Neurophysiology Flashcards Preview

Physiology > Neurophysiology > Flashcards

Flashcards in Neurophysiology Deck (337)
Loading flashcards...
1

Nerve type

Afferent

2

Nerve type

Efferent nerve

3

Autonomic nervous system

Visceral motor (involuntary) function

4

Somatic nervous system

Somatic motor (voluntary) function

5

Glial cells

  • Non-neuronal cells
  • Provide support + nutrition
  • Form myelin

6

What characterises a neuron?

  • Electrical excitability
  • Presence of synapses

7

Name the three parts of a typical neuron

  • Soma/body
  • Dendrites
  • Axon

8

The axon leaves the soma at the...

Axon hillock

9

Give the 5 functions of glial cells on neurons

  • Secure
  • Supply oxygen + nutrients
  • Insulate between neurons
  • Destroy pathogens
  • Remove dead neurons

10

Resting membrane potential

  • Potential gradient
  • Between IC space and EC space

11

The potential of the IC space is...

Negative

12

Steps toward depolarisation of a cell

  1. Positive IC charge
  2. Decreased PD between IC and EC

13

Give the potential difference found between the IC + EC space of a neuron

-75mV

14

  • Na+: 140
  • K+: 5
  • Ca2+: 2.5
  • Cl-: 100

15

  • Na+: 14
  • K+: 95
  • Ca2+: μmol/l
  • Cl-: 3

16

ATPase pump

  • Na+ out
  • K+ in

17

K+

18

Na+

19

RMP is a result of...

Outflow of K+ ions

20

Give the aim of the ATPase pump in the neuron cell membrane

Maintain concentration gradient

21

Which equation is used to calculate the change of permeability of a neuron

Goldman-Hodgkin-Kats (GHK) equation

22

EK

Potassium equilibrium potential

23

The lipid bilayer of a cell functions as an electrical...

Insulator

Ions pas via the channels

24

1

Channel domains

25

2

Outer vestibule

26

3

Selectivity filter

27

5

Phosphorylation site

28

Hyperpolarisation never evokes...

Action potential

29

Local response

A potential change remaining under a threshold

30

What is conduction with decrement?

  • The farther the recording electrode from the stimulation site
  • The smaller the potential change which reaches the electrode