Final Exam Prep for:
Rio Salado Bio 201 Exam 3
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,Peripheral Nervous System (PNS) The part of the nervous system that includes
cranial nerves, spinal nerves, and ganglia.
CNS structures The brain and spinal cord.
PNS structures Cranial nerves, spinal nerves, and ganglia.
Function of the CNS To process, interpret, and coordinate sensory
data and motor commands.
Function of the PNS To transmit sensory input to the CNS and carry
motor commands to peripheral tissues and
systems.
,Neuron A specialized cell that conducts electrical
impulses in the nervous system.
Neuroglia Supporting cells that maintain homeostasis, form
myelin, and support neurons.
Myelin sheath function It insulates axons and increases the speed of
nerve impulse conduction.
Resting membrane potential About -70 mV, due to uneven distribution of ions
across the membrane.
Depolarization cause The influx of sodium ions (Na+) when sodium
channels open.
, Restoring resting potential The efflux of K+ ions and the sodium-potassium
pump.
Action potential A rapid change in membrane potential that
travels along an axon.
Threshold potential Typically around -55 mV, triggering an action
potential.
Phases of an action potential Resting, depolarization, repolarization,
hyperpolarization.
Rio Salado Bio 201 Exam 3
** Expert-Verified Explanation
** Questions with Verified Answer
** New Edition |Updated
** 100% Guaranteed Pass
** 100% Correct Answers | Graded A+
,Peripheral Nervous System (PNS) The part of the nervous system that includes
cranial nerves, spinal nerves, and ganglia.
CNS structures The brain and spinal cord.
PNS structures Cranial nerves, spinal nerves, and ganglia.
Function of the CNS To process, interpret, and coordinate sensory
data and motor commands.
Function of the PNS To transmit sensory input to the CNS and carry
motor commands to peripheral tissues and
systems.
,Neuron A specialized cell that conducts electrical
impulses in the nervous system.
Neuroglia Supporting cells that maintain homeostasis, form
myelin, and support neurons.
Myelin sheath function It insulates axons and increases the speed of
nerve impulse conduction.
Resting membrane potential About -70 mV, due to uneven distribution of ions
across the membrane.
Depolarization cause The influx of sodium ions (Na+) when sodium
channels open.
, Restoring resting potential The efflux of K+ ions and the sodium-potassium
pump.
Action potential A rapid change in membrane potential that
travels along an axon.
Threshold potential Typically around -55 mV, triggering an action
potential.
Phases of an action potential Resting, depolarization, repolarization,
hyperpolarization.
