Chapter 4.1 Flashcards
describes our awareness of internal and external stimuli. A continuum that ranges from full awareness to a deep sleep
Consciousness
Hunger, pain, thirst sleepiness and being aware
Internal Stimuli
Seeing the light, feeling the warmth, and hearing the voice of a friend
External Stimuli
Relatively low levels of physical activity and reduced sensory awareness
Sleep
High levels of sensory awareness, thought, and behavior
Wakefulness
What are other states of consciousness?
Intoxication, meditative and hypnotic states, sleep deprivation.
Internal rhythms of biological activity
Ex: a woman’s menstrual cycle
Biological Rhythms
A biological rhythm that takes place over a period of 24 hours
Ex: our sleep-wake cycle
Circadian Rhythm
What is the main center of homeostatis
The pituitary gland
Which area of the hypothalamus is the brain’s clock mechanism?
Suprachiasmatic nucleus (SCN)
Which gland release melatonin in the body?
The pineal gland
How is release of melatonin regulated?
Stimulated by darkness and inhibited by light
What refers to the brain’s control of switching between sleep and wakefulness
Sleep regulation
Collection of symptoms that results from the mismatch between our internal circadian cycles and our environment.
Symptoms include fatigue, sluggishness, irritability, and insomnia
Jet lag
a person may work from 7-3 then 3-11 to 10-7
Rotating Shift Work
