Pressure Flashcards
Result of parasympathetic impulses along vagus nerve
Decreased heart rate
What occurs when extracellular fluid increases
Increased blood pressure
How does suction move fluid
Uses negative pressure where atmospheric pressure pushes the fluid in the direction of the negative pressure
Compare blood pressure in arms to legs, why is this
Blood pressure in legs is increased by hydrostatic pressure due to the ‘head of blood’ contacted in the vessels
What is colloid osmotic pressure
Osmotic pressure due to plasma proteins
Formula for MAP
cardiac output x peripheral resistance
What is peripheral resistance
Resistance of the arteries to blood pressure
Does stroke volume effect peripheral resistance
No
What does the cardiovascular centre of the brain contain
The cardiac centre and vasomotor centre
Three hormones that regulate blood pressure
Angiotension II, ADH and ANP
What does a diastolic reading of 80mm Hg mean
is 80mm Hg greater than atmospheric pressure
If an artery doubles its radius what happens to blood volume flow rate
Will be sixteen times the original value
Does turbulent flow exist when blood is flowing in smooth streamlines
No
What is turbulent flow
Flow where the fluid undergoes irregular fluctuations