Ch9 ANS 2 Flashcards

1
Q

Preganglionic fibers that ascend from the upper thoracic cord supply

A

cervical paravertebral ganglia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

cervical ganglia consist of

A
  • superior ganglia
  • middle ganglia
  • cervicothoracic ganglia
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How is the cervicothoracic ganglion formed?

A

fusion of the inferior cervical and first thoracic ganglion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

postganglionic fibers of the superior and stellate ganglia innervate

A
  • arteries of the face
  • dilate pupil
  • elevate upper eyelid
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

postganglionic fibers from lower lumbar and parasacral paravertebral ganglia innervate

A

blood vessels in the lower limb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Where do preganglionic fibers travel?

A

splanchnic nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Sympathetic signals to the gastrointestinal tract do this

A
  • stop peristalsis
  • reduce glandular secretions
  • constrict sphincters of the digestive system
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

primary function of the sympathetic nervous system

A

maintain optimal blood supply in the organs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Moderate activity of the sympathetic system stimulates:

A
  • smooth muscle in blood vessel walls

- maintaining some contraction of vessel walls

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What happens in the ANS with increasing sympathetic activity?

A

vasoconstriction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What happens with decreasing sympathetic activity?

A

vasodilation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What happens when someone feels threatened?

A
  • sympathetic prepares for vigorous muscle activity (fight or flight)
  • vasoconstriction in skin and gut increases blood flow to active muscles
  • BP/HR increase
  • blood glucose increases
  • bronchi and coronary vessels dilate
  • activity of digestive system reduced
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are two things that cause body temp regulation?

A
  • effects on metabolism

- effectors in skin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where is epinephrine released?

A

adrenal medulla

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does epinephrine do (temperature)?

A

increases metabolic rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

sympathetic signals in body temp control

A

control

  • diameter of blood vessels
  • secretion of sweat glands
  • erection of hairs on skin
17
Q

regulation of blood flow: capacitance vessels

A

skeletal muscle veins and venules

18
Q

regulation of blood flow: What can happen if blood pooling in LE and abdomen isn’t prevented?

A

drop in BP

  • deprives brain of blood supply
  • causes syncope
19
Q

arterial walls of skeletal muscle contain

A

α-adrenergic receptors

20
Q

What acts on α-adrenergic receptors to cause vasoconstriction?

A

norepinephrine

21
Q

In addition to norepinephrine, what else can affect arteriole diameter?

A

local blood chemistry

22
Q

sympathetic control in the head: blood flow, sweating, erection of hair cells

compared to rest of the body

A

identical to sympathetic actions in remainder of the body

23
Q

sympathetic control in the head: control of the eye

A

sympathetic signals dilate the pupil and assist in elevating upper eyelid