A&P Exam 4 (Nervous System) UPDATED ACTUAL Questions and
CORRECT Answers
Question: What is the Central Nervous System (CNS)?
Correct Answer: brain and spinal cord
Question: What is the Peripheral Nervous System (PNS)?
Correct Answer: nevous tissue outside the brain and spinal cord
Question: What are the two divisions of the PNS?
Correct Answer: the sensory/afferent division and the motor/efferent division
Question: What are the main functions of the nervous system?
Correct Answer: Receiving sensory input, integrating information, controlling motor output to effector
organ, maintaining homeostasis, and establishing and maintain mental activity.
Question: What is the sensory (afferent) division of the PNS?
Correct Answer: neurons that transmit action potentials from sensory receptors (dendrites) in the PNS to
the CNS
Question: What is the motor (efferent) division of the PNS?
Correct Answer: neurons that transmit action potentials from the CNS to the effectors in the PNS (skeletal
muscle/glands)
Question: What are the devisions of the motor division of the PNS?
Correct Answer: somatic nervous system and autonomic nervous system
Question: What is the somatic nervous system?
Correct Answer: the division of the peripheral nervous system that controls the body's skeletal muscles
Question: What are nerves?
Correct Answer: bundles of axons (nerve fibers) in the PNS
Question: What is a ganglia?
Correct Answer: a collection of neuronal cell bodies (soma) in the PNS
Question: What are somatic motor neurons?
Correct Answer: nerves that conduct impulses from CNS to skeletal muscle, cell body in CNS (spinal
cord), axons extend to NMJ, only one neuron from CNS to skeletal muscle
Question: What is the autonomic nervous system?
Correct Answer: the part of the nervous system responsible for control of the bodily functions that are
involuntary
Question: What are the effectors of the autonomic nervous system?
Correct Answer: smooth muscel, cardiac muscle, glands
Question: What is the autonomic ganglia?
, Correct Answer: the place where the axons of the first neuron and the cell body of the second neuron meet
Question: What are the two neurons that transmit action potententials in a relay fashion to effectors in the
autonomic nervous system?
Correct Answer: pre- and postsynaptic neurons
Question: What is the motor division of the autonomic nervous system (ANS) subdivided into?
Correct Answer: sympathetic and prasympathetic
Question: What is the sympathetic division of the ANS?
Correct Answer: a division that is activated when there is a threat or a percived threat to homeostasis,
physiological resposed that promotes fight or flight
Question: What is the parasympathetic division of the ANS?
Correct Answer: a division that is activated to maintains homeostasis, physiological response that
promotes rest and digest
Question: What is the Enteric Nervous System?
Correct Answer: a subdivision of the ANS that consists of a plexus in the walls of the digestive tract an
regulates digestive function independant of the CNS
Question: What is a plexus?
Correct Answer: a network or spiderweb of nerves
Question: What are neurons?
Correct Answer: excitable cells that respond to stimuli by changing their membrane potential and transmit
action potentials
Question: What are neuroglia (glial cells)?
Correct Answer: cells that support and protect neurons, do not transmit action potentials, and are more
numerous than neurons
Question: How many types of Neuroglia are there?
Correct Answer: 6 4 in CNS 2 in PNS
Question: What are the 4 types of neuroglia in the CNS?
Correct Answer: astrocytes, oligodendrocytes, microglia, ependymal cells
Question: What are the 2 types of neruoglia in the PNS?
Correct Answer: schwann cells and satallite cells
Question: What are astrocytes?
Correct Answer: These are abundant, star-shaped cells that create the blood-brain barrier (tight junctions
in the blood vessels in brain).
Question: What are the funcitons of astrocytes?
Correct Answer: support and anchor neurons to blood vessels, maintain ion concentration in CNS, and
absorb/recycle neuro transmitters in the synapses
Question: What are ependymal?
CORRECT Answers
Question: What is the Central Nervous System (CNS)?
Correct Answer: brain and spinal cord
Question: What is the Peripheral Nervous System (PNS)?
Correct Answer: nevous tissue outside the brain and spinal cord
Question: What are the two divisions of the PNS?
Correct Answer: the sensory/afferent division and the motor/efferent division
Question: What are the main functions of the nervous system?
Correct Answer: Receiving sensory input, integrating information, controlling motor output to effector
organ, maintaining homeostasis, and establishing and maintain mental activity.
Question: What is the sensory (afferent) division of the PNS?
Correct Answer: neurons that transmit action potentials from sensory receptors (dendrites) in the PNS to
the CNS
Question: What is the motor (efferent) division of the PNS?
Correct Answer: neurons that transmit action potentials from the CNS to the effectors in the PNS (skeletal
muscle/glands)
Question: What are the devisions of the motor division of the PNS?
Correct Answer: somatic nervous system and autonomic nervous system
Question: What is the somatic nervous system?
Correct Answer: the division of the peripheral nervous system that controls the body's skeletal muscles
Question: What are nerves?
Correct Answer: bundles of axons (nerve fibers) in the PNS
Question: What is a ganglia?
Correct Answer: a collection of neuronal cell bodies (soma) in the PNS
Question: What are somatic motor neurons?
Correct Answer: nerves that conduct impulses from CNS to skeletal muscle, cell body in CNS (spinal
cord), axons extend to NMJ, only one neuron from CNS to skeletal muscle
Question: What is the autonomic nervous system?
Correct Answer: the part of the nervous system responsible for control of the bodily functions that are
involuntary
Question: What are the effectors of the autonomic nervous system?
Correct Answer: smooth muscel, cardiac muscle, glands
Question: What is the autonomic ganglia?
, Correct Answer: the place where the axons of the first neuron and the cell body of the second neuron meet
Question: What are the two neurons that transmit action potententials in a relay fashion to effectors in the
autonomic nervous system?
Correct Answer: pre- and postsynaptic neurons
Question: What is the motor division of the autonomic nervous system (ANS) subdivided into?
Correct Answer: sympathetic and prasympathetic
Question: What is the sympathetic division of the ANS?
Correct Answer: a division that is activated when there is a threat or a percived threat to homeostasis,
physiological resposed that promotes fight or flight
Question: What is the parasympathetic division of the ANS?
Correct Answer: a division that is activated to maintains homeostasis, physiological response that
promotes rest and digest
Question: What is the Enteric Nervous System?
Correct Answer: a subdivision of the ANS that consists of a plexus in the walls of the digestive tract an
regulates digestive function independant of the CNS
Question: What is a plexus?
Correct Answer: a network or spiderweb of nerves
Question: What are neurons?
Correct Answer: excitable cells that respond to stimuli by changing their membrane potential and transmit
action potentials
Question: What are neuroglia (glial cells)?
Correct Answer: cells that support and protect neurons, do not transmit action potentials, and are more
numerous than neurons
Question: How many types of Neuroglia are there?
Correct Answer: 6 4 in CNS 2 in PNS
Question: What are the 4 types of neuroglia in the CNS?
Correct Answer: astrocytes, oligodendrocytes, microglia, ependymal cells
Question: What are the 2 types of neruoglia in the PNS?
Correct Answer: schwann cells and satallite cells
Question: What are astrocytes?
Correct Answer: These are abundant, star-shaped cells that create the blood-brain barrier (tight junctions
in the blood vessels in brain).
Question: What are the funcitons of astrocytes?
Correct Answer: support and anchor neurons to blood vessels, maintain ion concentration in CNS, and
absorb/recycle neuro transmitters in the synapses
Question: What are ependymal?
