Stress Response and Adaptation — MCQs

Cortisol increases all of the following components except:

Which neurotransmitter deficit is MOST consistently implicated as the primary mechanism in the pathophysiology of depression?

In surgical stress all hormones are increased except:

Which hormone is NOT increased in stress?

A patient with a pheochromocytoma is secreting large amounts of norepinephrine into the bloodstream. In a normal individual, this compound is usually released from the adrenal medulla in response to which of the following?

The following marked recordings in GIT are produced by:

The image shows migrating motor complexes in various parts of gut. Identify the correct statement.

A patient with chronic heart failure shows elevated ADH levels despite low serum osmolality (270 mOsm/kg) and hyponatremia (125 mEq/L). Critically evaluating this paradox, which represents the most physiologically sound explanation?

A 30-year-old woman participates in a hot yoga session (40°C ambient temperature) for 90 minutes. She maintains normal core temperature throughout. Analyzing her integrated physiological response, which combination of mechanisms is most critical for her thermoregulation?

A researcher studying metabolic responses observes that during prolonged fasting, brain metabolism shifts partially from glucose to ketone bodies, while RBCs continue using only glucose. What is the fundamental physiological principle explaining this difference?