The nervous system

_________ reflexes involve skeletal muscles

Somatic

The part of the peripheral nervous system that brings information to the central nervous system is the

afferent division

The layer of lipid around an axon is called ________

myelin

soma

neuron cell body

The region of the brain that is involved in conscious thought and intellectual function as well as processing somatic sensory and motor information is the

cerebrum

dopamine

neurotransmitter

The gaps between adjacent Schwann cells along the length of an axon called

nodes

The projections of gray matter toward the outer surface of the spinal cord are called

horns

All of the nervous tissue outside of the central nervous system comprises the ________ nervous system

peripheral

neuroglia

provide (s) a supporting framework

exteroceptor

provide (s) information about the external environment

The most rapid action potentials are conducted on

thick, myelinated axons

Most neurons in the brain are

multipolar

Which of the following is a function of the motor division of the nervous system?

sending signals to muscles

Information received by the brain concerning internal or external environmental condition is called a (n)

sensation

The specialized membranes that protect the spinal cord are termed

spinal meninges

Neurotransmitters are released from the

synaptic terminals/knobs

Aggregations of ribosomes in neurons are referred to as

Nissl bodies

The neurilemma of axons in the peripheral nervous system is formed by

Schwann cells

The dural sinuses are located in the

dura mater

The glial cells responsible for maintaining the blood-brain barrier are the

astrocytes

Neurons that have one axon and one dendrite with the soma between them are called

bipolar

Synaptic knobs occur at the ends of

dendrites

The cerebrum is separated from the cerebellum by the

transverse fissure

The ________ division of the nervous system brings sensory information to the central nervous system

afferent

The all-or-none principle states that

all stimuli great enough to bring the membrane to threshold will produce identical action potentials

The brain and spinal cord comprise the

central nervous system

Which of the following is a function of neurons?

information processing

In general, the nervous system

is fast acting

astrocytes

largest and most numerous type of glial cells

The myelin sheaths that surround the axons of some of the neurons in the CNS are formed by

oligodendrocytes