Nervous System & Endocrine System Nervous System: Sending messages fast but they don’t last long Endocrine System: Sending messages slowly but they last.

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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 SensoryMotor Interneurons

Spinal Cord Brain Sensory Neuron Sensory Neurons INPUT From sensory organs to the brain and spinal cord Drawing shows a somatic neuron

Spinal Cord Brain Sensory Neuron Motor Neuron Motor Neurons OUTPUT From the brain and spinal cord, to the muscles and glands

Spinal Cord Brain Sensory Neuron Motor Neuron Interneurons Interneurons carry information between other neurons only found in the brain and spinal cord

The Reflex Works by bypassing the brain so you can react quicker. Sensory Neuron Interneuron Motor Neuron

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

Central nervous system Peripheral nervous system The Nervous System: It breaks down into two parts.

Sympathetic and parasympathetic divisions of the nervous system

Summary of autonomic differences Autonomic nervous system controls physiological arousal Sympathetic division (arousing) Parasympathetic division (calming) Pupils dilate EYES Pupils contract Decreases SALIVATION Increases Perspires SKIN Dries Increases RESPERATION Decreases Accelerates HEART Slows Inhibits DIGESTION Activates Secrete stress hormones ADRENAL GLANDS Decrease secretion of stress hormones

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