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BIO 203 > Module 6: Nervous Systems > Flashcards

Module 6: Nervous Systems Flashcards

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Biology 101 flashcards
1
Q

Peripheral Nervous System (PNS)

A

Contains sensory and motor division

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2
Q

Central Nervous System (CNS)

A

acts as the integrating center. monitors and controls all parts of the body

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3
Q

Sensory (Afferent) Division

A

sends information to the CNS through afferent (sensory) neurons

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4
Q

Efferent (Motor) Division

A

takes information from CNS to target cells via efferent neurons

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5
Q

Neuron

A

individual cell

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6
Q

Nerve

A

bundles of neuron axons (mostly) in the PNS
-sensory nerves, motor nerves, mixed nerves
-ex: sciatic nerve

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7
Q

Tract

A

bundles of neuron axons entirely in the CNS
-ex: corticospinal tract

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8
Q

Ganglion/Ganglia

A

clusters of neuron cell bodies in the PNS
-exception: basal ganglia (in CNS)

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9
Q

Nucleus/Nuclei

A

clusters of neuron cell bodies in the CNS

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10
Q

What are the regions of the CNS?

A

White and Grey matter

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11
Q

White Matter

A

myelinated axons
- axon bundles connecting CNS regions are tracts

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12
Q

Grey Matter

A

Unmyelinated nerve cell bodies
- Clusters of cell bodies in the CNS are nuclei
-dendrites and axon terminals

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13
Q

Schwann Cells (PNS) and Olidgodendrocytes (CNS)

A

wrap around axon and form insulating myelin sheaths
-Nodes of Ranvier are gaps in insulation

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14
Q

Satellite Cells (PNS)

A

non-myelinated Schwan cells

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15
Q

Astrocytes (CNS)

A

several subtypes, multiple roles

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16
Q

Microglia (CNS)

A

specialized immune cells

17
Q

Ependymal Cells (CNS)

A

one source of neural stem cells

18
Q

Ependymal Cells create

A

barriers between compartments

19
Q

Astrocytes take up

A

K+, water, neurotransmitters

20
Q

Microglia (modified immune cells) act as

A

scavengers

21
Q

Dorsal Root Neurons

A

carry sensory information

22
Q

Dorsal Root Ganglia

A

contain afferent (sensory) cell bodies

23
Q

Ventral Roots

A

carry motor information from the CNS to muscles and glands

24
Q

Segments are associated with

A

spinal nerves

25
Q

Medulla Oblongata

A

Controls involuntary functions
Ex: bp, breathing, swallowing, vomitimg

26
Q

Medulla oblongata relays information from

A

spinal cord to cerebrum and vice versa

27
Q

Medulla oblongata relays information from

A

spinal cord to cerebrum and vice versa

BIO 203 (3 decks)

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