The Nervous System Anatomy Final Exam review Latest Update 2025-2026 50 Questions and 100% Verified Correct Answers Guaranteed A+ absolute refractory period - CORRECT ANSWER: Sodium channels open or inactivated No action potential possible
action potential - CORRECT ANSWER: the propagated electrical message of a neuron that travels along the axon to the presynaptic axon terminals
action potentials are transmitted - CORRECT ANSWER: from pre-synaptic neuron to
post synaptic neuron across a synapse
Activation of Na+ Channels causes - CORRECT ANSWER: -rapid depol
-Na+ ions rush to cytoplasm -Inner membrane changes from (-) to (+)
afferent division - CORRECT ANSWER: carries sensory information from PNS sensory receptors to CNS
afferent nerve fibers - CORRECT ANSWER: axons that carry information inward to the central nervous system from the periphery of the body
all or non principle - CORRECT ANSWER: single neurons or single motor units respond completely or not at all to an electrical stimulus
Anatomical Divisions of the Nervous System - CORRECT ANSWER: Central Nervous
System (CNS) and Peripheral Nervous System (PNS)
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ascending tracts - CORRECT ANSWER: carry sensory information to the brain
autonomic nervous system - CORRECT ANSWER: controls subconscious
actions:contractions of smooth muscle and cardiac muscle and glandular secretions
central nervous system consists of - CORRECT ANSWER: brain and spinal cord
Decussation - CORRECT ANSWER: The anatomical crossing over of neurons from left
to right
descending tracts - CORRECT ANSWER: carry motor commands to spinal cord
effectors - CORRECT ANSWER: Respond to efferent signals
Cells and organs
efferent division - CORRECT ANSWER: carries motor commands from CNS to PNS
muscles and glands
efferent division contains - CORRECT ANSWER: somatic nervous system and
autonomic nervous system
Four Steps in the Generation of Action Potentials - CORRECT ANSWER: 1.)
Depolarization to threshold 2.) Activation of Na+ Channels 3.) Inactivation of Na+ channels, activation of K+ channels 4.) Return to normal permeability
function of CNS is to process higher functions - CORRECT ANSWER: of brain,
intelligence, memory, learning, emotion
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