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HHBio > CNS > Flashcards

CNS Flashcards

1
Q

Sensory input

A

Gathering information to monitor changes occurring inside and outside the body

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2
Q

Integration

A

To process and interpret sensory input and decide if action is needed

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3
Q

Motor output

A

A response to integrated stimuli
-Activates muscles or glands

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4
Q

CNS

A

-Brain & Spinal Cord

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5
Q

PNS (Peripheral nervous system)

A

Nerves outside the brain and spinal cord
-Spinal nerves & Cranial nerves
Subdivisions = sensory & motor

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6
Q

Sensory (Afferent) division

A

-Nerve fibers that carry information to the CNS

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7
Q

Motor (Efferent) division

A

-Nerve fibers that carry impulses away from the CNS (Physical response)
Subdivisions = semantic & autonomic

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8
Q

Somatic (Afferent)

A

Your 5 Senses (voluntary)
-Skeletal muscular

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9
Q

Automatic

A

Heartbeat, blood pressure, respiration, perspiration, digestion (Involuntary)
-Smooth & cardiac muscle
-Glands
Subdivisions = sympathetic & parasympathetic

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10
Q

Sympathetic

A

“Fight or Flight”
-Releases adrenaline and noradrenaline (emotion)
-Increases heart rate, blood flow to skeletal muscles
-Inhibits digestive functions (slows down)

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11
Q

Parasympathetic

A

“Rest & digest”
-Calms body to conserve energy
-Lowers heartbeat, breathing rate, blood pressure

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12
Q

Somatic (Efferent)

A

Skeletal muscular (voluntary)

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13
Q

Myelin

A

Increases speed message

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14
Q
A

Multineuron
-Most common in humans and are a major type in the CNS
-Motor neuron
-Were integration happens (interneuron/association)

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15
Q
A

Bipolarneuron
-have two processes an axon and a dendrite that extend from opposite sides of the cell body.
-These rare neurons are found in some of the special sense & eye

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16
Q
A

Unipolarneuron
-One process extends from the cell body and
forms central and peripheral processes, which
together comprise an axon.
-In the rest of the body

17
Q

Schwann cells

A

Forming myelin (PNS)

18
Q

Satellite cells

A

Protects soma (cell body)

19
Q
A

Microglia = small, phagocytes-dispose debris

20
Q
A

Ependymal = like cilia, circulates CSF (Cerebrospinal fluid) lines the CNS cavities

21
Q
A

Oligodendrocytes = produces myelin (CNS)
Grabs the capillaries)

22
Q
A

Astrocytes = star like
-Supports/brace
-Controls brains environment
-Form barrier between capillaries and neurons

23
Q
A
24
Q

Reflex arc

A
  1. Sensory neuron = unipolar (Afferent pathway)
  2. CNS (spinal cord) Interneuron = multipolar neuron
  3. Motor neuron = multipolar neuron (Efferent pathway)
25
Q

The function of neuralgia

A

To support, insulate, and protect neurons

HHBio (24 decks)

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