Neuroscience and Behavior Objective Questions

Topics: Nervous system, Neuron, Brain Pages: 2 (357 words) Published: March 11, 2012
Chapter 2
Neuroscience and Behavior
AP Psychology

Psychologist study human biology lot gain a better understanding of sleep and dreams, depression and schizophrenia, hunger and sex, stress and disease. Neurons consist of a cell body, two branching fibers named dendrites and axons. The dendrites receives the information and the axon pass it along while Myelin Sheath insulates the axons of some neurons and helps speed their impulses. Nerve cells communicate with neurotransmitters. When the action potential reaches the knoblike terminals at an axons end, it triggers the release the release of chemical (Neurotransmitters). Dopamine influences movement, learning, attention, and emotion. Dopamine is also linked with schizophrenia. Serotonin affects mood, hunger, sleep, and arousal. Norepinephrine helps control alertness and arousal. Endorphin lessens pain and boosts mood. The central nervous system (CNS) and peripheral nervous system (PNS) are the major divisions in the nervous system. The brain and spinal cord form the CNS and the PNS links the CNS with the bodies sense receptors, muscles, and glands. The sensory neurons sends information from the bodies tissues and the sensory organs inward to the brain and spinal cord, which processes the information. Interneurons internally communicate and intervene between the sensory inputs and motor outputs. Motor neurons carry outgoing information from the CNS to the muscles and glands. The Neural Pathways governs our reflexes, our automatic responses to stimuli and illustrates the spinal cords work however in our brains, one neural networks is interconnected with other networks that do different things. Electroencephalogram is an amplified tracing of such waves by an instrument called an electroencephalograph. CT Scan examines the brain by taking x-ray photographs that can reveal brain damage. PET Scan depicts brain activity by showing each brain areas consumption of it's chemical fuel. MRI Scan is a technique that...
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