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155 Cards in this Set
- Front
- Back
Autonomic Nervous System (ANS)
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subdivision of peripheral nervous system
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Peripheral Nervous System (PNS)
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nerves that extend to the outlying parts of the body; branches off
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Central Nervous System (CNS)
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Brain & Spinal cord
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Dendrite
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branching projection of neurons
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schwann cell
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forms myelin outside the CNS
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another name for motor neuron
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efferent
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Nodes of Ranvier
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indentions between adjacent schwann cells
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Facicles
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groups of wrapped axons
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epineurium
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covers whole nerve
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a group of nerve-cell bodies located in the PNS ?
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inter-neurons
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simplest kind of reflex arc
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2 neuron arc
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3 neuron arcs contain what types of neurons ?
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1. sensory neurons
2. inter-neurons 3. motor neurons |
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impulse in reflex arc starts in ?
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Receptors
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what is a synapse?
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space that separates the axon of 1 neuron from the dendrites of another neuron.
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what is a reflex?
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response to impulse conduction over reflex arcs
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what is a withdraw reflex ?
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Contraction of a muscle ; causes pull away
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what is ganglion ?
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group of nerve-cell bodies in the PNS
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true or false: All inter-neurons lie entirely within the gray matter of the CNS
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True
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what impulse causes knee-jerk?
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patellar reflex
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endorphins & enkephalins are neurotransmitter that conduct ____ impulses
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pain
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neurotransmitters are chemicals that allow nuerons to ____
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communicate w/ each other
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Acetycholine is an example of __
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neurotransmitter
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A Synaptic knob is a tiny bulge at the end of
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post-synaptic neurons axons
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true or false:
Nerve impulses continually race along every nerve cell's surface. |
false ; do not
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what is the Medulla ?
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part of brainstem that joins the spinal cord to the brain
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what is NOT a function of the brainstem ?
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centers for speech & memory.
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ADH is produced by ?
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Hypothalamus
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4 Functions of the Hypothalamus
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1. controls heart rate
2. constrictions of blood vessels 3.contraction of stomach 4.produces hormone |
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What is the Thalamus ?
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arousal or alerting mechanism
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4 functions of cerebrum ?
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1. memory
2. awareness of sensations 3. consciousness 4.movement |
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simplest kind of reflex arc
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2 neuron arc
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3 neuron arcs contain what types of neurons ?
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1. sensory neurons
2. inter-neurons 3. motor neurons |
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impulse in reflex arc starts in ?
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Receptors
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what is a synapse?
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space that separates the axon of 1 neuron from the dendrites of another neuron.
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what is a reflex?
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response to impulse conduction over reflex arcs
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what is a withdraw reflex ?
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Contraction of a muscle ; causes pull away
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what is ganglion ?
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group of nerve-cell bodies in the PNS
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true or false: All inter-neurons lie entirely within the gray matter of the CNS
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True
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what impulse causes knee-jerk?
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patellar reflex
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endorphins & enkephalins are neurotransmitter that conduct ____ impulses
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pain
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which lobe is responsible for perception of sound
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temporal lobe
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visual perception is located in the ?
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occipital
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largest section of brain
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Cerebrum
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Parkinson's disease is a disease of
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Cerebral nuclei
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cerebrovascular accident is also known as
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stroke
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What is Basal Ganglia ?
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gray matter in cerebrum
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NOT a function of cerebellum
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Associates sensations w/ emotions
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3 functions of cerebellum
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1. equilibrium
2. movements 3. maintain posture. |
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what are Spinal Tracts?
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bundles of myelinated nerve fibers; make columns of spinal cord.
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loss of sensation by spinal cord injury
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anesthesia
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Olfactory
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sense of smell
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optic
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sight/vision
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2 systems regulate body function
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1. nervous system
2. endocrine system |
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dopamine, serotonin belong to group of compounds called ?
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catecholamines
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plays role is arousal & alerting mechanism & produce sensations
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Thalamus
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connects impulses from the sensory neuron to motor neuron
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inter-neurons
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2 subdivisions of PNS
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1. ANS (autonomic nervous system)
2. Somatic Nervous System |
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function of ANS
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regulates involuntary vital function. ex/ heart, breathing . etc)
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function of Somatic Nervous System?
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controls voluntary actions of skeletal muscles
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efferent neurons are also known as
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motor neurons
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afferent neurons are also known as
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Sensory neurons
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group of peripheral axons is
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nerves
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Parkinson disease is a deficiency of what neurotransmitter
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dopamine
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3 parts of brain stem
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1.medulla oblongata
2. pons 3.midbrain |
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3 layers of Menegines ?
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1. Pia Matter
2.Dura Matter 3. Arachnoid Matter |
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considered a seizure disorder
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epilepsy
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stabbing pain in trigeminal nerve in head called Trigeminal Neurologia is also known as ?
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Tic Doulourex
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carries impulses toward cell body
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dendrites
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vital center of brain
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Medulla Oblongata
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knee- jerk is a type of
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reflex arc
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simplest nervous system pathway
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2-Neuron pathway
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carries nerves impulses away from the body
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axons
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reactivation of varicella virus (chicken pox)
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Shingles
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stroke & cerebral palsy is causes by lack of ?
