Blood Pressure Regulation, Autoregulation

Question 0

Type of regulation
Accomplished by altering blood volume
Loss of blood through hemorrhage
Conservation of fluid via renal mechanism (vasoconstrictors released)

E.g. Angiotensin I converted to Angiotensin II (potent vasoconstrictor)
Aldosterone: Promotes increased reabsorption of sodium, drawing water, refilling intravascular space, conserving volume, increasing pressure

Answer 0

Long-term regulation

Question 1

Type of regulation
Happens in the minute-minute regulation
Sympathetic and parasympathetic stimulation

Answer 1

Short-term regulation

Question 2

Which bodily changes would increase perfusion in the capillary bed?

Answer 2

Low oxygen
High CO2
Low pH
Low nutrients
Fever
Decrease blood pressure (precapillary sphincter will not shunt, increasing perfusion to the bed)

Question 3

Lactic acid signals

—–> PAIN

Answer 3

Bradykinins

Question 4

Structures which collect fluid in the extravascular space and brings the fluid back in the intravascular space

Answer 4

Lymphatics

Question 5

What is the hydrostatic pressure (push pressure) in the interstitial space?
Unit is mm Hg

Answer 5

1 mm Hg because of lymphatics

Question 6

Pull pressure is also known as

Answer 6

Osmotic pressure

Question 7

What happens if the fluid does not get reabsorbed?

Answer 7

There will be edema
Decreased perfusion in capillary bed -> Increased fluid pressure
Microcirculatory bed dysfunction