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CTC Bio 1107 > Chapter 9: Nervous System (part 1) > Flashcards

Chapter 9: Nervous System (part 1) Flashcards

1
Q

Neurons

A

Nerve cell that sends impulses (cannot undergo mitosis)

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2
Q

Neuroglial Cells (neurglia)

A

Provide support, insulate, and protect neurons ( can undergo mitosis)

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3
Q

Central Nervous System (CNS)

A

Brain and spinal cord

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4
Q

Peripheral Nervous System (PNS)

A

Nerves ( connect CNS with the body)

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5
Q

Subdivisions of the PNS

A 
Sensory 
Motor 
Somatic 
Automatic 
Sympathetic 
Parasympthetic Nervous System
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6
Q

Afferent (Sensory) System

A

Sends information form receptors to the CNS

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7
Q

Efferent (Motor) System

A

Sends information from the CNS to muscles and glands

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8
Q

Somatic Nervous System

A

Sends information from the CNS to the Skeletal System to move the body

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9
Q

Automatic Nervous System

A

Sends information from the CNS to smooth muscles, cardiac muscle, and glands

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10
Q

Sympathetic Nervous System

A

Sends signals to all parts of the body including

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11
Q

Parasymathetic Nervous System

A

Sends signals mainly to the viscera of the cardiac muscle, and the glands

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12
Q

Afferent

A

To the organ

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13
Q

Efferent

A

Away from the organ

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14
Q

Soma

A

Cell body

Central structure containing cytoplasm and organelles

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15
Q

Dendrites

A 
Received stimuli (messages) from  other neuron's axon 
Carry messages to the cell body
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16
Q

Axon

A 
Send stimuli (messages) to other neuron's dendrites 
Carry messages away form the cell body
17
Q

Amount of axons and dendrites per cell

A

Dendrites- May have one or many per cell

Axons - only one per cell

18
Q

Myelin

A

Fatty substance that insulates axons

19
Q 
Schwann cells (PNS)
Oligodendrocyte (CNS)
A

Support Cells

Cells that cover axons

20
Q

Myelin sheath

A

Myelin + Schwann/ Oligodendrocyte cells

Speed up impulse travel

21
Q

Nodes of Ravier

A

Gaps in the myelin sheath

22
Q

White matter

A

Myelinated axons (faster travel of impulses)

23
Q

Gray matter

A

Unmyelinated axons (slower travel of impulse

24
Q

Sensory Neurons

A

(Afferent Neurons)

Send messages from body to brain located in our sense organ

25
Q

Sensory Neuron polarity

A

Bipolar

one dendrite and one axon

26
Q

Motor Neuron

A

(Efferent Neurons)
Send messages from brain to body, most travel from the brain and spinal cord to the organs, muscles, and glands of our body

27
Q

Motor Neuron polarity

A

Multipolar

Having many dendrites and one axon

28
Q

Association Neuron

A

(Interneurons)

Function in connecting other neurons

29
Q

Association Neuron polarity

A

Multipolar (mostly)

CTC Bio 1107 (49 decks)

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