Autonomic Nervous System Flashcards Preview

[OS 202] Lecture Exam A > Autonomic Nervous System > Flashcards

Flashcards in Autonomic Nervous System Deck (27):
1

3 Divisions of the ANS

1. Sympathetic
2. Parasympathetic
3. Enteric (Not discussed)

2

Functions of the ANS

1. Maintain homeostatic conditions
2. Coordinate body's response to stress, injury, exercise
3. Assists endocrine system to regulate reproduction

3

Where are postganglionic neurons found?

In the Autonomic Ganglion

4

Differentiate Somatic Motor Systems from Autonomic Motor Systems

Somatic: Direct motor transmission to the skeletal muscle

Autonomic: Preganglionic fibers transmit to Autonomic Ganglions then pass information to the postganglionic fibers to end effector organs

5

What channels do acetylcholine open?

Sodium Channels

6

Sympathetic and Parasympathetic both use what neurotransmitter?

Acetylcholine

7

Receptors for Sympathetic Division?

Adrenergic

8

In Parasympathetic Division what secretes acetylcholine?

Post-ganglionic Fibers

9

Alternate name of Sympathetic Division?
Parasympathetic Division?

Thoracolumbar Division
Craniosacral Division

10

Sympathetic Pre-Ganglionic Secrete?
Post-Ganglionic Secrete?

Pre: Acetylcholine
Post: Norepinephrine

11

All post-ganglionic of the Sympathetic Division secrete Norepinephrine except?

Blood Vessels
Sweat Glands

12

[T/F] Acetylcholine is the only neurotransmitter found in the pre-ganglionic fibers

F

There are other neurotransmitters which may modulate effects

13

What provides the fast EPSP's?

Nicotinic Receptors

14

Which Division is more generalized?

Which one is more specific? Why?

Sympathetic Division is more generalized

The parasympathetic ganglions are closer to the end organs making the effects more local and precise

15

Acetylcholine is degraded by?

Acetylcholinesterase

16

Adrenal Medulla can target a lot more because it uses this pathway to spread Acetylcholine and Norepinephrine?

Blood Stream

17

Chromaffin Cells are what kind of ganglionic fibers?

Post-ganglionic

18

Adrenaline is from what AA?

Tyrosine

19

Origin of Adrenaline Pathway

Tyrosine -> Dopamine -> Noradrenaline -> Adrenaline

20

Locus Coeruleus neurons produce?

Noradrenaline

21

Organs Effected by Locus Coeruleus (A4, A6, Subcoeruleus)

Brainstem Nuclei (Sensory)
Hippocampus
Cerebral Cortex

22

Major Neuronal Sources of Noradrenaline (2)

Ventral Tegmental Nuclei
Locus Coeruleus Nuclei

23

Most Important Source of Adrenaline

Adrenal Medulla

C1, C2, C3 Neurons
(Unlike Noradrenaline which are A1-A6)

24

Can a single neuron contain both Adrenergic and Noradrenergic transmitters?

Yes

25

What neurons are all cholinergic?

Preganglionic

26

In a normal individual what is the BP response when one changes position from recumbent to standing? Normal heart rate response?

Assumption of an upright posture causes blood to shift downwards,
creating a decrease in stroke volume. The circulatory adjustment to orthostatic stress is rapid in healthy subjects. Mechanisms like cardiopulmonary reflexes, venoarteriolar reflexes, and vasopressin (AVP) and renin-angiotensin systems contribute to maintenance of postural normotension (Wieling & Van Lieshout, 1993).

27

Galvanic Skin-Resistance Test

Excessive Sweating