The example of stress I would like to give is care giver stress.

Care Giver Stress

Homeostasis – the tendancy of biological systems to maintain relatively constant conditions in the internal environment while continuously interacting with and adjusting to changes originating within or outside the system. (medical-dictionary.thefreedictionary.com/homeostasis.)
The composition of the internal environment is maintained within narrow limits, and this fairly constant state is called homeostasis. Literally, this term means 'unchanging', but in practice it describes a dynamic, ever-changing situation kept within narrow limits. When this balance is threatened or lost, there is a serious risk to the well-being of the individual. There are many factors in the internal environment which must be maintained within narrowlimits and some of these are listed in Box 1.1.Homeostasis is maintained by control systems which detect and respond to changes in the internal environment. A control system (Fig. 1.3) has three basic components: detector, control centre and effector. The control centre determines the limits within which the variablefactor should be maintained. It receives an input from thedetector or sensor, and integrates the incoming information. When the incoming signal indicatesthat an adjustment is needed the control centre responds and its outpu to the effector is changed. This is a dynamic process that maintains homeostasis. (Ross and Wilson) page 5Adrenaline and noradrenaline
Noradrenaline is the postganglionic neurotransmitter of

Waugh, A., Grant, A., & Ross, J. S. (2001). Ross and Wilson Anatomy and Physiology in Health and Illness. Churchill the sympathetic division of the autonomic nervous system (see Fig. 7.9, p. 146). Adrenaline and some noradrenaline are released into the blood from the adrenal medulla during stimulation of the sympathetic nervous system (see Fig. 7.43, p. 171). They are structurally very similar and this explains their similar effects. Together they potentiate the fight or flight response after initial sympathetic stimulation by:
• increasing heart rate
• increasing blood pressure
• diverting blood to essential organs including the heart, brain and skeletal muscles by dilating their blood vessels and constricting those of less essential organs, such as the skin
• increasing metabolic rate
• dilating the pupils.
Adrenaline has a greater effect on the heart and metabolic processes whereas noradrenaline has more influence on blood vessels.
Response to stress
When the body is under stress homeostasis is disturbed.
To restore it and, in some cases, to maintain life there are immediate and, if necessary, longer-term responses.
Stressors include exercise, fasting, fright, temperature changes, infection, disease and emotional disturbances/ situations.
The immediate response is sometimes described as preparing for 'fight or flight'. This is mediated by the sympathetic part of the autonomic nervous system and the principal effects are shown in Figure 9.12.
In the longer term, ACTH from the anterior pituitary
Now highlight how being a care giver can cause stress, biologically, psychologically and physiologically