(Multiple Choice Question): The automatic nervous system is part of the peripher
ID: 66481 • Letter: #
Question
(Multiple Choice Question):
The automatic nervous system is part of the peripheral nervous system. What is the difference between the sympathetic and parasympathetic divisions?
A) During fight, flight and frolic, the sympathetic nervous system activates the skeletal muscle directly
B) Stimulation of the parasympathetic division will causean increase in heart rate
C) Parasympathetic division has the vagus nerve as one of its major components
D) Sympathetic division has preganglionic neuronsin the organs it innervates
Explanation / Answer
A) During fight, flight and frolic, the sympathetic nervous system activates the skeletal muscle directly.
In the sympathetic system, the three receptors are alpha, beta 1, and beta 2. Alpha receptors are found on the walls of the arteries. Alpha receptors make arteries constrict when neurons release the neurotransmitters epinephrine or norepinephrine. Beta 1 receptors are found in the heart, and neurotransmitters make Beta 1 receptors increase heart rate. Beta 2 receptors are found in the air passageways of the lungs called bronchioles. Beta 2 receptors are also found on the walls of the arteries that run through the skeletal muscles. These receptors allow for more air to travel in and out of the lungs and for an increased blood flow through the skeletal muscles.
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