1. hydrostatic pressure)
Return to
circulation
3.6 L/day flows
into lymphatic
vessels
Arteriole
KEY
Venule
CHP (Capillary
hydrostatic pressure)
Filtration
Reabsorption
BOP (Blood
osmotic pressure)
No net fluid
movement
24 L/day
20.4 L/day 35 mm Hg 25 mm Hg 25 mm Hg 25 mm Hg 18 mm Hg 25 mm Hg
NFP (Net filtration
pressure)
NFP = +10 mm Hg
NFP = 0
NFP = 7 mm Hg

2. Filtration at the Arterial end
Net filtration pressure:
CHP-BCOP=35-25=10
Reabsorption at the Venous end
Net filtration pressure:
CHP-BCOP=15-25=-10

3. HOMEOSTASIS DISTURBED HOMEOSTASIS RESTORED
Figure Baroreceptor Reflexes of the Carotid and Aortic Sinuses (Part 1 of 2).
Cardio-inhibitory
center
Cardio-acceleratory
center
cardiac
output
Responses to Increased
Baroreceptor Stimulation
Vasomotor center
Baroreceptors
Vaso…
occurs
HOMEOSTASIS DISTURBED
HOMEOSTASIS RESTORED
Increasing blood
pressure
Blood pressure
decreases
Start
HOMEOSTASIS
Normal range
of blood
pressure

4. HOMEOSTASIS Normal range of blood pressure Start Baroreceptors
Figure Baroreceptor Reflexes of the Carotid and Aortic Sinuses (Part 2 of 2).
HOMEOSTASIS
Normal range
of blood
pressure
Start
HOMEOSTASIS DISTURBED
HOMEOSTASIS RESTORED
Decreasing blood
pressure
Blood pressure
Vaso….
occurs
Baroreceptors
Vasomotor center
Cardiac
output
Responses to Decreased
Baroreceptor Stimulation
Cardio-acceleratory
Cardio-inhibitory
center

5. Impulse traveling along
afferent nerves from
baroreceptors:
cardio-inhibitory center
cardio-acceleratory center
Baroreceptors
in carotid
sinuses and
aortic arch
stimulated
vasomotor center
Arterial
blood pressure
rises above
normal range
Stimulus:
Rising blood
pressure
Homeostasis: Blood pressure in normal range

6. Homeostasis: Blood pressure in normal range
Stimulus:
Declining
blood pressure
Impulses from
baroreceptors:
cardio-acceleratory center
cardio-inhibitory center
Arterial blood pressure
falls below normal range
Baroreceptors in
carotid sinuses
and aortic arch
Vasomotor
Fibers
vasomotor
center