University:
Boston University
Course:
CAS CS 200 | Computer Science Workshops
Academic year:

2024
Views:

83

Pages:

2
Author:

Skye S.

Stress disrupts homeostasis, which is the maintenance of a stable environment in the body. It can be either positive (eustress) or negative (distress), and can be triggered by psychological, physical, or physiological stimuli. Chronic stress has been linked to various health issues such as diminished immunity, cancer, heart disease, and depression. Bullet points Stress Response & Cancer Biology Overview ● ● ● ● ● Homeostasis: Purposeful maintenance of a stable environment through coordinated physiologic processes that oppose change Disrupted homeostasis = Stress Eustress: Positive stress that stimulates a person Distress: Negative stress that stimulates a person Stress can induce a physical response and is influenced by the mind-body connection Types of stress stimuli ● ● ● Psychologic/emotional (fear, social rejection) Physical (temperature changes, abuse) Physiologic (infection, inflammation) Stressors ● ● Challenging demands on the body that arouse a response Trauma/surgery, intense exercise, severe disease/infection, systemic hypoxia, temperature extremes, pain, emotional distress, severe hemorrhage Stress and Personality ● ● Interdependent processes moderated by stressor type, intensity, duration, individual perception, appraisal, and coping ability Psychosocial distress manifests as physiologic, emotional, cognitive, and behavior changes ● Linked to chronic disorders if severe Coping ● ● ● ● May be adaptive or maladaptive Problem-focused coping and social support are beneficial Maladaptive coping may contribute to adverse health effects Exact effects still unknown, but may include suppression of immune response Physical Responses to Stress ● ● ● Acute stress: Response to intermittent stimuli, intensity varies and ends after threat avoidance Chronic stress: Prolonged activation of stress response linked to diminishing immunity, cancer, heart disease, depression, and other illnesses Post-traumatic stress disorder (PTSD): Higher-level stress response due to extreme stress Homeostasis ● ● Purposeful maintenance of a stable environment through coordinated physiologic processes that oppose change Maintained by adaptive responses and various sensing, feedback, and control mechanisms Glucose Control in Homeostasis ● ● ● Control systems and negative feedback loop regulate blood glucose levels Glucose sensor in beta cells Insulin regulates glucose release and removal from the blood