A&P2 Chapter 11
Collateral Branches
Branches that may occur along an axon are called
Multipolar.
The most abundant class of neuron in the central nervous system is
Oligodendrocytes
The myelin sheath that covers many CNS axons is formed by
Ganglia
Neuron cell bodies in the PNS are clustered together in masses called
The astrocytes isolate the CNS by forming a blood-brain barrier.
Many medications introduced into the bloodstream cannot directly affect the neurons of the CNS because
Why CNS neurons cannot regenerate
Most CNS neurons lack centrioles. This observation explains
Unipolar
Sensory neurons of the PNS are
Autonomic
The ________ nervous system provides involuntary regulation of smooth muscle, cardiac muscle, and glandular activity.
Neuron
The basic functional unit of the nervous system is the
Exteroceptors
________ provide information about the external environment.
Neuroglia
________ account for roughly half of the volume of the nervous system.
Interoceptors
________ monitor the digestive, respiratory, cardiovascular, urinary, and reproductive systems.
Interoceptors
________ monitor the internal environment.
Proprioceptors
________ monitor the position of skeletal muscles and joints.
Multipolar
________ neurons are the most common class in the CNS.