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Nervous System

what is the nervous system divided into? the Central Nervous System with the brain and spinal cord and the peripheral nervous system, which connects everything to the brain and spinal cord.
Draw, imagine, or explain the Nervous system structure? (use your notes to check if your answer is correct?
What does the Brain do? Receives and processes sensory information, initiates responses, stores memories, generates thoughts and emotions.
What does the Spinal Cord do? Conducts signal to and from the brain, controls reflex activities.
What do Motor Neurons do? It connects the Central Nervous System to muscles and glands.
What do Sensory Neurons do? It connects sensory organs to the Central Nervous System
What is the Somatic Nervous System? It controls voluntary movements.
What does the Autonomic Nervous System? Control involuntary responses
What is the Sympathetic Division? Controls reflex movement, like blocking a punch or dodging a ball.
What is the Parasympathetic Division? It controls involuntary organ movement, like digesting food, or sleeping when tired.
what are the functions of the Nervous System Sensory input - gathering information, Integration - to process and interpret sensory input and decide if action is needed, and Motor output
What is Sensory input, regarding the functions of the Nervous System? to monitor changes occurring inside and outside the body
What is motor output, regarding the functions of the Nervous System? A response to stimuli and activates muscles or glands.
What is the sensory (afferent) division in the peripheral Nervous System? Nerve fibers that carry information TO the central nervous system.
What is the motor (efferent) division in the peripheral nervous system? Nerve fibers that carry impulses AWAY FROM the central nervous system. Includes Somatic system (voluntary) and Autonomic system (involuntary)
What is the Autonomic Nervous System The involuntary branch of the nervous system. It consists of only motor nerves and is divided into two divisions, Sympathetic division (involuntary reflex response) and parasympathetic division (involuntary organ responses)
What are neurons/nerve cells Cells specialized to transmit electro-chemical messages
What are the major regions of neurons? The cell body: nucleus and metabolic enter of the cell, and the processes: fibers that extend from the cell body
What is in a Neuron? Dendrites, Cell body (soma), axons, Schwann cells, and Nodes of Ranvier
What do dendrites do in a neuron? Conducts impulses towards the cell body.
What does the Cell body (soma) do in a neuron? contains organelles & Nissl substance
What do axons do in a neuron? Conduct impulses away from the cell body
What do Schwann cells do in a neuron? produces myelin sheaths in jelly-roll like fashion
What are the Nodes of Ranvier? gaps in myelin sheaths along the axon.
What are the different types of Neurons? Sensory (afferent) neurons, Interneurons (association) the connector, and Motor (efferent) neurons
What do sensory (afferent) neurons do? Carry impulses from the sensory receptors
What do the sensory (afferent) neurons consist of? Cutaneous sense organs and receptors which detect stretch or tension
What do motor (efferent) neurons do? Carry impulses from the central nervous system
How does the peripheral nervous system works? 1.You gather information from you sensory receptor 2. info sent through your sensory (afferent) neurons (Sensory Input) to brain and spinal chord using inter neurons (Integration) 3. Sent to the effector through motor (efferent) neurons (Motor output)
What is the difference between sensory and motor neurons. In a sensory neurons the nucleus is in the middle, but in a motor neuron the cell body is at the end with the dendrites.
What happens when a synapse occurs? 1. Neurotransmitter is released from a neuron's axon terminal. 2. the dendrite of the next neuron has receptors that are stimulated by the neurotransmitter. 3. an action potential is released from the dendrite and gathers the message needed
What is a synapse? the space between two neurons of the same type
What is a reflex? rapid, predictable, and involuntary responses to stimuli
What is the reflex arc? the direct route from a sensory neuron, to an interneuron, to an effector
What is a mono synaptic reflex? Direct communication between sensory and motor neuron (does not go through brain)
What is poly synaptic reflex? Inter neuron facilitates sensory-motor communication (goes through brain)
what does your brain do? Interprets the information it gets through your senses in order to monitor and regulate your body as well as being responsible for thinking, learning, memory and emotion.
What is your brain like at the age of 3? It has many synapses. In fact it has 2-3 times more synapses than an adult.
What happens as your brain matures after the age of 3? It prunes synapses to make it more efficient.
Created by: kaylee72sommers