Autonomic Nervous System Flashcards
How many neurons reach the effector in the somatic nervous system?
1
What types of neurotransmitters are in the somatic nervous system?
ACh
How many neurons reach the effector in the autonomic nervous system?
2+
Nervous system that is only excitatory
Somatic
Nervous system that is excitatory and inhibitory
Autonomic
What are the 2 efferent divisions of the Autonomic nervous system?
Sympathetic and parasympathetic
Where are autonomic ganglia located in the sympathetic division?
Near spinal cord
Where are autonomic ganglia located in the parasympathetic division?
Near target organ
What type of neurotransmitter is released in the preganglionic sympathetic division? Postganglionic?
ACh; N or NE
What type of neurotransmitter is released in the preganglionic parasympathetic division? Postganglionic?
ACh; ACh
Receptors that are stimulated by ACh
Cholinergic
Receptors that are stimulated by N or NE
Adrenergic
What are the 2 types of adrenergic receptors?
Alpha and beta
What are the 2 types of cholinergic receptors?
Nicotinic, muscarinic
Chemically gated ion channels; ACh always excites the postsynaptic cell with these receptors
Nicotonic
Stimulation activates a G-protein which activates or inactivates enzymes within the cell; longer lasting effects
Muscarinic
What happens to heart rate in the sympathetic? Parasympathetic?
Increase, decrease
What happens to the diameter of lungs in the sympathetic? Parasympathetic?
Dilate, constrict
What happens to the GI and urinary tract sphincters in the sympathetic? Parasympathetic?
Constrict, dilate
What happens to the diameter of blood vessels in the sympathetic? Parasympathetic?
Constrict or dialte; none
Mechanoreceptors that monitor change in pressure
Baroreceptors
Sensitive to change in pH and CO2/O2 in blood
Chemoreceptors
What are the 5 special senses?
Olfaction, gustation, hearing, vision, equilibrium
What 2 special senses must have stimulating molecules that must be dissolved?
Olfaction and gustation
What special sense is the most debilitating to lose?
Equilibrium