Self Study NC's for weeks 1-2

Question 1

Carries preganglionic sympathetic axons

Answer 1

White rami

Question 2

Carries postganglionic sympathetic axons that are distributed to somatic structures

Answer 2

Gray rami

Question 3

Sensory neurons coming back to the spinal cord move from the paravertebral ganglia to the ventral rami via

Answer 3

White rami communicans

Question 4

The spinal nerve arising from the conus medularis

Answer 4

Coccygeal nerve

Question 5

Thin filament at the end of the conus medularis

Answer 5

Filum terminale

Question 6

How many different types of channels (isoforms) are allowing the plateau potential?

Answer 6

5

Question 7

What is phase 0 of a plateau potential?

Answer 7

Rapid depolarization due to voltage-gated Na+ channel

Question 8

What is phase 1 of a plateau potential?

Answer 8

Transient repolarization due to opening of K+ channel

Question 9

What is phase 2 of a plateau potential?

Answer 9

The plateau phase (both Ca2+ and a different K+ channels are open)

Question 10

What is phase 3 of a plateau potential?

Answer 10

Another K+ channel opens and we see repolarization

Question 11

What is phase 4 of a plateau potential?

Answer 11

Refraction

Question 12

ACh receptor antagonists

Answer 12

α-toxins

Question 13

Botulinus and tetanus block

Answer 13

ACh release

Question 14

Blocks neuronal and cardiac voltage-gated Na+ channels

Answer 14

Tetrodotoxin

Question 15

Blocks motor neuron voltage-gated K+ channels

Answer 15

Dendrotoxin

Question 16

Making the RMP more negative has what effect?

Answer 16

Inhibits AP generation

Question 17

Making the RMP more positive has what effect?

Answer 17

Stimulates AP generation

Question 18

Synaptic transmission that functions through stimulation of ligand-gated ion channels

Answer 18

Ionotropic transmission

Question 19

Synaptic transmission that functions through ligand-receptor binding to initiate intracellular signalling cascades which will then activate ion channels

Answer 19

Metabotropic transmission

Question 20

The SA node exhibits

Answer 20

Metabotropic transmission

Question 21

In the SA node, blocking ACh binding to its receptor would have what effect?

Answer 21

Prevent efflux of K+, making it harder to reach threshold

Question 22

The neurotransmitter in the parasympathetic nervous system that slows heart rate

Answer 22

ACh