Module 8 Flashcards
Made outside the human body
Exogenous
Classification of synapses in the autonomic system meaning that norepinephrine is released
Adrenergic
The interior portion of the adrenal gland
Adrenal medulla
- Grouping of nerves cell bodies located outside the brain and spinal cord
- Grouping locations of cell bodies
Ganglion
Cause by thee molecules produced in the body
Endogenous
Chains of swellings along the length of a postganglionic fiber
Varicosity
A specific type of mechanoreceptor in the walls of the aorta and carotid sinuses that senses the stretch of those organs when blood volume or pressure increases
Baroreceptor
- Increases heart rate
- Dilates and constricts veins
- Contracts bladder sphincter
- Exciting activity
- Portion of the NS associated with fight-or-flight response
Sympathetic Nervous system
An irregular pattern of projection of conscious perception of visceral sensations
Referred pain
- Receptors for acetylcholine located in all autonomic ganglia and neuromuscular junctions
- Some CNS pathways
Nicotinic ACH receptor
- Exit at different spinal locations
- Note thee location and their proximity to the CNS
- An axon from the central neuron that projects to a sympathetic ganglion and represents thee output from the CNS to the ganglion
Preganglionic fiber
- the axon from a ganglionic neuron that projects to the target effector that represents the output of a ganglion that directly influences the organ
Postganglionic fiber
- Functions as a neurotransmitter in somatic nerve and parasympathetic nerve fibers
Acetylcholine
- Innervated by sympathetic and parasympathetic fibers
- One organ receiving sympathetic and parasympathetic output
Dual innervation
The organ, tissue or gland to be innervated
Target effector
- Decreases heart rate
- Relaxes bladder sphincter
- Chill
- Portion of the NS associated with the epithet of rest and digestion
Parasympathetic nervous system
- Situated anterior to the vertebral column and receive inputs from splanchnic nerves as well as central sympathetic neurons
Collateral ganglia
- Receptors for acetylcholine stimulated by postganglionic parasympathetic neurons
- Produces parasympathetic nerve effects in the heart, smooth muscle, and glands
Muscarinic ACh receptors
Often voluntarily controlled
Somatic motor
- Not usually voluntarily controlled
- visceral organs
Autonomic motor
Somatic and autonomic motor
Efferent division
____ and ____ muscle will still contract in absence of neural stimuli, innervation just inc or dec
Heart, smooth muscle
Afferent division and efferent division make up the…
Peripheral nervous system
Division of nervous system which transmits sensory info from somatic and visceral receptors and special sense organs to the CNS
- Visceral sensory
- Somatic sensory
- Special sensory
Afferent division