Page 230 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

D. Circulatory reflexes
Carotid and aortic Atrial (Bainbridge) reflex
sinus reflex (depressant) (excitatory)

Regulation of the Circulation III

IX X X
4b 4a 3a 3b 3c 4c
Efferent Afferent Afferent Efferent
S P
2b
2a S P
Plate 8.16

SA node
AV node 2d
S V
2c

Vasodilatation Stretch
receptors
1. Venous return rises
Arterial blood pressure rises Stimulus Atrial pressure rises
Pressosensors in:
a) Aorta 2. d) Atrial and venous
b) Carotid artery Sensors stretch sensors
c) Left ventricle
a) Glossopharyngeal nerve (IXth nerve) 3. c) Vagus nerve (Xth nerve)
b) Vagus nerve (Xth nerve) Afferent path
a) Stimulation of
parasympathetic system 4. c) Stimulation of
b) Inhibition of Efferent path sympathetic system
sympathetic system
Bradycardia
Vasodilatation 5. Tachycardia,
Response myocardial contractility
Cardiac output Peripheral resistance increases
decreases decreases

Arterial blood pressure decreases 6. Cardiac output rises 217
Goal achieved
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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