Chapter 9 The Autonomic Nervous System
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Characteristics of Somatic Nervous System
Relates to the body Voluntary Movement Muscle cell excitation
Characteristics of Autonomic Nervous System
Involuntary/unconscious Regulates cardiac, smooth and glands Excitation or inhibitory Sympathetic and Parasympathetic
What is the number of neurons from the CNS to effector in both the Somatic and Autonomic system
Somatic = 1 Autonomic = 2
Name the two neuron organisations in the autonomic system
Preganglionic neurons Postganglionic neurons
What do Preganlionic neurons have and where
Cell bodies in the CNS
What do Postganlionic neurons have and where
Cell bodies in the autonomic ganglia
List the Sympathetic division
NE released from postganglionic neuron E released from adrenal medulla ACh released from preganglionic neuron Causes: Increased... Heart rate Blood glucose concentration Blood flow to skeletal muscles Pupil Dilation
List the Parasympathetic division
ACh released from preganglionic neurons and most postganglionic neurons Opposite effects: Slowed heart rate Dilation of visceral organs blood vessels Increased digestive activity