Study Guide: Nervous System Cells

[blank_start]central nervous system[blank_end]: consists of the brain and spinal cord [blank_start]peripheral nervous system[blank_end]: composed of nerves arising from the brain and spinal cord [blank_start]afferent division[blank_end]: PNS subdivision that transmits incoming information from the sensory organs to the CNS [blank_start]sympathetic division[blank_end]: produces the "fight or flight" response [blank_start]somatic nervous system[blank_end]: subdivision that carries information from the CNS to skeletal muscle [blank_start]autonomic nervous system[blank_end]: subdivision of efferent division that transmits information to smooth muscle, cardiac muscle and glands [blank_start]efferent nervous system[blank_end]: consists of all outgoing motor pathways [blank_start]parasympathetic division[blank_end]: coordinates the body's normal resting activities

astrocyte: [blank_start]helps form the blood-brain barrier[blank_end], [blank_start]largest/most numerous neuroglial cells[blank_end], [blank_start]"star cell"[blank_end] microglia: [blank_start]ability of phagocytosis[blank_end] oligodendrocyte: [blank_start]produces myelin sheath in the CNS[blank_end], [blank_start]associated with MS[blank_end] Schwann cell: [blank_start]produces myelin sheath in the PNS[blank_end], [blank_start]neuroglia that forms the neurilemma[blank_end]

Which of the following is/are classified as nerve fibers?

Which of the following conduct impulses toward the cell body?

A neuron with one axon and several dendrites is a

Which type of neuron lies entirely within the CNS?

Which sequence best represents the course of an impulse over a reflex arc?

A complete nerve, consisting of numerous fascicles and their blood supply, is held together by a fibrous coat called the

Small, distinct regions of gray matter within the CNS are usually called

Nerves that contain mostly efferent fibers are called

Gray matter in the CNS consists of

Most nerves in the human nervous system are

Evidence now indicates that neurons may be replaced

Regeneration of nerve fibers will occur if the cell body is intact and the fibers have a neurilemma.

There are no differences between the CNS and PNS concerning the repair of damaged fibers.

The somatic motor division carries information to the [blank_start]skeletal[blank_end] muscles.

Incoming sensory pathways are [blank_start]afferent[blank_end].

The [blank_start]parasympathetic[blank_end] division coordinates the body's normal resting activities and is sometimes referred to as the "rest and repair" division.

The myelin sheath is produced by [blank_start]oligodendrocytes[blank_end] in the CNS.

The [blank_start]Schwann cells[blank_end] are found only in peripheral neurons.

Myelin sheath gaps are often called [blank_start]nodes of Ranvier[blank_end].

Energy for the neuron is provided by [blank_start]mitochondria[blank_end].

Myelinated fibers are [blank_start]white[blank_end].

[blank_start]Interneurons[blank_end] lie entirely within the central nervous system.

All electrical signals that start in receptors [blank_start]do not[blank_end] invariable travel over a complete reflex arc and terminate in effectors.

Neurons: [blank_start]axon,[blank_end] [blank_start]sensory[blank_end], [blank_start]conduct impulses[blank_end], [blank_start]efferent[blank_end], [blank_start]multipola[blank_end]r Neuroglia: [blank_start]supporting cells[blank_end], [blank_start]astrocytes[blank_end], [blank_start]forms myelin sheath[blank_end], [blank_start]phagocytosis[blank_end], [blank_start]multiple sclerosis[blank_end]