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level: Level 1

Questions and Answers List

Question	Answer
Sensory afferent	Stimulus
Motor efferent	Response
the brain the spinal cord	Central Nervous System (CNS)
neuronal tissues outside the CNS	Peripheral Nervous System (PNS)
largely concerned with consciously controlled functions such as movement, respiration, and posture	Somatic Nervous System
• largely independent (autonomous) in that its activities are not under direct conscious control • concerned primarily with visceral functions such as cardiac output, blood flow to various organs, and digestion, which are necessary for life	Autonomic Nervous System ANS
These systems have afferent (sensory) inputs that provide information regarding the internal and external environments and modify motor output through reflex arcs of varying size and complexity	BOTH Autonomic & Somatic NS
In the NS, chemical transmission occurs between __ and between nerve cells and their __ Chemical transmission takes place through the release of small amounts of transmitter substances from the __ into the __	nerve cells, effector cells nerve terminals, synaptic cleft
1) 1-neuron set-up 2) 2-neuron set-up	1 SNS 2 ANS
Synaptic neurotransmission PROCESS	1 Action Potential arrives at axon terminal 2 Voltage gated Ca2+ channels open 3 Ca2+ enters the presynaptic neurons 4 Ca2+ signals to neurotransmitter vesicles 5 Vesicles move to the membrane and dock 6 Neurotransmitters released via exocytosis 7 Neurotransmitters bind to receptors 8 Signal initiated in postsynaptic cell