Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

ANSC 2340 > nervous system > Flashcards

nervous system Flashcards

1
Q

nervous system integration function

A

information gathering, processing info, sending a response to alter/control body functions/actions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

nervous system motor functions

A

initiate and regulate movement of body parts, regulate secretions from glands, maintain appropriate state of conscoiusness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

brain and spinal cord function

A

receive, analyze, store, integrate information. brain sends a signal or response that leads to some action in the body or by the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is required from the nervous system?

A

rapid transmission of info from one site to another in the body, via electrical impulses.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

neuroglia/glial cells

A 
supports NS structurally + functionally.
forms myelin which forms a sheath around the axon
anchors neurons
destroys pathogens
removes dead pathogens.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

neurons

A

second type of cell.
are excitable, develops action potentials.
involved in info transmission through CNS
need neutron for muscle contraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

central neuron cell body

A

soma or perikaryon

- receives info from dendrites, processes it and decides what to do.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

dendrites

A

receive stimuli - part of neuron
short and multi branched. dendro = branch
transmits info to soma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

axons

A

conduct nerve pulses away from the cell
can be v long (>1m) or small.
conducts nervous impulse from soma to another neuron/cell
1 axon/neuron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

myelinated axon

A

conduct impulses faster

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

myelin sheath

A

made of glial cells that are wrapped tightly around the axon. its white

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

oligodendrites

A

myelin functions as the cell membrane for these functional glial cells inside the brain and spinal cord in CNS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Schwann cells

A

myelin outside fo the brain and spinal cord, in peripheral nervous system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

nodes of ranvier

A

gaps between adjacent glial cells, works together w myelin sheaths to speed up transfer of the nerve inpulse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

central nervous system

A

includes brain and spinal cord, deals w central/cranial-caudal axis of the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

peripheral nervous system

A

nerves that radiate from CNS to all other parts of the body, extends from central axis to periphery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

cranial nerves

A

PNS nerves that originate from the brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

spinal nerves

A

PNS nerves that originate from the spinal cord

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

afferent nerves

A

going to, carries nerves impulses towards CNS

- inc sensory nerves that carry sensations from sensory receipts in the skin and other parts of the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

efferent nerves

A

going away
carries nerve impulses away from the CNS to muscles and other organs,
aka motor nerves, cause skeletal muscle contractions

21
Q

involuntary nerve functions controlled by the ANS

A

contract intestines
increase heart rate in response to threat
stim secretion of digestive juices
self-regulating system w automatic functions
doesnt go to skeletal, goes to smooth, cardiac, endocrine glands

22
Q

somatic NS function

A

voluntary part of the PNS

conscious/voluntary control of skeletal muscles

23
Q

sodium potassium pump

A

pumps Na+ to outside, K+ inside.

specialized to help maintain resting state of the cell

24
Q

resting membrane potential

A

diff in electron charge across neurons membrane

net negative charge

25
Q

excitability of resting/unstimulated neuron

A

presence of Na/K pump which pumps Na inside to outside against gradient, polarizes cell membrane
- diff of electrical charge across membrane

26
Q

resting state nerve cell

A

neuron not being stimulated

  • na has been pumped out of cell
  • k pumped into cell
  • net negative charge
27
Q

depolarization

A

external stimuli causes the gates to open
- Na channels open, only briefly
happens bc of concentration gradient

28
Q

refractory period

A

no depolarization under any circumstances

29
Q

how does info travel down axon to send a signal

A

generation of action potential which results from adjoining neuron sending an impulse or presence of external stimuli to stem a neuron

30
Q

salatory conduction

A

its more efficient to skip parts of the neuron to speed up the process.

31
Q

what is multiple sclerosis (MS)

A

myelin sheath is damaged in nerves. loss of normal muscle control, unable to make coordinated movements.

32
Q

synaptic transmission

A

depolarization face or ap crosses entire axon - neuron must release a chemical that will cause subsequent synaptic transmission

33
Q

synapse?

A

junction between 2 neurons

nuron and target cell

34
Q

synaptic cleft

A

physical gap between neuron and celll located across the gap

35
Q

neurone that receives neurotransmitter from the synapse:

A

post synaptic neuron, doesnt have to be a neuron that receives a neuro transmitter, could be a muscle fibre, organ, or other tissue

36
Q

neurotransmitter

A

replaces

ap to stim depolarization of the embrace across synaptic cleft

37
Q

Ca2+ defficiency?

A

no Ca influx into knob membrane, no release of neurotransmitter into synaptic cleft. no stim of postsynaptic membrane across the synaptic cleft.

38
Q

excitatory neurotransmitters

A

causes Na influx through post synaptic membrane, membrane becomes depolarized a +’ve membrane potential

39
Q

inhibitory neurotransmittes

A

hyperpolarizes postsynaptic membrane, cell becomes more negative, RMP becomes more negative

40
Q

acetyl choline

A

excitatory at junction between somatic neutrons (voluntary) and muscles that stim muscle contraction.
somehow related to bradycardia

41
Q

catecholamines

A

produced by adrenal medulla. inc epinephrine and norepinephrine (fight or flight)

42
Q

autonomic nervous system

A

motor and sensory nerves which transmit impulses to smooth and cardiac muscle.
does not go to skeletal muscles
includes sensory nerves
self regulating
includes sympathetic and parasympathetic NS

43
Q

what slide did u end at?

A

85

44
Q

function of nervous system

A

regulate body function and maintains homeostasis

45
Q

rxn to stimuli

A

fast

46
Q

duration of effects

A

short

47
Q

chemical messenger

A

neurotransmitters

48
Q

messenger producing cells

A

neurons

49
Q

distance from site of production

A

short

ANSC 2340 (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions