the nervous system Flashcards

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1
Q

the central nervous system consist of

A

brain and spinal cord

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2
Q

CNS stands for

A

central nervous system

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3
Q

PNS lol stands for

A

peripheral nervous system

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4
Q

the PNS consists of nerves that relay info about the environment to the

A

brain, and relay info from brain to body

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5
Q

the PNS has three groups of

A

nerves

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6
Q

PNS: 1 there’s a group of nerves that control the

A

voluntary muscles

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7
Q

PNS: 2 there are nerves that carry info from the

A

sensory organs

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8
Q

PNS: 3 there’s a group of nerves that regulate involuntary functions such as

A

breathing, heartbeat, digestion

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9
Q

the skull protects

A

the brain (a main component of CNS)

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10
Q

what cushions the brain and spinal cord from injury

A

cerebrospinal

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11
Q

what is the myelin sheath

A

form of insulation on an electrical wire, preventing electrical impulses from passing to the wrong neuron

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12
Q

what is the myelin sheath made of

A

myelin, a fatty material

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13
Q

sensory receptors are special tissues or cells that receive input from the environment and

A

send signals to the CNS

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14
Q

what else do sensory receptors detect

A

pressure, temp, pain,

balance, position, motion

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15
Q

what are reflexes

A

actions requiring no involvement from the brain

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16
Q

example of a reflex

A

moving your hand from something hot

17
Q

multiple sclerosis is caused by an error by the immune system and causes

A

muscle weakness
slurred speech
difficulty walking