A researcher divides a group of animals into four groups in order to investigate the effects of stressors on tumor growth. Based on the results of past research, which group is likely to experience the most rapid tumor growth?

Question

Quizplus · Accepted Answer

Past research has shown that animals exposed to uncontrollable stressors are more likely to experience rapid tumor growth. This is likely due to the activation of the hypothalamic-pituitary-adrenal axis (HPA axis) and the release of stress hormones such as cortisol, which can suppress the immune system and promote tumor growth. Animals exposed to acute or controllable stressors may also experience some effects on tumor growth, but not to the same extent as those exposed to uncontrollable stressors. The effects of stressors early in life on tumor growth may depend on the specific timing and nature of the stressors.

A Researcher Divides a Group of Animals into Four Groups