Unit 1 Flashcards
Name five special senses.
Taste, olfaction, vision, hearing, and balance
Name four subdivisions of the peripheral nervous system.
Cranial nerves, spinal nerves, ANS, ENS
The nervous system is divided functionally into the ____ and the ____ or ____ and ____.
SNS & ANS or efferent & afferent
Name the structural and functional unit of the nervous system.
Neurons
Which is a correct description of neuroglia?
A. They are less than the neurons in number.
B. They are excitable cells.
C. They support the neurons.
D. They are supported by the neurons.
C. They support the neurons.
In the PNS, neuroglia include: A. Ependymal cells B. Neurolemma cells C. Astrocytes D. Oligodendroglia
B. Neurolemma cells
Schwann cell is also called: A. Satellite cell B. Neuroglia cell C. Neurolemma cell D. Ependymal cell
C. Neurolemma cell
Th cranial ventricles are lined by A. Oligodendroglia cells B. Ependymal cells C. Astrocytes D. Satellite cells
B. Ependymal cells
A collection of nerve cells in the CNS is known as: A. Nucleus B. Plexus C. Ganglion D. Tract
A. Nucleus
The white matter in the CNS includes: A. Cranial nucleus B. Dorsal horn of the spinal cord C. Cranial tract D. Ventral horn of the spinal cord
C. Cranial tract
The meninges include _____, _____, and _____.
Pia mater
Arachnoid mater
Dura mater
Name the layer that provides an effective barrier of nerve fibers.
Perineurium
The endoneurium surrounds the axon and the ______ cell.
Neurolemma
Name the two types of ganglia in function.
Autonomic (visceral motor)
Sensory
Name the structure which carries impulses away from the nerve cell body.
Axon
In the PNS, the sensory nerve fibers are also known as ______.
Afferent fibers
How many cranial nerves arise from the brain?
11
What is the descriptive name of the cranial nerve which arises from the upper cervical spinal cord?
Spinal accessory nerve (CN XI)
Spinal nerves arise from the spinal cord as: A. Anterior and posterior roots B. Anterior and posterior rootlets C. Mixed spinal nerves D. Ventral and dorsal rami
B. Anterior and posterior rootlets
The unilateral area of skin innervated by the fibers of a single spinal nerve is called a _____.
Dermatome
Which of the following is a correct description of proprioceptive sensation?
A. Proprioceptive sensations are usually conscious.
B. Proprioceptive sensation is related to visual input
C. Proprioceptive sensation concerning distension of the stomach
D. Proprioceptive sensation concerns the spatial orientation of the body and limbs.
D. Proprioceptive sensation concerns the spatial orientation of the body and limbs.
Visceral motor fibers transmit impulses to _____, _____, and _____.
Smooth muscle
Cardiac muscle
Glandular tissue
Branchial motor fibers innervate A. Masseter B. Sternohyoid C. Thyrohyoid D. Levator scapula
A. Masseter
Name three functionally different modalities of the nerve fibers which innervate the skeletal muscles.
Somatic efferent
Branchial efferent
Parasympathetic visceral efferent
Name four functional modalities of the nerve fibers which are carried by the facial nerve.
Branchial efferent
Visceral/parasympathetic efferent
General afferent
Special sensory
In general how many neurons are involved in a consecutive somatic motor pathway?
Two
The lower motor neurons are embedded in the _____ forming the nuclei of origin.
Anterior gray column of the spinal cord
The lower motor neuronal bodies are located in the _____ and _____ of the spinal cord as the nuclei of origin.
Brain stem and upper cervical
Which of the following symptoms is related with lower motor lesions? A. Spastic paralysis B. Hyper tonicity C. Clonus D. Atrophy
D. Atrophy
In general where are the secondary sensory cranial nuclei of termination?
Dorsal gray matter of the brainstem
The secondary sensory neurons decussate and project to the _____.
Thalamus
Tertiary sensory neurons are in the ________.
Ventral thalamic nucleus
What part of the internal capsule carries the tertiary sensory neuronal axons to the postcentral gyrus?
