Autonomic Nervous System- Picmonics
Regarding the autonomic nervous system, which of the following is true about preganglionic neurons?
All Preganglionic Neurons Release Acetylcholine
Regarding the autonomic nervous system, which of the following best describes how the effects of the sympathetic and parasympathetic nervous system relate to one another?
Antagonistic Effects of Sympathetic and Parasympathetic Nervous Systems
Regarding the autonomic nervous system, which of the following best describes the physiological response of the sympathetic nervous system?
Fight or Flight
All Preganglionic Neurons Release Acetylcholine
In the autonomic nervous system, all preganglionic neurons use acetylcholine as a neurotransmitter.
Regarding the autonomic nervous system, which of the following sub-systems primarily uses the vagus nerve for innervation and functions to stimulate excretory and digestive organs?
Parasympathetic Nervous System
Regarding the autonomic nervous system, which of the following neurotransmitters is most used by the parasympathetic postganglionic neurons?
Parasympathetic Postganglionic Neurons Release Acetylcholine
Regarding the autonomic nervous system, which of the following best describes the physiological response of the parasympathetic nervous system?
Rest and Digest
Regarding the autonomic nervous system, which of these sub-systems dominates against perceived threats?
Sympathetic Nervous System Explanation
Regarding the autonomic nervous system, which of the following is true about postganglionic neurons?
Sympathetic Postganglionic Neurons Release Norepinephrine
Sympathetic Postganglionic Neurons Release Norepinephrine
Sympathetic postganglionic neurons release norepinephrine as a neurotransmitter to excite or inhibit other cells.
Parasympathetic Postganglionic Neurons Release Acetylcholine
The parasympathetic postganglionic neurons use acetylcholine as a neurotransmitter rather than norepinephrine. Thus, in the parasympathetic system, the primary neurotransmitter used for all neurons is acetylcholine.
Antagonistic Effects of Sympathetic and Parasympathetic Nervous Systems
The sympathetic and parasympathetic nervous systems have antagonistic effects to each other, so only one can be active at the same time.
Sympathetic Nervous System
constantly active to maintain homeostasis in the body, but has a very specific response mechanism against perceived threats
Parasympathetic Nervous System
involves stimulating excretory and digestive organs and has antagonistic effects to the sympathetic nervous system. Innervation occurs primarily via the vagus nerve.
Rest and Digest
response of the parasympathetic nervous system stimulates organs that help the body eat and relax; blood flow increases to digestive and excretory organs; blood flow decreases to heart and skeletal muscle
Fight or Flight
response to perceived threats enables humans to either fight off the threat or run away quickly; Blood flow increases to the heart and skeletal muscle and decreases to GI tract and kidneys; breathing and heart rate increases
