Textbook Question
The white rami communicantes contain what kind of fibers?
a. Preganglionic parasympathetic
b. Postganglionic parasympathetic
c. Preganglionic sympathetic
d. Postganglionic sympathetic
547
views
14. The Autonomic Nervous System
Parasympathetic Nervous System
Problem 9c
Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
c. The parasympathetic nervous system releases acetylcholine onto all its synapses.
Verified step by step guidance1
Step 1: Understand the role of the parasympathetic nervous system (PNS). The PNS is part of the autonomic nervous system responsible for 'rest and digest' functions, such as lowering heart rate and promoting digestion.
Step 2: Recall the neurotransmitter used by the parasympathetic nervous system. The PNS primarily uses acetylcholine (ACh) as its neurotransmitter at both preganglionic and postganglionic synapses.
Step 3: Analyze the statement provided. The statement claims that the parasympathetic nervous system releases acetylcholine onto all its synapses. This is true because acetylcholine is released at both the synapse between the preganglionic and postganglionic neurons, and at the synapse between the postganglionic neuron and the target tissue.
Step 4: If the statement were false, identify the correction. For example, if the statement incorrectly mentioned another neurotransmitter like norepinephrine, the correction would be to specify that acetylcholine is the neurotransmitter used by the parasympathetic nervous system.
Step 5: Confirm the accuracy of the statement based on your understanding of the parasympathetic nervous system and its neurotransmitter usage. In this case, the statement is true and does not require correction.
Verified video answer for a similar problem:This video solution was recommended by our tutors as helpful for the problem above
Was this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Parasympathetic Nervous System
The parasympathetic nervous system is a component of the autonomic nervous system responsible for promoting 'rest and digest' functions. It conserves energy by slowing down the heart rate and increasing intestinal and gland activity. Understanding its role is crucial for evaluating statements about its neurotransmitter actions.
Recommended video:
1:56
Function of the Parasympathetic Nervous System
Acetylcholine
Acetylcholine is a neurotransmitter that plays a key role in transmitting signals in both the central and peripheral nervous systems. In the context of the parasympathetic nervous system, it is primarily released at synapses to facilitate communication between neurons and target organs. Recognizing its specific functions helps clarify the accuracy of statements regarding synaptic transmission.
Recommended video:
Guided course
5:56A. Events at the Neuromuscular Junction
Synaptic Transmission
Synaptic transmission refers to the process by which neurotransmitters are released from one neuron and bind to receptors on another, allowing for communication between nerve cells. This process is essential for understanding how signals are propagated in the nervous system, including the specific actions of the parasympathetic nervous system and the role of acetylcholine in this context.
Recommended video:
02:52Types of Electron Microscopes
1:56mWatch next
Master Function of the Parasympathetic Nervous System with a bite sized video explanation from Bruce Bryan
Start learningRelated Videos
Related Practice