HUMB1000 Study Guide - Final Guide: Sensory System, Autonomic Nervous System, Acetylcholine
10 Jun 2018
School
Department
Course
Professor
Nervous system
Functions:
• Maintaining homeostasis
• Receives internal and external sensory output
• Integrating information
• Motor output
• Establish and maintain mental activity
Autonomic and Somatic Nervous System
Characteristic
Autonomic division
Somatic division
Effectors
Heart muscle, involuntary
muscle, glands
Skeletal (voluntary) muscles
General function
Adjustment of the internal
environment (homeostasis)
Response to the external
environment
Efferent pathways
Two nerve fibres from the
CNS to the effector with a
synapse in a ganglion
One nerve fibre from the CNS
to the effector; no synapse
and no ganglion
Neurotransmitter at
effector
Acetylcholine or noradrenaline
Acetylcholine
Control
Usually involuntary
Usually voluntary
Nerves to target organ
Two sets – sympathetic and
parasympathetic
One set
Effect on target organ
Excitation or inhibition
Always excitation
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