18 Questions
Which component of the motor system is under conscious control?
Somatic nervous system
Where are the cell bodies of the preganglionic neurons in the autonomic nervous system located?
Central nervous system
Which part of the autonomic nervous system controls functions primarily of visceral organs?
Sympathetic nervous system
How many neurons are involved in each pathway of the autonomic nervous system?
Two neurons
Where do the axons of postganglionic neurons synapse in the autonomic nervous system?
Visceral effector organs
What neurotransmitter do all preganglionic neurons of the autonomic nervous system release?
Acetylcholine
Which system promotes salivation, urination, and defecation?
Parasympathetic nervous system
Which system lowers the heart rate and narrows the coronary arteries?
Parasympathetic nervous system
Which system dilates the pupils and encourages the eyes to receive more information?
Sympathetic nervous system
Which system narrows the bronchi and bronchioles?
Sympathetic nervous system
Which statement is true about the parasympathetic nervous system?
It promotes defecation and urination by tightening sphincters.
Which function is not associated with the sympathetic nervous system?
Dilates blood vessels in the skin
What controls the pupillary constrictor muscle?
Parasympathetic innervation
What is the effect of activating muscarinic receptors on the pupil?
Miosis
What type of innervation do sweat glands have?
Sympathetic
In the accommodation response, what leads to pupillary constriction?
Activation of cholinergic receptors
What happens when the parasympathetic system is activated in the gastrointestinal tract?
Food movement through the gut
Which receptors control the pupillary constriction muscle?
Muscarinic receptors
Learn about the somatic and autonomic components of the motor system. Understand the structure of the somatic pathways and the role of motoneurons in innervating skeletal muscle fibers.
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