General
consists of spinal nerves, cranial nerves, receptors, sensory, motor and interneurons
What is the peripheral nervous system?
The structural and functional basis for involuntary actions; a rapid, automatic response to a stimulus.
What is a reflex?
increased neurotransmitter activity at the synapse, decreased neurotransmitter activity at a synapse and/or alteration of pain or mood
What is affects of drugs on the nervous system?
cervical, brachial, axillary, femoral and sciatic
What are spinal nerves?
secretes hormones directly into the blood
What is an endocrine gland?
connects the body to the brain and spinal cord
What is the peripheral nervous system?
group of nerve fibers that carry nerve impulses to the brain
What is the ascending tract?
any drug that inhibits transmission of sensory impulses at a synapse
What is a depressant?
These structures along with the 31 pairs of spinal nerves make up the sensory-somatic portion of the Peripheral nervous system.
What is 12 pairs of cranial nerves?
neurotransmitter that creates a sense of feeling good
What is dopamine?
motor pathways of the peripheral system that lead to skeletal muscles; voluntary control
What is the somatic nervous system?
the simplest of nerve pathways that include only a few neurons
What is a reflex arc?
any drug that speeds up the activities of the nervous system
What is a stimulant?
olfactory, trigeminal, vagus and oculomotor
What are cranial nerves?
part of the autonomic nervous system; most active under ordinary, restful conditions; counterbalances the effects of the fight-or-flight system
What is the parasympathetic division?
What is the motor pathways of the nervous system that lead to organs and glands; involuntary
What a
What is the autonomic nervous system?
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group of nerve fibers that carries nerve impulses from the brain down through he spinal cord
What is a descending tract?
which drug blocks the movement of calcium and sodium ions across the cell membrane
What is alcohol?
posterior portion of a spinal nerve; sensory
What is a dorsal root?
a slender nerve column that passes downward from the brain into the vertebral canal, beginning where nervous tissue leaves the cranial cavity
What is the spinal cord?
the fight or flight response of the autonomic nervous system
What is the sympathetic division?
knee-jerk reflex
What is the patellar reflex?
A stimulant drug that causes levels of neurotransmitters in the brain to increase
What is cocaine, caffeine, meth and amphetamines
anterior portion of a spinal nerve; motor
What is a ventral root?
becoming ill after stopping the use of drug
What is withdrawal?