Nervous System

name divisions of the nervous system

CNS (brain and spinal cord) and PNS (somatic- voluntary, autonomic-involuntary, enteric nervous system)

describe differences and relationships between divisions of the nervous system

motor system

efferent; conducts nerve impulses from the CNS to muscles and glands

sensory system

afferent; consists of variety of different receptors as well as sensory neurons

general direction of impulse transmission in different functional nervous system (sensory vs motor)

define basic reflex arc

monosynaptic reflex. ex: pinch evokes reflex pulling of limb away from stimulus

sensory receptor > sensory ganglion > dorsal horn of spinal cord > synapse on motor neuron in ventral gray matter > motor neuron leaves via ventral horn > innervation of motor organ (muscle)

cell body of neuron

soma; contains nucleus

dendrites (spiny vs non)

receives signals from other neurons

spines thought to be target for excitatory synaptic input

axon

allows signals to be transmitted from one part of the brain to another. often coated in myelin sheath (protective coating) in vertebrates

axon hillock

generation of action potentials

nissl substance, granules

contain RNA, invovled with production of proteins

outline organisation of nervous system

describe functional anatomy of a neuron

explain electrical events that lead to an action potential

describe and explain factors that affect the rate of nerve conduction

explain difference between action potential and graded potential

outline how neurons communicate at synpases

define synaptic potential

synaptic potential compared to action potential

draw neuromusclar junction

outline major electrical and chemical events at a neuromuscular junction

compare and contrast synpase with neuromuscular junction

describe organisation of sympathetic nervous system

describe organisation of parasympathetic nervous system

name maine autonomic neurotransmitters and receptors and where they’re found

explain the role of the adrenal medulla in the sympathetic response

describe functions of parasympathetic nervous system

describe functions of sympathetic nervous system

describe flight or flight response

give examples of important classes of autonomic drugs and how they act