BIOA02H3 Chapter 44: Chapter 44 Study Guide
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Amygdala is the brain"s center for emotion and memory of fear. When cells in amygdale are activated, heart beats faster, breathing becomes rapid and shallow, hands get cold and clammy. A person with amygdale does not have reflex to pull away from a threat. cannot read nature, mood, or intentions of other by reading their facial expression. Nervous systems are composed of neurons and glia. Neurons are excitable and can generate and send action potential. Extensions of neuron are axons, which conduct action potential over long distance. Nerve is a bundle of axons that come from many neurons. Neurons are organized into 3 categories of cells: input, 2) integration, 3) output. Afferent neurons carry sensory information into nervous system. Sensory information comes from sensory neurons that convert input into action potential. Efferent neurons carry commands to effectors, like muscles and glands. Interneurons integrate information and facilitate communication between sensors and effectors.