A biological factor is anything that affects the function and behavior of a living organism, according to Psychology Dictionary. These factors can be physical, physiological, chemical, neurological, or genetic. Biological factors are the primary determinant of human behavior and are routinely examined when studying the causes of mental illness.Know More
WebMD states that the main biological factors implicated in mental illness are genetics, infection, brain defects or injury, prenatal damage and substance abuse. Due to the environmental factors which can influence the onset of mental illness such as trauma, abuse or stress, a person genetically predisposed to a mental illness may or may not finally express the illness.
Certain infections have been linked to brain damage and aggravation of mental illness symptoms. An example of such an infection is pediatric autoimmune neuropsychiatric disorder (PANDA); this affects children and is linked to obsessive compulsive disorder and some other mental illnesses, according to WebMD. The infection that triggers PANDA is caused by the streptococcus bacteria. Mental illness can occur due to defects or trauma to the brain as an adult or during fetal development. Long term substance abuse may cause anxiety, depression, or paranoia. Examples of other biological factors that can trigger mental illness are poor nutrition and exposure to toxins.Learn more about Biology
A physiological change is a change in the normal function of a living organism. An example of a physiological change is the everyday shedding of dead skin cells in humans.Full Answer >
Biological inheritance is broadly defined as physical heredity. Heredity, or inheritance in the biological sense, refers to the physical features that offspring inherit from their parents, such as eye color, shape of nose and mouth, height and other distinguishing physical characteristics.Full Answer >
Biological disasters are outbreaks of diseases or contagions of plant and animal life on an epidemic or pandemic level or infestations of animal or insect life on an epidemic or pandemic level. Examples of biological disasters include cholera and influenza H1N1 (swine flu).Full Answer >
A biological key, which is sometimes called a dichotomous key, is a tool used to determine the identity of an organism by answering a series of questions about the organism’s characteristics. Dichotomous keys usually include a series of questions where each of which has two possible answers. By answering the questions in sequence, the operator of the key can determine the identity of the plant, animal, fungi or other organism.Full Answer >