Ch. 10 - Nervous System
The middle layer, or "spider layer," of the meninges is called the X mater.
Arachnoid
The fatty substance that protects the axon is called:
Myelin Sheath
The transparent fibrous membrane that forms a tube around and adheres to the surface of the spinal cord and brain is called the
Pia Mater
Phagocytosis is performed by X cells.
microglia
X neurons carry messages toward the brain and spinal cord from external receptors.
Afferent
X are star-shaped cells that twine around nerve cells to form a supporting network in the brain and spinal cord.
Astrocytes
The extension of the neuron that carries the messages away from the nerve cell body is the:
Axon
Which division of the nervous system consists of the brain and spinal cord?
CNS
X are short, branched nerve fibers on the nerve cell that are the receptive areas of the neuron.
Dendrites
Nerves carry impulses by creating electric charges in a process known as:
Depolarization
The X root of the spinal cord contains only sensory nerve fibers.
Dorsal
Motor neurons are also known as X neurons.
Efferent
X neurons carry messages from the brain and spinal cord.
Efferent
The nervous system shares in the maintenance of homeostasis with the X system.
Endocrine
X cells line the cavities of the central nervous system and produce cerebrospinal fluid.
Ependymal
The gray matter in the spinal cord is found in the posterior, lateral, and anterior
Horns
The three membranes enclosing the brain and spinal cord are the:
Meninges
Small cells that protect the central nervous system by engulfing and destroying microbes and cellular debris are called X cells.
Microglia
Ganglia are clusters of nerve cell bodies found:
Outside the CNS
Schwann cells form myelin sheaths around nerve fibers in the X nervous system.
Peripheral
Which division of the nervous system consists of all the nerves of the body?
Peripheral Nervous System
An involuntary reaction to an external stimulus is known as a(n) .
Reflex
A XX is the simplest pathway able to receive a stimulus, enter the central nervous system for immediate interpretation, and produce a response.
Reflex Arc
The X nervous system conducts impulses from the brain and spinal cord to skeletal muscle, thereby causing us to respond or react to changes in our external environment.
Somatic
Carrying messages from the sensory neurons to the brain for interpretation and the response from the brain to the muscles and glands is a major function of the:
Spinal Chord
The myelin sheath X an impulse as it travels along the axon.
accelerates
Neurons that have several dendrites and one axon are known as X neurons.
multipolar
X or sensory neurons are those that convey information from receptors in the periphery of the body to the brain and spinal cord.
Afferent
A nerve cell process that carries nervous impulses away from the cell body is called a(n):
Axon
X cells produce cerebrospinal fluid.
Ependymal
How do users obtain the most dramatic "high" when using this drug?
Inhaling
A X is a bundle of nerve fibers located outside the central nervous system.
Nerve
What are the two main communication systems of the body?
Nervous and endocrine systems
The type of nervous tissue that protects and supports the nerve is called "nerve glue" or
Neuroglia
Transmission of nerve impulses across synapses is brought about by the secretion of very low concentrations of chemicals called X, which move across the gap.
Neurotransmitters