Ch 10 Questions Flashcards
Blood flow through the capillary beds is regulated by:
The capillary sphincters.
Shock:
Refers to a state of collapse and failure of the cardiovascular system.
The autonomic nervous system regulates involuntary functions such as:
Sweating
Digestion
Constriction and dilation of capillary sphincters
Regulation of blood flow is determined by:
Cellular need
Perfusion requires having a working cardiovascular system as well as:
Adequate oxygen exchange in the lungs
Adequate nutrients in the form of glucose in the blood
Adequate waste removal
The action of hormones such as epinephrine and norepinephrine stimulates ___________ to maintain pressure in the system and, as a result, perfusion of all vital organs.
An increase in heart rate
An increase in the strength of cardiac contractions
Vasoconstriction in nonessential areas
Basic causes of shock include:
Poor pump function
Blood or fluid loss
Blood vessel dilation
Noncardiovascular causes of shock include respiratory insufficiency and:
Anaphylaxis
___________ develops when the heart muscle can no longer generate enough pressure to circulate the blood to all organs.
Cardiogenic shock
Neurogenic shock usually results from damage to the spinal cord at the:
Cervical level
In septic shock:
There is an insufficient volume of fluid in the container
The fluid that has leaked out often collects in the respiratory system
There is larger-than-normal vascular bed to contain the smaller-than-normal volume of intravascular fluid
Neurogenic shock is caused by:
A radical change in the size of the vascular system
Hypovolemic shock is a result of:
Low volume
An insufficient concentration of ___________ in the blood can produce shock as rapidly as vascular causes.
Oxygen
In anaphylactic shock, the combination of poor oxygenation and poor perfusion is a result of:
Widespread vasodilation
