Using one or more examples, explain functions of two hormones in human behavior
*hormones: the chemical messengers that are produced by the glands that make up the endocrine system*
adrenaline is a hormone secreted from the adrenal gland that increases alertness. It stimulates the "flight or fight" response (prepares the body for action to help the organism deal with a threat, either by fighting it, or by running away from it), and although commonly assosiated with negative emotion (i.e. fear), it is also found in individuals who participate in extreme sports and recieve a positive rush of adrenaline. Adrenaline increases the flow of blood and oxygen to the brain by increasing the heart rate and dialating blood vessels, dialates pupils, and key resources (i.e. oxygen and glucose) are transfered away from external organs (i.e. digestive system) and towards the body's extremeties.
- 2. Melatonin: Melatonin is secreted from the pineal gland relying on signals from the eys and other sense organs to see light because melatonin is produced by darkness and inhibited by light. Melatonin is used to "turn-off" the body to sleep.
- -Seasonal Affective Disorder (SAD): a subcategory of depression characterized by sleepiness and lethargy because of reduced light levels that increase melatonin production.
- -Avery et al: (2001) - Melatonin light studt where three different light therapys were used to study melatonin levels: dawn stimulation timed to being at 4:30 am, traditional light therapy, and placebo of a dim red light at dawn. Those who recieved the traditoinal bright light therapy or placebo, who complained of insomnia, had less improvements than the dawn stimulation. This is related to the sleep patterns of the participants.