chemical substances that are stored in very tiny sacs within the terminal buttons and involved in transmitting information across a synaptic gap to the next neuron.
the body system consisting of a set of glands that regulate the activities of certain organs by releasing their chemical products into the blood stream.
the nervous system and endocrine system are intricately interconnected. they know that the endocrine system and brain's hypothalmus connects the nervous system and the endocrine system and that the two work together to control the body's activities.
an individual's observable characteristics
the most alert states of human consciousness; individuals actively focus their efforts toward a goal.
deep sleep coincides with the release of growth hormone in children. lack of sleep is stressful, stress hormones may interfere with the creation of neurons in the hippocampus (assoc with memory). memory about specific info, skills,, or emotional experiances.
1. sleep is characterized by drowsy sleep, person may experiance sudden muscle movements called myoclonic jerks.
2. muscles activity decreases, and the person is no longer consciously aware of the environment
3. and 4. characterized by delta waves, the slowest and highest amplitude brain waves during sleep. these two stages are often referred to as delta sleep. stage 3 is delta waves occuring less than 50%, 4 is greater than 50%. Deepest sleep.
either a physical or psychological dependence, or both, on a drug. *its a process.
psychoactive drugs increase dopamine levels in the brain's reward pathways. dopamine helps control voluntary movements, affects sleep, mood, attention, learning, and ability to recognize rewards in the environment.
depressants - slow down mental and physical activity.
stimulants - increase the central nervous system's activity (caffine, nicotine, amphetamines, cocaine, ecstasy).
hallucinogens - modify the person's perceptual experiences and produce visual images that aren't real (marijuana, LSD)