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)
Loading flashcards...
1
Q

Carries preganglionic sympathetic axons

A

White rami

2
Q

Carries postganglionic sympathetic axons that are distributed to somatic structures

A

Gray rami

3
Q

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

A

White rami communicans

4
Q

The spinal nerve arising from the conus medularis

A

Coccygeal nerve

5
Q

Thin filament at the end of the conus medularis

A

Filum terminale

6
Q

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

A

5

7
Q

What is phase 0 of a plateau potential?

A

Rapid depolarization due to voltage-gated Na+ channel

8
Q

What is phase 1 of a plateau potential?

A

Transient repolarization due to opening of K+ channel

9
Q

What is phase 2 of a plateau potential?

A

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

10
Q

What is phase 3 of a plateau potential?

A

Another K+ channel opens and we see repolarization

11
Q

What is phase 4 of a plateau potential?

A

Refraction

12
Q

ACh receptor antagonists

A

α-toxins

13
Q

Botulinus and tetanus block

A

ACh release

14
Q

Blocks neuronal and cardiac voltage-gated Na+ channels

A

Tetrodotoxin

15
Q

Blocks motor neuron voltage-gated K+ channels

A

Dendrotoxin

16
Q

Making the RMP more negative has what effect?

A

Inhibits AP generation

17
Q

Making the RMP more positive has what effect?

A

Stimulates AP generation

18
Q

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

A

Ionotropic transmission

19
Q

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

A

Metabotropic transmission

20
Q

The SA node exhibits

A

Metabotropic transmission

21
Q

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

A

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

22
Q

The neurotransmitter in the parasympathetic nervous system that slows heart rate

A

ACh

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