Quiz 6.1 Org of Nervous System

Which glial cell type is most likely to be activated in response to injury?

Microglia

Which of the following is not a glial cell? Macrophage Astrocyte Ependymal cell Schwann cell None of the above; all are glial cells

Macrophage

Which of the following statements correctly describes the afferent division of the peripheral nervous system? The afferent division of the PNS transports action potentials to the CNS. The afferent division of the PNS stimulates hormone secretion by glands. The afferent division of the PNS is responsible for stimulating muscle contractions. The afferent division of the PNS lacks sensory receptors.

The afferent division of the PNS transports action potentials to the CNS.

The peripheral nervous system is divided into ________. sensory and motor divisions sensory and somatic nervous divisions motor and enteric nervous divisions motor and somatic nervous divisions

sensory and motor divisions

The autonomic nervous system is divided into

sympathetic and parasympathetic divisions

The part of a neuron that conducts impulses away from the cell body is called _________.

an axon

Neurons _________. are classified by function only are classified by structure only are classified by function or structure are classified by neither function nor structure

are classified by function or structure

This cell participates in forming the blood-brain barrier.

astrocyte

Which of the following nerve tissue cells controls most of what enters and exits central nervous system neurons?

astrocytes

In the case of a loss of oxygen, which of the following sources will provide the energy necessary to allow the brain to continue functioning for 5-10 minutes?

Glycogen stored in the astrocytes

Which of the following statements correctly describes microglia? Microglia help to circulate cerebrospinal fluid within the CNS. Microglia are phagocytic cells residing within the CNS. Microglia generate myelin sheaths in the PNS. Microglia generate myelin sheaths in the CNS.

Microglia are phagocytic cells residing within the CNS.

Which of the following cells act as phagocytes within the central nervous system?

Microglial cells

Which nerve will conduct an action potential the fastest? Unmyelinated; large-diameter nerve Unmyelinated; small-diameter nerve Myelinated; small-diameter nerve Myelinated; large-diameter nerve

Myelinated; large-diameter nerve

Multiple sclerosis is a neurological disease which destroys myelin sheaths of the central nervous system. Which of the following cell types is damaged as a result of multiple sclerosis?

Oligodendrocyte

Which of the following cell types is responsible for the formation of myelin within the spinal cord?

Oligodendrocytes

Which glial cell is not found in the CNS? Microglia Astrocyte Ependymal cell Schwann cell None of the above; all are glial cells found in the CNS

Schwann cell

Which of the following statements correctly describes the efferent division of the PNS? The efferent division of the PNS transmits impulses from the CNS to skeletal muscle. The efferent division of the PNS conducts only IPSPs. The efferent division of the PNS is responsible for detecting stimuli.

The efferent division of the PNS transmits impulses from the CNS to skeletal muscle.

Which statement is not true concerning the nervous system? Neurons make up over 50% of the weight of the brain The function of the neuron is to transmit electrical signals There are 5 divisions of the whole nervous system The glial cells support and protect the neurons

There are 5 divisions of the whole nervous system

Multipolar neurons _________. are neurons with 2 or more interneurons have many axons with a single soma have many dendrites with a single axon have a single process from the cell body that divides into 2 branches, still functioning as a single axon

have a single process from the cell body that divides into 2 branches, still functioning as a single axon

Myelin ________.

is a lipid-based material that may be produced in the PNS or CNS