Neurology

Question 1

Ganglia

Answer 1

Collections of nerve cell bodies outside the CNS

Question 2

Nuclei

Answer 2

Collection of nerve cell bodies with a similar function in the CNS

Question 3

Synapses

Answer 3

Chemical = NT = 1-way
Electrical = gap junctions = 2-way

Question 4

Chemical synapses depend on which electrolyte

Answer 4

Calcium: voltage-gated Ca channels

Question 5

NT receptor types

Answer 5

Ionotropic receptors - directly gate ion channels.
Metabotropic receptors - 2nd messenger system: ion channels, cAMP activation, IC enzyme activation, gene transcription activation

Question 6

In an electrical synapse what ions are moved to create the membrane potential

Answer 6

Na, K, Cl

Question 7

What is the rmp of electrical synapses?

Answer 7

Spinal motor neuron: -65mV
Peripheral n fibers: -90mV

Question 8

What results in an excitatory pre-synaptic potential (EPSP)?

Answer 8

Na influx

Question 9

What results in an inhibitory post-synaptic potential (IPSP)?

Answer 9

Cl influx. K efflux.

Question 10

Rapidly acting NT

Answer 10

Acetylcholine
Norepinephrine
Epinephrine
Gamma-aminobutyric acid (GABA)
Glycine
Glutamate
Nitric oxide