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4 main functions of the nervous system - Send impulses from the CNS - Send impulses to the CNS - Coordination of activities of all parts of the nervous system - Sensory functions that detect changes in the body
2 main branches of the nervous system Sympathetic/Parasympathetic
Electrical impulses that are transmitted from one nerve to another by various chemicals called Neurotransmitters
Afferent Sensory
Efferent Motor
The tendency of the body to maintain stability Homeostasis
Central nervous system consists of... Brain, brain stem & spinal cord
The somatic system relays motor impulses to what type of muscle? Skeletal
The autonomic system transmits motor impulses to what type of muscle? Smooth
What 2 main branches consist of the autonomic nervous system? Sympathetic & Parasympathetic
The PNS is divided into what 3 divisions? Somatic, autonomic & enteric
Small gaps that allow nerve impulses to travel from one neuron to another Synapses
Chemicals that are located in and released by neurons Neurotransmitters
Consists of neuron cell bodies & dendrites Gray matter
Consists of nerve fibers White matter
What is the largest part of the brain? Cerebrum
How do the two hemispheres communicate? Corpus callosum
What does the brain stem consist of? Mid brain (mescencephalon) Pons Medulla oblongata
Sends messages between the brain & the spinal cord Thalamus
Prevents certain molecules & substances from entering and damaging the brain Blood-brain barrier
Built in thermostat & appetite center Hypothalamus
What's another name for the mid brain? Mesencephalon
What protects the CNS? BBB, cerebrospinal fluid, vertebral column, meninges
The sympathetic system responds to what type of situations? HINT: "fight or flight" Stressful
What are the main NTs of the sympathetic system? Norepinephrine & epinephrine
Drugs that mimic natural sympathetic NTs are referred to as...? Sympathomimetics & adrenergics
Drugs that block sympathetic actions are called...? Sympatholytics
What is the main NT of the parasympathetic system? Acetylcholine
Drugs that mimic natural parasympathetic NTs are called...? Parasympathomimetics & cholingerics
Drugs that block parasympathetic actions are called Anticholingerics
Controls motor function, parts of speech, emotions, problem solving, reasoning & planning? Frontal lobe
Important in orientation, recognition, sensation & understanding language Parietal lobe
Important in control of perception and interpretation related to vison Occipital lobe
Important in receiving and integrating auditory stimuli and regulating emotion, personality & behavior Temporal lobe
Created by: xalasia