Podcast
Questions and Answers
Which neurotransmitter is primarily associated with the sympathetic nervous system?
Which neurotransmitter is primarily associated with the sympathetic nervous system?
The parasympathetic nervous system functions to conserve energy.
The parasympathetic nervous system functions to conserve energy.
True
What are the two divisions of the autonomic nervous system?
What are the two divisions of the autonomic nervous system?
Sympathetic and Parasympathetic
The sympathetic nervous system helps to ______ the pupils.
The sympathetic nervous system helps to ______ the pupils.
Signup and view all the answers
Match the following functions with their corresponding division of the autonomic nervous system:
Match the following functions with their corresponding division of the autonomic nervous system:
Signup and view all the answers
Which division of the autonomic nervous system is responsible for the 'fight or flight' response?
Which division of the autonomic nervous system is responsible for the 'fight or flight' response?
Signup and view all the answers
The parasympathetic nervous system is responsible for increasing heart rate.
The parasympathetic nervous system is responsible for increasing heart rate.
Signup and view all the answers
Name one function regulated by the autonomic nervous system.
Name one function regulated by the autonomic nervous system.
Signup and view all the answers
The integration center for the autonomic nervous system is located in the ________.
The integration center for the autonomic nervous system is located in the ________.
Signup and view all the answers
Match the following autonomic functions with their corresponding nervous system division:
Match the following autonomic functions with their corresponding nervous system division:
Signup and view all the answers
Which neurotransmitter is primarily involved in the sympathetic nervous system response?
Which neurotransmitter is primarily involved in the sympathetic nervous system response?
Signup and view all the answers
The autonomic nervous system functions solely without any input from the central nervous system.
The autonomic nervous system functions solely without any input from the central nervous system.
Signup and view all the answers
Which fiber type secretes norepinephrine?
Which fiber type secretes norepinephrine?
Signup and view all the answers
The parasympathetic nervous system is also known as the 'fight-or-flight' system.
The parasympathetic nervous system is also known as the 'fight-or-flight' system.
Signup and view all the answers
What are the primary neurotransmitters involved in the autonomic nervous system?
What are the primary neurotransmitters involved in the autonomic nervous system?
Signup and view all the answers
The __________ division of the autonomic nervous system is responsible for energy conservation, especially in digestion.
The __________ division of the autonomic nervous system is responsible for energy conservation, especially in digestion.
Signup and view all the answers
Match the following receptors with their corresponding types:
Match the following receptors with their corresponding types:
Signup and view all the answers
What effect does the sympathetic nervous system NOT promote?
What effect does the sympathetic nervous system NOT promote?
Signup and view all the answers
Muscarinic receptors are found in synapses between pre- and postganglionic fibers.
Muscarinic receptors are found in synapses between pre- and postganglionic fibers.
Signup and view all the answers
Name two actions associated with the 'D' division of the parasympathetic nervous system.
Name two actions associated with the 'D' division of the parasympathetic nervous system.
Signup and view all the answers
What is the origin of the sympathetic nervous system?
What is the origin of the sympathetic nervous system?
Signup and view all the answers
The neurotransmitter primarily used by the parasympathetic nervous system is norepinephrine.
The neurotransmitter primarily used by the parasympathetic nervous system is norepinephrine.
Signup and view all the answers
What is the main function of the EpiPen in relation to the sympathetic nervous system?
What is the main function of the EpiPen in relation to the sympathetic nervous system?
Signup and view all the answers
The parasympathetic nervous system has a _______ preganglionic fiber length and a _______ postganglionic fiber length.
The parasympathetic nervous system has a _______ preganglionic fiber length and a _______ postganglionic fiber length.
Signup and view all the answers
Which cranial nerve is primarily responsible for parasympathetic outflow to the heart and lungs?
Which cranial nerve is primarily responsible for parasympathetic outflow to the heart and lungs?
Signup and view all the answers
The sympathetic nervous system has extensive branching of its fibers.
The sympathetic nervous system has extensive branching of its fibers.
Signup and view all the answers
Match the cranial nerves to their functions in the parasympathetic nervous system:
Match the cranial nerves to their functions in the parasympathetic nervous system:
Signup and view all the answers
In sympathetic nervous system pathway, the ganglia are located _______ from the effector organ.
In sympathetic nervous system pathway, the ganglia are located _______ from the effector organ.
Signup and view all the answers
Study Notes
Autonomic Nervous System Overview
- The autonomic nervous system (ANS) is a part of the peripheral nervous system.
- It controls involuntary functions like heart rate, digestion, and blood pressure.
- The ANS has two main divisions: sympathetic and parasympathetic.
Sympathetic Nervous System
- Origin: Thoracolumbar (T1-L2) spinal cord.
- Fiber Length: Short preganglionic fibers, long postganglionic fibers.
- Ganglia/Synapse: Ganglia are located close to the spinal cord, far from the effector organ.
- Branching: Extensive branching.
- Neurotransmitter: Primarily norepinephrine (sometimes acetylcholine).
- Function: "Fight or flight" response; mobilizes body resources for stressful situations.
- Examples of effects: Increased heart rate, dilation of pupils, increased blood flow to muscles, decreased digestive activity.
Parasympathetic Nervous System
- Origin: Craniosacral (CNs, S2-S4) spinal cord.
- Fiber Length: Long preganglionic fibers, short postganglionic fibers.
- Ganglia/Synapse: Ganglia are located near or within the effector organ.
- Branching: Minimal.
- Neurotransmitter: Primarily acetylcholine.
- Function: "Rest and digest" response; conserves energy and promotes relaxation.
- Examples of effects: Decreased heart rate, constriction of pupils, increased digestive activity, stimulation of urination.
Divisions and Function
- There is some overlap between the functions of the two divisions (e.g., both influencing heart rate) but their primary effect on body functions are different.
- Both systems work together to maintain homeostasis.
Cholinergic and Adrenergic Fibers
- Cholinergic fibers: Release acetylcholine (ACh) and act on cholinergic receptors.
- Adrenergic fibers: Release norepinephrine (NE) and act on adrenergic receptors.
- The type of receptors and neurotransmitters used in each system dictate the specific actions and effects it has in the body (e.g. heart rate increase due to norepinephrine in the sympathetic system, and slower heart rate due to acetylcholine in the parasympathetic nervous system).
Receptors
- Muscarinic receptors: G-protein-coupled receptors, found in effector cells.
- Nicotinic receptors: Ligand-gated cation channels, found in synapses between pre- and postganglionic fibers.
Additional Important Information
- The hypothalamus and the brain stem play a role in the overall integration of the ANS.
- The autonomic nervous system works to regulate involuntary bodily responses.
- Different body organs often respond differently to the same stimulus via the ANS depending on their needs.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore the intricacies of the autonomic nervous system (ANS), a vital component of the peripheral nervous system. This quiz covers the sympathetic and parasympathetic divisions, detailing their functions, origins, and effects on the body. Test your understanding of how these systems control involuntary bodily functions!
