General Adaptation Syndrome (GAS) is seen in-
**Core Concept**
The General Adaptation Syndrome (GAS) refers to a three-stage physiological response to stress, characterized by a predictable sequence of alarm, resistance, and exhaustion. This concept was first introduced by Hans Selye in 1936, highlighting the body's adaptive mechanisms in response to stress.
**Why the Correct Answer is Right**
During the alarm stage, the body's "fight or flight" response is triggered, releasing stress hormones like cortisol and adrenaline. This prepares the body for immediate action, but if the stress persists, the body enters the resistance stage, where it attempts to adapt to the stress through various physiological changes, such as changes in blood pressure, heart rate, and metabolism. If the stress continues, the body eventually reaches exhaustion, leading to impaired physiological function and potential disease.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because GAS is not primarily a psychological response, although it may have psychological components. GAS is a physiological response to stress, characterized by specific hormonal and bodily changes.
**Option B:** This option is incorrect because GAS is not a disease or disorder, but rather a normal physiological response to stress. While stress can contribute to various diseases, GAS itself is not a disease.
**Option C:** This option is incorrect because GAS is not a response to a specific type of stress, such as physical or emotional stress. GAS is a general response to any type of stress that exceeds the body's ability to adapt.
**Clinical Pearl / High-Yield Fact**
The General Adaptation Syndrome is a key concept in understanding the physiological response to stress, and it has implications for various medical conditions, such as hypertension, atherosclerosis, and immunosuppression.
**Correct Answer: A. Stress.**