Overview Of Circulation Flashcards
(24 cards)
Are these functions of the cardiovascular system: Gas transport Deliver nutrients to cells and storage sites Transport hormones to sites of action Transport waste from the cells Help regulate body temp Stabilize pH Contain cells that fight infection
Yes
Why do we need oxygen
So we can make ATP out of glucose
Why do we need to remove CO2
because too much co2 makes your blood acidic
Which three body systems work together to maintain pH
Cardiovascular
Respiratory
Renal
Is the heart a double pump or a single pump
Double pump
Pulmonary circulation and systemic circulation
When does the heart get most of its blood flow?
Diastole
Which has more smooth muscle and elastic fibers: veins or arteries?
Arteries
Which has more collagen: veins or arteries?
Veins
What is blood pressure
Force of blood exerted against vessel walls
What is blood flow (F)?
Volume of blood flowing through a structure per unit of time (mL/min)
What is resistance (R)?
opposition to blood flow through a vessel
Where does the largest pressure drop happen?
When the blood moves from the arteries to the arterioles….much larger surface area
Which vessel type has the largest surface area
Capillaries
Which vessel type is the major resistance vessel?
Arterioles
Why is the pressure higher in the systemic circulation?
Because the systemic system has MUCH higher resistance than the pulmonary system
Does flow change throughout the circulatory system?
Not really
Blood Flow out from the heart is equal to the blood flow returning to the heart
Velocity of flow is inversely proportional to _____?
Total cross sectional area of the vessel
At any given time, which vessels have the most blood?
Veins and Venules
What are the capacitance vessels?
Veins and venules
Mostly due to their elastic qualities and low amount of smooth muscle
What are the conduit vessels?
Arteries
What are the exchange vessels?
Capillaries
What does parallel arrangement mean regarding blood flow?
It means that the cardiac output is arranged into a separate distribution for each area/organ
What does series blood flow mean/
It means that 100% of the blood is going through the same vessels?
Which vessels decide where the blood goes?
Arterioles
They will constrict/relax to direct blood to organs that need it (ex: skeletal muscle when you’re running)
