Card Set Information
Poiseuille's Law explains the effect of three factors on peripheral resistance.
the smaller the radius of a vessel, the _____the resistance to blood flow
the smaller the radius of a vessel, the HIGHER the resistance to blood flow
Blood is moved through the vascular system by_________
C)pressure gradients created by the heart
increases arterial blood pressure
can be caused by signals from the sympathetic nervous system??
The maximum pressure developed in a systemic artery
Friction between the blood and vessel walls CAUSES
causes peripheral resistance
What adds pressure to the blood in the arteries following ventricular
systole and helps to maintain arterial blood pressure during ventricular
CAUSES increase peripheral resistance?
increased blood viscosity
The major factors determining blood pressure are
cardiac output and peripheral resistance
This material typically cannot move through the capillary wall.
Which of these pressures forces molecules out of capillaries?
blood hydrostatic pressure
What pressure pulls water into capillaries?
B)blood colloid osmotic pressure
The colloid osmotic pressure of the blood is caused by
the presence of proteins in the plasma
Filtration is greater at the _________end of a capillary that at the venule end.
WHAT would increase the movement of fluid out of the capillaries
Increase in blood pressure
Blood flow to a tissue increases if the
B)level of carbon dioxide in the tissue increases
WHAT factor would increase blood flow to a tissue?
would decrease mean arterial blood pressure?
dilation of the arterioles
If the blood pressure is elevated, the cardiovascular centers would compensate by
If blood pressure is too low, the cardiovascular control center in the medulla oblongata attempts to compensate by causing
INCREASED contractility of the myocardial cells
Information about blood pressure is collected and sent to the brain by
short term pressure is the driving force for all blood flow through all organs except___?
What is the most important dertermiant of resistance?
as viscosity increases ...... resisitance???
increase or decrease