Neurology

Question 1

Glia cells in neurons

Answer 1

Schwann cells in PNS, Oligodendrocytes in CNS

Question 2

Resting potential

Answer 2

Potential that can be measured at a neuron without excitation (-70mv)

Question 3

Depolarization

Answer 3

Membrane potential becomes more positive

Question 4

Hyperpolarization

Answer 4

Membrane potential becomes more negative

Question 5

Refractory period

Answer 5

Period in which the voltage-gated ion channels cannot react to a new stimulus after being stimulated previously

Question 6

Neuromuscluar junction

Answer 6

Connection between an axon terminal and muscle cell

Question 7

Motoneuron

Answer 7

Nerve cells connected to muscle cell

Question 8

Graded potential

Answer 8

Membrane potential that change in signal strength, as opposed to the all or non property of APs. The signal amplitude is reduced over distance away from the stimuli

Question 9

Temporal summation

Answer 9

A high frequency of APs in the presynaptic neuron elicit PSPs that overlap and summate

Question 10

Stimuli strength

Answer 10

Axon is frequency-modulated; dendrites are amplitude-modulated

Question 11

Spatial summation

Answer 11

All graded potentials at the axon hillock, which arrive at the same time from multiple neurons sum up