AP PSYCHOLOGY

Detailed explanation-1: -The major feature of sickness behavior is a general decrease in activity (immobility, sleepiness, reduced food and water intake). Sickness behavior may be interrupted in response to important strong stimuli (e.g., a sick sow may respond to a newborn piglet).

Detailed explanation-2: -Group members presumably recognize the signs of sickness associated with acute infectious diseases and avoid close contact with the sick one while the sick one goes through the stages of sickness and recovers or dies. Distancing from contaminated areas is a similar strategy for avoiding infection.

Detailed explanation-3: -Sickness behavior is a coordinated set of adaptive behavioral changes that occur in physically ill animals and humans during the course of infection. These behaviors include lethargy, depressed mood, reduced social exploration, loss of appetite, sleepiness, hyperalgesia, and, at times, confusion.

Detailed explanation-4: -Sickness behavior is a behavioral complex induced by infections and immune trauma and mediated by pro-inflammatory cytokines. It is an adaptive response that enhances recovery by conserving energy to combat acute inflammation.