Chapter 13 Review

Neurons that convey information to the CNS, are called sensory, or ______, neurons.

Afferent

Prenatal degeneration of the of the forebrain results in a birth defect called ________.

Anencephaly

The glial cells that guide migrating neurons in the developing fetal brain are

Astrocytes

A/An ______ synapse is formed when a presynaptic neuron synapses with the cell body of a postsynaptic neuron.

Axosomatic

The soma of a mature neuron lacks

Centrioles

Neurons receive incoming signals by way of specialized processes called ______.

Dendrites

Neurons arise from embryonic

Ectoderm

In the peripheral nervous system, the somas of the neurons are concentrated in enlarged, knot like structures called ______ connected to the nerves.

Ganglia

The integrative functions of the nervous system are performed mainly by

Interneurons

The glial cells that destroy microorganism in the CNS are

Microglia

Another name for the axon of a neuron is

Nerve fiber

The _____ and ______ are necessary for regeneration of damaged nerve fibers in the peripheral nervous system.

Neurilemma, endoneurium

In the central nervous system, cells called _____ perform one of the same functions that Schwann cells do in the peripheral nervous system.

Oligodendrocytes

A friend takes a flash photograph of you, and you continue to see an image of the flash unit for several seconds afterward. This phenomenon is the result of a __________ circuit.

Parallel after-discharge

All of the nervous system except the brain and spinal cord is called the ______.

Peripheral nervous system

At a given synapse, the ______ neuron has neurotransmitter receptors.

Postsynaptic

Motor effects that depend on the repetitive output from a neural pool are most likely to use the ______ type of neural circuit.

Reverberating

Which of the following appears earlier than all the rest in prenatal development of the nervous system?

The neural plate

Neurotransmitters are found in

The synaptic knob

Nerves that directly control the mobility of the stomach or rate of the heartbeat would belong to

The visceral motor division