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Advanced Biology > Nerve System > Flashcards

Nerve System Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Cell Body

A

Main part of the neuron

-Contains Nucleus and Organelles

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2
Q

Dendrite

A

The branch that receives information and carries nerve impulses to the cell body

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3
Q

Axon

A

Carries a nerve impulse away from the cell body into the next neuron, muscle, or gland

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4
Q

Sensory Neurons

A

Carry sensory information to the CNS

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5
Q

Motor Neurons

A

Carry information from CNS to muscles or glands

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6
Q

Interneurons

A

Connect Sensory neurons to motor neurons

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7
Q

Nerve

A

A bundle of axons, dendrites

-both in the PNS

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8
Q

Ganglion

A

A collection of cell bodies outside the CNS

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9
Q

Tract

A

A bundle of axons or dendrites in CNS

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10
Q

Ascending Tract

A

Go up the spinal cord

-Sensory

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11
Q

Descending Tract

A

Go down the spinal cord

-Motor

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12
Q

Nucleus

A

Collection of cell bodies inside the CNS

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13
Q

Action Potential

A

-Nerve Impulse

-

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14
Q

Neurology

A

The study of the nervous system

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15
Q

Sympathetic Division

A

Fight or Flight

-Response under stress

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16
Q

Parasympathetic Division

A

Rest and Digest

17
Q

Action Potential

A
  • Nerve Impulse

- Requires membrane potential

18
Q

Oligodendrocytes

A

Form Myelin sheaths in CNS

19
Q

Schwann Cells

A

Form Myelin Sheaths in PNS

20
Q

All or None Principle

A

If the threshold is met, the same size of changes occurs.

21
Q

Depolarization

A

Membrane potential rises and becomes positive

-(N+ rushes in)

22
Q

Repolarization

A

Potential restores to resting value by making membrane potential more negative
-(K+ rushes out)

23
Q

Hyperpolarization

A

When repolarization overshoots

24
Q

Refractory Period

A
  • After Action Potential

- Short period before action potential can be triggered

Advanced Biology (14 decks)

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