- Baboons are stressed by social factors like status, relationships, and unpredictability, unlike typical animals whose stress is usually triggered by immediate physical threats like predators.
- Sapolsky measures levels of stress hormones (like cortisol) in the blood of baboons to assess their stress levels.
- It means humans cannot easily turn off their stress response once it’s activated; they often ruminate or anticipate future stressors, keeping the body in a prolonged state of alert.
- In baboons, lower-ranking individuals have higher levels of stress hormones, heart rate, and blood pressure due to chronic social stress, while higher-ranking ones show lower levels.
- Sapolsky explains that chronic stress leads to physical consequences like cardiovascular disease, weakened immune function, and neurological damage such as hippocampal atrophy affecting memory.
- Workers in the British Civil Service are good to study because they have similar access to healthcare and income but vary widely in job control and hierarchy, allowing researchers to isolate the effects of social status on health.
- The Civil Service study discovered that lower-ranking employees had significantly higher rates of heart disease and mortality, showing a clear gradient: the lower the rank, the worse the health outcomes.
- Historically, stomach ulcers were the first physical problem tied to stress. The recent discovery that Helicobacter pylori causes ulcers supports this connection because stress weakens the stomach lining, making it more vulnerable to bacterial infection.
- Carol Shively discovered that macaque monkeys with low social status showed increased atherosclerosis (arterial plaque buildup), linking chronic social stress directly to cardiovascular disease.
Parent Tip: Review the logic above to help your child master the concept of stress portrait of a killer worksheet answers.
