Self Study NC's for weeks 1-2 Flashcards Preview

Structure and Function Test 1 > Self Study NC's for weeks 1-2 > Flashcards

Flashcards in Self Study NC's for weeks 1-2 Deck (22):
1

Carries preganglionic sympathetic axons

White rami

2

Carries postganglionic sympathetic axons that are distributed to somatic structures

Gray rami

3

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

White rami communicans

4

The spinal nerve arising from the conus medularis

Coccygeal nerve

5

Thin filament at the end of the conus medularis

Filum terminale

6

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

5

7

What is phase 0 of a plateau potential?

Rapid depolarization due to voltage-gated Na+ channel

8

What is phase 1 of a plateau potential?

Transient repolarization due to opening of K+ channel

9

What is phase 2 of a plateau potential?

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

10

What is phase 3 of a plateau potential?

Another K+ channel opens and we see repolarization

11

What is phase 4 of a plateau potential?

Refraction

12

ACh receptor antagonists

α-toxins

13

Botulinus and tetanus block

ACh release

14

Blocks neuronal and cardiac voltage-gated Na+ channels

Tetrodotoxin

15

Blocks motor neuron voltage-gated K+ channels

Dendrotoxin

16

Making the RMP more negative has what effect?

Inhibits AP generation

17

Making the RMP more positive has what effect?

Stimulates AP generation

18

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

Ionotropic transmission

19

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

Metabotropic transmission

20

The SA node exhibits

Metabotropic transmission

21

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

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

22

The neurotransmitter in the parasympathetic nervous system that slows heart rate

ACh

Decks in Structure and Function Test 1 Class (61):