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PSYC > one > Flashcards

one Flashcards

1
Q

the central nervous system consists of

A

the brain and the spinal chord

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2
Q

the peripheral nervous system consists of

A

the nerves in which receive info from the world around us

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3
Q

the somatic nervous system

A

interacts with the external environment

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4
Q

the autonomic nervous system

A

interacts with the internal environment e.g sweating and hairs standing up

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5
Q

afferent nerves

A

input
-touches Audio etc

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6
Q

efferent nerves

A

output
-send messages to the muscles to control

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7
Q

the spinal nerves

A

there is 31 pairs that connect through the spinal chord
-from the base of the skull to the coccygeal nerve
-cervical
-thoratic
-lumbar
-saccral

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8
Q

how many cervical nerves

A

8

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9
Q

how many thoracic nerves

A

12

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10
Q

how many lumbar nerves

A

5

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11
Q

how many saccral nerves

A

5

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12
Q

how many coccygeal nerves

A

1

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13
Q

what is a sensory dermatone

A

shows where certain regions of the body correspond to certain parts of the spinal nerves
-if certain parts of the body can’t be felt can correspond to a nerve issue

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14
Q

what does the parasympathetic nervous system do from the efferent nerves of the autonomic nervous system

A

-arousal
-ready to respond

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15
Q

what does the sympathetic nervous system do from the efferent nerves of the autonomic nervous system

A

-relaxation

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16
Q

what side does input info come into the spinal nerves

A

dorsal side

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17
Q

what side does output info come into the spinal nerves

A

ventral side

18
Q

what sensory neuron comes from the dorsal side of the spine

A

unipolar sensory neuron

19
Q

what sensory neuron comes form the ventral side of the spine

A

multipolar sensory neuron

20
Q

what is the top part of the Brian stem called

A

the forebrain
-telecephalon
-dincephalon

21
Q

what is the part of the Brian stem under the forebrain

A

the midbrain
-mesencephalon

22
Q

what part of the Brainstem is under the midbrain

A

the hind brain
-metecephalon
-mylenncpehalon

23
Q

what sits under the hind Brian

A

the spinal chord

24
Q

what element are within the neuron cell body

A

K+ AND A-(protein)

25
Q

what elements are outside the neuron cell body

A

Na+ and Cl-

26
Q

what stems off from the cell body of the neuron

A

-dendrites
-axon hillock

27
Q

what does the axon hillock do

A

connect the cell body and axon

28
Q

axons

A

are of various lengths

29
Q

where is myelin and what does it do

A

myelin is a fatty acid wrapped around the axon, it speed up the information travelling

30
Q

what are synapses

A

they connect neuron to neuron and they send the chemical signals to the next neuron
-on to the cell body or dendrites

31
Q

what are EPSP

A

excitatory post-synaptic potential

32
Q

what is the function of ESP

A

-make the cell more active/excited
-Na+ flowing into the cell
-pulse is all or none, has to reach a certain threshold to bring it on however once threshold is met, anything above does not produce any larger effect

33
Q

what are action gated sodium channels

A

-respond to a change in voltage
-do the same as ESP however as they are gated, change in near by channels electric potential can effect nearby channels
-postive feedback system

34
Q

what is the three stages of the Hodgkin Huxley cycle

A

starts with a synaptic potential/receptor potential

-opening of voltage gated Na+ channels
-Na+ flow into cell
-depolaristaion of membrane

35
Q

what happens in the rising phase of an action potential

A

-soduim channels oen
-postassium channels open

36
Q

what happens between the rising phase and the depolarisation phase

A

-the sodium channels close

37
Q

what happens between the depolarisation phase and the hyper polarisation phase

A

-postassium channels close

38
Q

what is mylenation

A

-speeds up action potentials
-conduct at a velocity of 100m/s
-info travel faster on myelinated portions

39
Q

what is multiple sclerosis

A

-result of demylenation
-numbness or weakness in limbs
-loss visions, one eye usually
-electric shock w/ head movements

40
Q

what could be a theory to running speed

A

-speed of reflex information due to myelin

PSYC (20 decks)

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