Posterior limb
Branchial efferent cranial nerves arise from:
Which nuclei?
Trigeminal Nucleus, Facial Nucleus, Nucleus Ambiguus, Accessory Nucleus
What neuronal type is for the primary sensory neurons?
Pseudounipolar
Name the patent opening for the four visceral efferent cranial nerves.
Superior orbital fissure of the lesser wing of the sphenoid, internal acoustic meatus of the temporal bone, jugular foramen of the occipital and temporal bones
Neurons communicate with each other at the A. Axon B. Dendrite C. Cell body D. Synapse
D. Synapse
Name the cranial nerves, which carry the visceral efferent fibers.
Oculomotor (CN III), Facial (CN VII), Glossopharyngeal (CN IX), and Vagus (CN X)
Name the cranial nerve, which carry the branchial efferent fibers.
Mandibular division of trigeminal (CN V3), Facial (CN VII), Glossopharyngeal (CN IX), Vagus (CN X) and Accessory (CN XI)
The nervous communication occurs by means of chemical reagents called _________.
Neurotransmitters
Name the cranial nerves, which have tractus solitarius as the nucleus of termination.
Facial (CN VII) and Glossopharyngeal (CN IX)
Name the patent openings for the facial nerve.
Internal acoustic meatus of the temporal bone
Name the patent openings for the Glossopharyngeal nerve.
Jugular foramen of the occipital and temporal bones
Name the nucleus for the vagal motor nerves.
Nucleus Ambiguus
Name the nucleus for taste sensation from the posterior 1/3 of the tongue.
Tractus (nucleus) solitarius - Glossopharyngeal nerve
Name two secondary olfactory neurons.
Mitral cells and tufted cells
All of the following are descriptions of the primary olfactory neurons EXCEPT:
A. The primary olfactory neurons are located on the superior nasal concha.
B. The primary olfactory neurons are multipolar neurons.
C. Numerous cilia attached to the olfactory vesicle of the primary olfactory neuron.
D. Axons of the primary olfactory neuron gathered into 20 fila olfactoria.
B. The primary olfactory neurons are multipolar neurons.
Name the neurons that are continually replaced throughout life.
Olfactory receptor neurons
The synapses between the primary and secondary olfactory neurons form ______ layer in the olfactory bulb.
Glomerular
Name the laminar structure of the olfactory bulb from the surface inward.
Olfactory nerve layer Glomerular layer External plexiform layer Mitral cell layer Internal plexiform layer Granule cell layer Olfactory nerve tract
Name the layer of the olfactory bulb where the incoming olfactory axons synapse with dendrites of the secondary olfactory neuron.
Glomerular layer
Name the layer of the olfactory bulb that becomes the anterior olfactory nucleus in the olfactory tract.
Granule cell layer
Name the two main intrinsic neurons of the olfactory bulb.
Periglomerular cells and granule cells
The olfactory trigone splits centrally into the _______ and the ______.
Medial olfactory striae and lateral olfactory striae
Name the neuron that has no axon in the olfactory bulb.
Granule cells
The medial stria of the olfactory nerve ends to the subcallosal area, which consists of _____ and _____.
Paraolfactory area and paraterminal area
The subcallosal area is connected with ________ gyrus by way of the Cingular gyrus.
Para-hippocampal
All of the following are connected by the lateral stria of the olfactory nerves EXCEPT: A. Gyrus semilunaris B. Amygdaloid body C. Entorhinal area D. Subcallosal area
D. Subcallosal area
The olfactory nerve fibers are extremely minute and unmyelinated. True/false
True
Damage to any part of the olfactory system may result in _____ or ________.
Anosmia or hyposmia
Damage to the olfactory system may cause total loss of smell, which is known as ________.
Anosmia
All the neuronal elements of the eye are derived from _______ of the _______.
Optic vesicle of the prosencephalon
The optic nerves are composed of axons of _______ of the ______ layer.
Multipolar neurons of the granular layer
The layer of the optic nerve in the retina is formed by the axons of ______ neurons.
Multipolar ganglionic