What is stress? Any force that pushes the body out of optimum homeostatic conditions
Stressors include Digesting food, exercising, waking after a long sleep Walking outdoors after being indoors Impending happy event such as a wedding or party, falling in love Arguments , over work, exams
The General Adaptation Syndrome is A predictable set of behavioral defenses/activities that a body undertakes to cope with intense prolonged stress
The parts of our inborn ability to defend against the daily stressors known as innate immunity are Physical barriers : skin and mucous membranes …show more content…
Chemical messengers that trigger, regulate, and shut down homeostatic reactions are hormones
Cells of tissues and organs that specific hormones act upon are Target cells Hormones that are water soluble and cannot diffuse across cell membranes - and that affect target cells in seconds because they work with proteins that are already present in the target cell are Non-steroid hormones
Hormones that are lipid soluble and readily pass through cell and nuclear membranes of their target cells to make new proteins which alter the normal activity of the cell are Steroid hormones
Endocrine glands secrete Hormones directly into the blood …show more content…
Evolution is an internal response to impartial external forces
Evolution is a natural process and has no purpose or goal
Stratagraphic dating of fossils is a method where fossil age is determined by the layer of earth in which it was found
Radiometric dating of fossils is a method where slow decay occurs in half life and can be measured to calculate age of the fossil
The bottle neck effect is a cause for change in allele frequency and occurs when large portions of a population are suddenly removed and the remaining population may not have a gene pool that is representative of the original group
The founder effect is a cause for change in allele frequency in a population and occurs when a small group splinters off to form a new population elsewhere
Gene flow is a cause for change in allele frequency in a population and occurs when organisms move from one population to another, genes are taken away from one pool and added to the new pool
Ecology is the study of interactions between biotic and abiotic elements of an ecosystem
Carrying capacity is the number of individuals a population can support without permanently reducing