18 Questions
What is the main function of the divisions of the Autonomic Nervous System?
Maintain homeostasis
Which division of the Autonomic Nervous System is associated with the 'fight or flight' response?
Sympathetic division
Where does the sympathetic chain ganglia receive signals from?
Thoracic and superior lumbar nerves
What type of fiber extends from the sympathetic ganglion to the target effector?
Long, unmyelinated fiber
Where do preganglionic fibers in the parasympathetic division lead to?
Terminal ganglia near the target effector
What receives direct connection from preganglionic fibers in the sympathetic division to release molecules?
Adrenal medulla
What is the second signaling molecule in the adrenergic synapse?
Epinephrine
Which type of receptor does norepinephrine bind to in the adrenergic synapse?
Alpha receptor (3 types)
In the autonomic system, what is the specific function of baroreceptors?
React to stretch stimuli in the aorta and carotid arteries
What is the specific feature of the efferent branch in autonomic reflexes and homeostasis?
Relays signals directly to the target effector
Which type of synapse is completely peripheral and elicits a local response?
Short reflex synapse
What conscious perception of autonomic sensation involves referred pain?
Perception reflecting autonomic sensation in one region but felt in another
Which part of the brain is responsible for regulating autonomic and endocrine function?
Hypothalamus
What effect does nicotine have on the autonomic nervous system?
Causes sympathetic increase in blood pressure
Which drugs enhance adrenergic function by binding to receptors and increasing norepinephrine production and release?
Cocaine and caffeine
Which pathway is responsible for communication in the hypothalamus?
Medial forebrain bundle and dorsal longitudinal fasciculus
What is the role of the medulla in the autonomic nervous system?
Connects to cardiac accelerator nerves and vasomotor nerves
What is the main effect of sympatholytic drugs?
Interrupts sympathetic activity
Test your knowledge of the divisions of the autonomic nervous system, including the functions and characteristics of the sympathetic and parasympathetic divisions.
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