18 Questions
Arteries have ______ walls because they have a thicker layer of smooth muscle cells.
thicker
Arteries serve as a ______ reservoir.
pressure
Arteries are able to store pressure due to their ______ walls.
elastic
The walls of arteries are composed of smooth muscle tissue and the connective tissue ______.
elastin
Arteries are ______ enough to serve as supports but flexible enough to expand and store pressure.
stiff
Arteries have ______ walls to protect the capillaries and to provide enough time for gas exchange to occur.
thicker
Arteries help redirect blood from tissues that do not require much blood to tissues that need a lot of it. At any given time, certain tissues may need more blood flow than others. This mechanism is known as blood flow ____________.
redistribution
If there is a lack of blood flow to the brain, a person may faint due to the lack of a constant supply of ____________.
oxygen
The heart has to pump blood against gravity to get it to the brain when a person is ____________.
standing up
Blood flow through arteries follows the physical laws describing the blood flow of any liquid through any system of ____________.
pipes
The flow rate of blood through arteries is directly proportional to the difference between the pressures of the two ends of the artery and inversely proportional to the ____________ of the artery.
resistance
In simple terms, blood flow through arteries is higher when the pressure difference between the two ends of the artery is higher and when the resistance to blood flow is ____________.
lower
Blood flow increases when ______ pressure increases.
mean arterial
The pressure gradient is much higher in the ______ circuit than in the pulmonary circuit.
systemic
The most significant drop in blood pressure occurs at the level of the ______.
arterioles
The ______ have a lot of smooth muscle and exhibit significant resistance to flow.
arterioles
Blood pressure decreases as blood flows from the ______, to the arterioles, to the capillaries, to the venules, and finally to the veins.
arteries
If the pressure of blood flowing through the capillaries was too high, the ______ walls would burst.
capillary
Test your understanding of how peripheral resistance can affect blood flow and how cardiac output is determined in the cardiovascular system. Explore concepts such as vasoconstriction, pressure gradients, and mean arterial pressure.
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