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Transcript
Nervous System & Endocrine System Nervous System: Sending messages fast but they don’t last long Endocrine System: Sending messages slowly but they last a long time •Types of Neurons •Parts of the Nervous System •Glands & Hormones of the Endocrine System Endocrine System Uses hormones that travel through the bloodstream. Takes longer to get there but lasts a long time 3 types Neurons Types of Neurons Sensory Motor Interneurons Sensory Neurons • INPUT From sensory organs to the brain and spinal cord Drawing shows a somatic neuron Sensory Neuron Brain Spinal Cord Motor Neurons • OUTPUT From the brain and spinal cord, to the muscles and glands Sensory Neuron Brain Spinal Cord Motor Neuron Interneurons • Interneurons carry information between other neurons only found in the brain and spinal cord Sensory Neuron Brain Spinal Cord Motor Neuron The Reflex Works by bypassing the brain so you can react quicker. Sensory Neuron Interneuron Motor Neuron A Neural Chain A Neural Chain A Neural Chain A Neural Chain A Neural Chain A Neural Chain The Nervous System: Sends messages quickly but they don’t last long. Broken into two parts: • Central Nervous System (CNS) – Brain and spinal cord • Peripheral Nervous System (PNS) – Carries messages to and from CNS The Nervous System: It breaks down into two parts. Central nervous system Peripheral nervous system Sympathetic and parasympathetic divisions of the nervous system Summary of autonomic differences Autonomic nervous system controls physiological arousal Sympathetic division (arousing) Pupils dilate Parasympathetic division (calming) EYES Pupils contract SALIVATION Increases Perspires SKIN Dries Increases RESPERATION Decreases Accelerates HEART Slows Inhibits DIGESTION Activates Secrete stress hormones ADRENAL GLANDS Decrease secretion of stress hormones Decreases
