NROB60H3 Chapter Notes -Cardiac Muscle, Exocytosis, Autonomic Ganglion
Document Summary
Affects visceral organs and fat breakdown and hormone release. Involuntary control of smooth muscle, cardiac muscle, glands, adipose tissue. Most internal organs are under antagonistic control where one autonomic branch is excitatory, and the other is inhibitory. Sweat glands and (unspecified) smooth muscle: solely activated by sympathetic. Sometimes 2 autonomic branches work co-operatively e. g blood flow to penis = parasympathetic muscle contraction ejaculation = sympathetic. Grey matter: the dorsal root receives afferent (in coming) nerves; terminate in the dorsal horn, efferent (outgoing) nerves originate in the ventral horn; terminate on muscles / glands. Symp-leaves from thoracic and lumbar, parasymp- leaves from cranial and sacral region. Summary of functions of the sympathetic vs parasympathetic. Salivation, sweat and lymph glands (only ones controlled by sympathetic control: heart beat and volume, blood vessel and bronchioles dilation. Autonomic pathways have 2 efferent neurons in series: ganglion: the cns collection of nerve cells outside.
