ACE modules Flashcards
1
Q
MAP or SBP is a product of?
A
SVR x CO
2
Q
Cardiac output is a product of ?
A
CO = HR x SVR
3
Q
Factors affecting SVR?
A
- Vascular tone
- Blood viscosity
4
Q
Mechanisms of BP regulation?
A
- Fast neural response
- Slow humoral response
5
Q
Sensory information about BP is detected by ?
A
- Stretch receptors - Baroreceptors
6
Q
Location of baroreceptors?
A
- carotid sinus
- aortic arch
7
Q
Pathways of baroreceptor sensing of BP information?
A
- Baroreceptors
- Afferent automonic fibres to medulla
8
Q
The vasomotor center?
A
Area in the medulla involved in regulation of BP
9
Q
Determinants of BP?
A
- Arteriolar diameter
10
Q
Vasomotor centre mechanism?
A
- Activation of SNS
- Innervation of arterioles
- Smooth muscle contraction
- Vasoconstriction
11
Q
Activators of vasomotor centre resulting in increased BP?
A
- Pain
- Emotion
12
Q
Inhibitors of VMC resulting in lowering of BP?
A
- Increased firing of baroreceptors
13
Q
Components of hormonal control of BP?
A
- Adrenaline / Noradrenaline (Adrenal medulla)
- Vasopressin (Hypothalamus)
- Angiotensin II (Renin-Angiotensin-Aldosterone system)
14
Q
Actions of hormonal control of blood pressure? Compensatory mechanisms?
A
- Positive inotropy
- Vasoconstriction
- Fluid retention
15
Q
Natural substances lowering BP? Potent arteriolar vasodilators?
A
- Histamine
- Nitric oxide
16
Q
Sympathetic nerve endings ?
A
- Release Noradrenaline acting on alpha-1-receptors to cause vasoconstriction
17
Q
Location of alpha-1-adrenoceptors?
A
- Skin
- Gut
- Kidney
