WSU Bio 315 Lecture Exam 2 with
correct answers 100% 2026
Neurons - Correct Answer -conduct electrical impulses along the plasma membrane (action
potentials)
-can live and function for a lifetime
-do not divide
-high metabolic rate requiring lots of oxygen and glucose
Nissl bodies - Correct Answer Densely packed, flattened sacs of rough ER and free ribsosomes
that renew membranes and make proteins found in cell body of a neuron
Dendrites - Correct Answer Transmit electrical signals toward the cell body and function as
receptive sites
Axons - Correct Answer They produce and conduct action potentials and transmit impulses
away from the cell body
Axon hillock - Correct Answer initial segment of axon that generates action potentials
Multipolar neurons - Correct Answer 2 processes-Usually many dendrites and one axon; 99% of
all neurons
Bipolar neurons - Correct Answer 2 processes extending from opposite ends of cell body
Unipolar neurons - Correct Answer 1 process that emerges from cell body and divides like letter
T
Synapses - Correct Answer Elaborate cell junctions that signals pass across in one direction
,Presynaptic neuron - Correct Answer Conducts signal toward a synapse
Postsynaptic neuron - Correct Answer Conducts signal away from a synapse
Axodendritic synapse - Correct Answer Between an axon terminal of one neuron and dendrites
of another (most common)
Axosomatic synpase - Correct Answer Between axons and neuronal cell bodies
Axoaxonic synapse - Correct Answer Between axons of 2 neurons (uncommon)
Synaptic vesicles - Correct Answer Membrane bound sacs containing neurotransmitters that
reside on presynaptic side of axon terminals
Synaptic cleft - Correct Answer Separates the plasma membrane of two neurons
Neuroglia - Correct Answer The supporting cells of the CNS- do not conduct electrical signals
Astrocytes - Correct Answer Most abundant glial cell type;
-control the environment around neurons
-recapture and recycle neurotransmitters
-produce molecules for neural growth
-could be involved with memory and Alzheimer's
Microglial - Correct Answer Smallest and least abundant
-part of the CNS's defense system
, -phagocytes that engulf invading microorganisms and dead neurons
Ependymal cells - Correct Answer Help produce the cerebrospinal fluid and line the brain
ventricles
Oligodendrocytes - Correct Answer Wrap their cell processes around axons in CNS and produce
myelin sheaths for CNS
Satellite cells - Correct Answer Supporting cell of the PNS that surround sensory neuron cell
bodies
Schwann cells - Correct Answer Surround axons in the PNS and form myelin sheaths
Myelin sheaths - Correct Answer Composed of lipoprotein myelin that forms an insulating layer
which increases speed of action potentials
In PNS: develop during fetal period and wrap around the axon
In CNS: one myelin sheaths wraps around several axons
Gray Matter - Correct Answer Cell bodies, dendrites and axon terminals. They form gray nuclei,
ganglia, columns, and cortex
Functions of Nervous System - Correct Answer 1. sensory receptors monitor changes inside and
outside body
2. processes and interprets sensory input
3. dictates a response by activating effector organs
Central Nervous System (CNS) - Correct Answer Brain and spinal cord which serves as an
integration and command center
correct answers 100% 2026
Neurons - Correct Answer -conduct electrical impulses along the plasma membrane (action
potentials)
-can live and function for a lifetime
-do not divide
-high metabolic rate requiring lots of oxygen and glucose
Nissl bodies - Correct Answer Densely packed, flattened sacs of rough ER and free ribsosomes
that renew membranes and make proteins found in cell body of a neuron
Dendrites - Correct Answer Transmit electrical signals toward the cell body and function as
receptive sites
Axons - Correct Answer They produce and conduct action potentials and transmit impulses
away from the cell body
Axon hillock - Correct Answer initial segment of axon that generates action potentials
Multipolar neurons - Correct Answer 2 processes-Usually many dendrites and one axon; 99% of
all neurons
Bipolar neurons - Correct Answer 2 processes extending from opposite ends of cell body
Unipolar neurons - Correct Answer 1 process that emerges from cell body and divides like letter
T
Synapses - Correct Answer Elaborate cell junctions that signals pass across in one direction
,Presynaptic neuron - Correct Answer Conducts signal toward a synapse
Postsynaptic neuron - Correct Answer Conducts signal away from a synapse
Axodendritic synapse - Correct Answer Between an axon terminal of one neuron and dendrites
of another (most common)
Axosomatic synpase - Correct Answer Between axons and neuronal cell bodies
Axoaxonic synapse - Correct Answer Between axons of 2 neurons (uncommon)
Synaptic vesicles - Correct Answer Membrane bound sacs containing neurotransmitters that
reside on presynaptic side of axon terminals
Synaptic cleft - Correct Answer Separates the plasma membrane of two neurons
Neuroglia - Correct Answer The supporting cells of the CNS- do not conduct electrical signals
Astrocytes - Correct Answer Most abundant glial cell type;
-control the environment around neurons
-recapture and recycle neurotransmitters
-produce molecules for neural growth
-could be involved with memory and Alzheimer's
Microglial - Correct Answer Smallest and least abundant
-part of the CNS's defense system
, -phagocytes that engulf invading microorganisms and dead neurons
Ependymal cells - Correct Answer Help produce the cerebrospinal fluid and line the brain
ventricles
Oligodendrocytes - Correct Answer Wrap their cell processes around axons in CNS and produce
myelin sheaths for CNS
Satellite cells - Correct Answer Supporting cell of the PNS that surround sensory neuron cell
bodies
Schwann cells - Correct Answer Surround axons in the PNS and form myelin sheaths
Myelin sheaths - Correct Answer Composed of lipoprotein myelin that forms an insulating layer
which increases speed of action potentials
In PNS: develop during fetal period and wrap around the axon
In CNS: one myelin sheaths wraps around several axons
Gray Matter - Correct Answer Cell bodies, dendrites and axon terminals. They form gray nuclei,
ganglia, columns, and cortex
Functions of Nervous System - Correct Answer 1. sensory receptors monitor changes inside and
outside body
2. processes and interprets sensory input
3. dictates a response by activating effector organs
Central Nervous System (CNS) - Correct Answer Brain and spinal cord which serves as an
integration and command center
