331-333