Kognity Flashcards
What is the role of the arterial muscle?
The role of the arterial muscle is to keep the arteries narrow enough to maintain the high pressure needed to ensure that the blood has the speed and pressure needed to reach all parts of the body.
What is stroke volume?
The volume of blood pumped but of the left ventricle of the heart each during contraction cor heartbeat
A patient with a pulse rate of 40 beats/minute and a stroke volume of 75 ml/beat will have a cardiac output of:
3,000 ml/minute
The wall of arteries is comprised of various layers. Which of the following layers is usually the thickest layer?
The tunica media
Which layer in the arterial wall includes the endothelium?
Tunica intima
What layer of the arterial wall consists of connective tissue?
Tunica adventitia
Muscle fibers and elastic fibers are essential to the function of arteries. Which of the following layers contains these fibers?
Tunica media
Which of the following is present in all arterioles that is not present in all capillaries?
Circular smooth muscle cells
How does the veins’ positionnext to skeletal muscles ensure unidirectional blood flow?
this function as skeletal muscles squeeze veins, pushing blood along
Which blood vessels generally have thicker walls with narrower lumens?
Arteries
What blood vessels generally have thinner walls with larger lumens?
Veins
Blood returning to the mammalian heart in a pulmonary vein drains first into the:
Left atrium
Which of the following options provide the correct sequence of events for the propagation of the electrical signals initiated in the SA node to the ventricles?
SA node → AV node → Bundle of His → Purkinje fibres → Walls of the ventricles
What structure is used to send messages to the heart to slow down after vigorous exercise?
Vagus nerve
Capillaries are the smallest blood vessels in the body. Which blood vessels do they connect?
Capillaries facilitate the movement of the blood from the arterioles to the venules.