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oxygen to the brain
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2 NERVES part of pns
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1. Cranial nerves
2. Spinal nerves |
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Mylein disorder
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M.S (multiple Sclerosis)
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2 neurotransmitter act morphanie0like help w/pain
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1. endorphins
2. enkephalius |
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cerebrospinal fluid fills spaces in brain cell cerebral
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Ventricles
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inherited disorder ; purposeless movement progressing to dementia
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Huntington Disease
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what is meningitis?
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inflammation if the meninges
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common type of tumor
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glioma
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2 types of cells found in nervous system
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1. glia
2. nerves |
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what is Pons?
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part of brainstem; pathway between brain & body.
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function of spinal cord
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carries messages to & from brain & rest of body
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Medulla Oblongata centers
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cardiac, respiratory & vasomotor center
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Gustatory Cells
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sense of taste
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function of General Sense organ ?
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detects pain or touch
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4 special senses
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All located on Face:
1. Taste 2. Smell 3. Eye 4. Ears |
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function of Special Senses
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Detect environmental stimuli & transduce energy into electrical impulses.
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white part of eye is commonly known as
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Sclera
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Colored part of eye
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iris
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"window" of eye
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cornea
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mucous covers front of eye
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conjunctiva
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contracts & dilates pupil allowing more or less light to enter
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iris
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lens is held in place by
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ciliary muscle
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condition; eye can no longer focus on near objects
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Presbyopia
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FLUID in front of eye. constantly formed & drained
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Aqueous Humor
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if aqueous humor drainage is blocked , it causes pressure & cases what condition >
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Glaucoma
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Rods & cones located in
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Retina
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Blind spot also called
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Optic Disc
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night blindness
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NYctalopia
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Pink eye
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Conjunctivitis
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cloudy spots on lens
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cataracts
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Hyperopia
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Farsightedness
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loss of center visual field
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Scotoma
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irregularity in cornea
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astigmatism
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2 parts of external ear
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1. Pinna ((Auricle))
2. External Acoustic Canal |
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Tympanic Membrane also called
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eardrum
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bones of middle ear called
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Ossicles
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stapes presses against
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oval window
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middle ear infection called
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Otitis media
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"Ringing in Ear"
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Tinnitus
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Hearing loss with age
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Presbycusis
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chronic inner ear disease; nerve deafness & vertigo
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Meniere Disease
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Structures found on tongue
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papillae
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nerve impulses of taste buds travel through 2 ___ nerves
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Cranial
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Type of Receptor ; sense of smell
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Chemo-receptors
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to be detected in olfactory receptors, chemicals must be dissolved in
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mucus; that lines nasal cavity.
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photoreceptors for night vision
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rods
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photoreceptors for day vision
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cones
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cones see what 3 colors
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1.Red
2. Green 3. Blue |
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where are Ossicles
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middle ear
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what is Christae Ampullares & where is it
man Christina won the Mechanical Race.She Circles Champions |
mechanical receptor; semi-circle canal. (helps w/ balance)
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2 chemoreceptors & function
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1. Gustatory-taste
2 Olfactory - smell |
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2 Propioceptors
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1. golgi tendon
2 muscle spindles |
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where is pinna
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external ear
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common name for sclera
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white of eye
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if eyeball is too short from front to back it causes what condition ?
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Hyperopia (Farsightedness)
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leading cause of blindness in elderly ?
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Macula Degeneration
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3 Refraction Disorders
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1.Hyperopia
2.Cataract 3.Myopia |
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main function of sense receptors?
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-Detect
-Convert -Perceive |
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receptor; sense of balance & hearing
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mechanoreceptors
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3 functions of inner ear
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- hearing
- balance - equilibrium |
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Auditory tube also called
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Ustatium tube
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where is auditory tube
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between middle ear & throat
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known as "window of eye"
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cornea
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greatest # of touch receptors on body
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fingertips
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3 layers of Eye :
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1.Sclera
2. Retina 3. Choroid |
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what is sclera
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outer layer;no light comes though
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What is retina
(contains?) |
Contains rods & cones
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what is choroid
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middle layer; contains blood vessels & nerves; Scatters light.
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2 structures make part of choroid
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Iris & scerly muscles
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where is " Organ of Corti" & what does it do
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Cochlea ; generate nerve impulses for hearing .
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elongated eyeball causes what condition ?
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Myopia (nearsightedness)
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what is a 2 point Discrimination?
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distinguish 1 touch stimulations from 2
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Fovea
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cones; on retina
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what are Proprioceptors ?
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special receptors; near tendents & muscles
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what is Perilymph
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watery fluid
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what is Endolymph?
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Thick liquid in Inner Ear (vestibule, semi circular canals & cochlea
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where is cochlea ?
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inner ear
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3 bones of ossicles:
(SIM) |
1. Malleus
2. Incus 3. Stapes |
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3 bones of ossicles:
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1. Malleus
2. Incus 3. Stapes |
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Pinna is also called
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auricle
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3parts of middle ear
middle child; Venny, Seriously, Control & Calm |
vestibule, semicircular canals, and cochlea
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divisions of the autonomic nervous system (ANS)
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sympathetic nervous system and parasympathetic nervous system
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