The Nervous System (Pt. 1) Flashcards

1
Q

The master controlling and communicating system of the body

A

Nervous system

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2
Q

Every __ , __ , and __ reflects the activity of the nervous system (3)

A
  • thought
  • action
  • emotion
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3
Q

The signaling device, or means of communication with the body cells is?

A

Electrical impulses

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4
Q

Electric impulses are __ , __ , and cause almost __ __ (3)

A
  • rapid
  • specific
  • immediate responses
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5
Q

The brain and spinal cord are part of the?

A

Central nervous system

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6
Q

The nervous system includes the? (2)

A
  • brain
  • spinal cord
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7
Q

The brain and spinal cord occupy what body cavity?

A

Dorsal body cavity

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8
Q

The brain and spinal cord act as the __ and __ centers of the nervous system (2)

A
  • integrating
  • commanding
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9
Q

The central nervous system (brain and spinal cord) interprets what?

A

Sensory information

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10
Q

The central nervous system issues instructions based on past __ __ and current __ __ (2)

A
  • Past experiences
  • Current conditions
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11
Q

Supporting cells are lumped together as __ or simply glia

A

Neuroglia

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12
Q

__ __ are lumped together as neuroglia, or simply glia

A

Supporting cells

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13
Q

Neuroglia, or glia means?

A

nerve glue

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14
Q

Supporting cells will support, insulate, and protect delicate __

A

neurons

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15
Q

__ __ will support, insulate, and protect delicate neurons

A

Supporting cells

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16
Q

Although neuroglia resembles neurons structually, they are not able to transmit __ __

A

Nerve impulses

17
Q

Nerve impulses are a function that is highly __ in neurons

A

developed

18
Q

Rough ER are __ substances?

A

Nissel substances

19
Q

Found inside the cell body

A

Neurofibrils

20
Q

What is the main function of neurofibrils? To maintain what?

A

Maintain cell shape

21
Q

The armlike processes or fibers of neurofibrils vary in length, from __ to __ - __ feet (3)

A
  • microscopic
  • 3-4 feet
22
Q

The longest ones in humans reach from the lumbar region of the spine to the big toes

A

Neurofibrils

23
Q

The longest neurofibrils reach from the __ region to the __ __ (3)

A
  • lumbar region
  • big toes
24
Q

The neuron that process and conveys incoming messages (electical signals) towards the body

A

Dendrites

25
Q

Dendrites process and convey __ messages __ the body (2)

A
  • incoming
  • towards
26
Q

Electircal signals are:

A

incoming messages

27
Q

Neuron processes that generate nerve impulses and conduct them away from the cell body

A

Axons

28
Q

Axons are neuron processes that generate nerve impulses and conduct them __ from the cell body

A

away

29
Q

All axon branch at their terminal end, forming hundreds to thousands of __ __ (2)

A

Axon terminals

30
Q

Axon terminals contain hundreds of tiny __ , or membranous __ (2)

A
  • tiny vesicles
  • membranous sacs
31
Q

The tiny vesticles/membranous sacs contain chemicals called?

A

Neurotransmitters

32
Q

Each axonal terminal is separated from the next neuron by a tiny gap called the?

A

Synaptic cleft

33
Q

Syn means?

A

Clasp or joint

34
Q

The functional junction of the synaptic cleft, is called the?

A

Synapse

35
Q

Myeliate axons outside the CNS, they are specialized supporting cells

A

Schwann cells

36
Q

Schwann cells __ themselves tightly around the __ (2)

A
  • Wrap
  • Axon
37
Q

The tight coil wrapped membrane of the schwann cell is called the?

A

Myelin sheath