Constitutional isomer (skeletal isomer; structural isomer): One molecule in a set of isomers that differ in the order the atoms are connected. The term ' structural isomer ' is vague (all isomers differ in their structure) and should be avoided. Three Constitutional Isomers of C 5 H 8.
Text Preview. Homeostasis is the maintenance of a constant environment in response to internal and external stimuli. The body requires the constant and healthy environment that only homeostasis can provide Without this environment the body wouldnât be able to carry out the life support process.omeostasis is the maintenance of a constant environment in response to internal and external stimuli.
1 Feedback regulation mechanisms are important to homeostasis. 2  Feedback regulation occurs when the response to a stimulus has an effect of some kind on the original stimulus. 3  The type of response (increase or decrease in the stimulus) determines what the feedback is called. The homeostatic balance of most organs and organ systems is controlled by hormones secreted from the pituitary gland, a part of the endocrine system. 2  When the cells in your body do not work correctly, homeostatic balance is disrupted. 3  Homeostatic imbalance may lead to a state of disease.