Ch 13 Lec 1 - Nervous System Flashcards Preview

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Flashcards in Ch 13 Lec 1 - Nervous System Deck (83):
1

coordinate all body systems and this is accomplished by the transmission of signals

nervous system

2

the nervous system is a blank signaling system

electrochemical

3

communication system that is a slower scale and uses chemicals in the blood stream called blank

endocrine system, hormones

4

two communication systems of the body

nervous, endocrine

5

nervous system is made up of many blank, each composed of several tissues

organs

6

three things that make up nervous system

neurons, neuroglia, blood vessels, connective tissue

7

2 divisions of the nervous system

central, peripheral

8

the brain and spinal cord make up the blank nervous system

central

9

cranial and spinal nerves make up the blank nervous system

peripheral

10

the central nervous system is covered by blank

meninges

11

central nervous system is bathed in blank fluid

cerebrospinal

12

nervous system that is the integration center

central

13

nervous system that has both sensory and motor fibers

peripheral

14

the PNS connects the CNS to blank and blank

glands, muscles

15

this nervous system brings information to and from the CNS

PNS

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two divisions of the PNS

afferent, efferent

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the sensory division of the PNS

afferent

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the motor division of the PNS

efferent

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two divisions of the efferent division

somatic, autonomic

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conscious control division of the efferent division

somatic

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unconscious division of the efferent division

autonomic

22

order of a general function of the nervous system

receptors, sensory, integrative, motor, effector

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receptor of nervous system does what

detects stimuli

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sensory is felt by blank

afferent PNS

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integrative part of nervous system

CNS

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motor part of nervous system is the blank

efferent PNS

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the effector of the nervous system

muscle/gland

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structural and functional units of nervous system, excitable and amitotic

neurons

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nervous tissue cell that are accessory cells and act like connective tissue

neuroglial

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three major structures of neurons

soma, dendrites, axon

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cell body of a neuron

soma

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soma is blank

mononucleate

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four parts of soma

nissl bodies, axon hillock, perikaryon, neurofibrils

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part of soma with ribosome clusters and give a gray color

nissl bodies

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part of soma that connects soma to axon

axon hillock

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region around the nucleus in soma

perikaryon

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cytoskeleton that extend into dendrites/axon and gives shape in soma

neurofibrils

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part of neuron that respond to neurtransmitters

dendrites

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dendrites are short, branched, and blank

unmyelinated

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dendrites are specialized for blank with other neurons

contact

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axon is only blank

1 cell

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axon conducts nerve impulses blank soma

away from

43

axon can give off blank

collaterals

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axon are wrapped in blank

myelin sheath

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glial cells wrapped around the axon

myelin sheath

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axons end in blank

synaptic terminals

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axons produce blank

neurotrasmitters

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movement of cellular materials (not signals) through the axon

axonal transport

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axonal transport that is away from soma; and transports neurotransmitters, organelles, nutrients

anterograde

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axonal transport toward soma, degraded materials to be recycled & extracellular substances

retrograde

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cytoplasm of an axon

axoplasma

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axoplasma consists of few blank

organelles

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plasma membrane of an axon

axolemma

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axolemma has these three things

collaterals, telodendra, synaptic terminal

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side branches of axolemma

collaterals

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neuron shape that is small and axons can not be distinguished from dendrites

anaxonic

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anaxonic neurons are found mostly in the blank

CNS

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neuron shape that is several small dendrites converged onto one and the dendrite/axon are separated by soma

bipolar

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bipolar neuron cells are blank

unmyelinated

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neuron shape that is several small dendrites converged onto one large one and the dendrite/axon are continuous

unipolar

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unipolar neurons are usually blank

myelinated

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majority of unipolar neurons are sensory neurons in the blank

PNS

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shape of neuron that is many dendrites extend from soma and a long axon

multipolar

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multipolar neurons are blank

myelinated

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the majority of motor neurons in the PNS are blank

multipolar

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multipolar neurons are also in the blank of CNS

spinal interneurons

67

neurons that have sensory function

afferent

68

cell body is usually outside the CNS in blank neurons

afferent

69

afferent neurons have receptor ends on blank or are associated with receptor cells in blank organs

dendrites, sense

70

three types of receptors in afferent neurons

exteroreceptors, proprioceptors, interoceptors

71

touch, temp, pressure, light chemicals are detected by blank receptors

exteroceptors

72

receptor that monitor muscle and skeleton position

proprioceptors

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receptors that monitor internal systems

interoceptors

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neurons only in the CNS and are the most abundant neurons

interneurons

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two classifications of interneurons

excitatory, inhibitory

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interneurons blank two or more neurons

link

77

neurons that have motor function and the cell body is usually inside the CNS

efferent

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efferent neurons that control skeletal muscles

somatic

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efferent neurons that control smooth muscles and glands

autonomic

80

cells that are called satellite or schwann cells in the PNS

neuroglial cells

81

cells that are called astrocytes, oligodendrocytes, ependymal cells, microglia in the CNS

neuroglial cells

82

largest and most common neuroglial cell that is star shaped

astrocytes

83

three functions of astrocytes

structure, repair, metabolism, regulate ions, guide neurons to targets, form blood brain barrier