Flashcards in Physiology 1 Deck (94)
What are the three components of the cardiovascular system?
The heart, blood, blood vessels
What serves as the transport medium within which materials being transported are dissolved or suspended?
What are the five main functions of the cardiovascular system?
1. Distribute O2 and nutrients throughout body
2. Transport CO2 and metabolic waste products
3. Distribute water, electrolytes, and hormones throughout body
4. Contribute to infrastructure of immune system
What is the pump for the body?
Atrial natriuretic peptide (ANP) does what?
Lowers blood pressure by increasing urine production, thus reducing blood volume
___________ function as the passageways through which blood is directed and distributed.
Vascular endothelial cells are found where?
Lining the inner surface of blood vessels
________ and ________ are two important endothelial vasodilators.
Nitric oxide and prostacyclin
________ and __________ are two important endothelial vasoconstrictors.
Endothelin and thromboxane A2
The heart's main function is a pump. Its second function is an _________?
When atrial blood pressure is increased, what is released?
Atrial natriuretic peptide (ANP)
The two main circuits of the cardiovascular system are: ________ and ___________.
Systemic circulation and pulmonary circulation
The rate blood is pumped from each ventricle: __________.
The rate blood is returned to the atria from the vein: ______.
What is the definition of stroke volume?
The volume of blood pumped out of each ventricle with each contraction of the heart
The pressure in the artery when no blood is being ejected from the left ventricle: __________.
The lowest arterial pressure measured during a cardiac cycle is ____________.
Pulse pressure is ___________.
The difference between systolic and diastolic pressure
The __________________ reflects the volume of blood pumped from the left ventricle in a single beat.
Magnitude of the pulse pressure
The volume in the ventricle before ejection is called what?
End-diastolic volume or preload
The volume in the ventricle after ejection is called what?
What circuit of the cardiovascular system pumps blood of all organs?
The pulmonary circulation circuit consists of the _________, __________, ___________, and __________.
Right heart, pulmonary arteries, veins, and capillaries
Systemic circulation is what type of circulation?
What circulatory circuit utilizes of the left heart, systemic arteries, capillaries, and veins?
Pulmonary circulation pumps blood to the _________ via __________.
Lungs, low pressure circulation
The period of cardiac contraction and emptying is known as ____________.
Systolic pressure is the ___________ arterial pressure measured during a cardiac cycle.
The pressure in the artery after blood has been ejected from the left ventricle is _____________.