week 2 neuroanatomy and neural transmission

Question 1

CNS:
clusters of cell bodies are called _____ and bundles of axons are called _______

Answer 1

CNS:
nuclei; tracts

Question 2

PNS:
clusters of cell bodies are called _____ and bundle of axons are called _______

Answer 2

PNS:
ganglia; nerves

Question 3

how do neurons communicate

Answer 3

• neurons communicate through electochemical signals
• signals are generatd by changing the resting membrane potential of a neuron
• signals are sent through the neuron and across the synapse to the next neuron

Question 4

depolarisation vs hyperpolarisation

Answer 4

depolarisation = increased liklihood of firing
hyperpolarisation = decreased likihood of firing

Question 5

action potentials are

Answer 5

all or none.
threshold around -65mV to generate AP

Question 6

absolute vs relative refractory period

Answer 6

Absolute = short period of time during which no other AP can be elicited
refractory = follows the absolute refractory period during which an AP can be elicited

APs travel in only one direction

Question 7

APs travel from the

Answer 7

cell body to the terminal buttons