Cardio Part II SUPP Flashcards
The muscular layer in the wall of a blood vessel
Media
Compared to arteries, veins
have thinner walls
Capillaries that have a complete lining are called
continuous capillaries.
The layer between the tunica media and the tunica externa in a large artery is the
External Elastic membrane
Which of the following layers of a vessel contains collagen fibers with scattered bands of
elastic fibers?
Tunica Externa
After blood leaves the capillaries, it enters the
Venules
Which layer of a blood vessel contains concentric sheets of smooth muscle tissue?
Tunica media
In arteries, the thick layer of elastic fibers associated with the tunica intima is called the
Internal Elastic Membrane
Which of the following is the innermost layer of a blood vessel?
tunica intima
Venoconstriction ________ the amount of blood within the venous system, which ________
the volume in the arterial and capillary systems.
Reduces; Increases
Venous valves are responsible for
Channeling blood toward the heart
Which of the following vessels changes diameter most readily to local conditions or SNS stimulation?
Arterioles
You find fenestrated arteries
Pituitary gland
These vessels may be continuous or fenestrated.
Capillaries
The force that moves fluid out of capillaries is ________ pressure whereas the opposing
force that moves fluid into capillaries is ________ pressure.
hydrostatic; colloid osmotic
Which of the following is normally the greatest source acting on blood flow?
vascular resistance
Some of the fluid that is forced out of capillaries is returned to the blood by the
lymphatic system.
Blood colloid osmotic pressure is produced by
large non-diffusible proteins in the blood plasma.
Calculate the net filtration pressure (NFP) with a blood hydrostatic pressure of 40 mm Hg
and a blood colloid osmotic pressure of 25 mm Hg. Then determine if filtration or reabsorption
occurs.
NFP = ________ and results in a fluid ________.
15 mm Hg; filtration
Branches off the aortic arch include the
brachiocephalic trunk
left subclavian artery
left common carotid artery.
Causes of Edema
the plasma concentration of protein is reduced
Capillary hydrostatic pressure is elevated
Capillary endothelium permeability goes up.
Total peripheral resistance is affected primarily by
Blood vessel diameter
Cross-sectional area is highest in
Capillaries
opposes the flow of blood back to the heart?
Vascular resistance
Baroreceptors are located in the
carotid and aortic sinuses and the right atrial wall.
The vein that is formed from the fusion of the subclavian with the internal and external jugulars is the ________ vein.
BRACHIOCEPHALIC
The brachiocephalic trunk delivers blood to
the right arm, head and neck.
The tunica intima consists of
Simple squamous epithelium
Loose connective epithelium
After the precapillary sphincter, blood enters a(n)
ThoroughFare Channel
What is the difference between elastic arteries and muscular arteries?
Elastic arteries have elastic fibers throughout the tunica media whereas muscular arteries have few elastic fibers in the tunica media.
Which of the following factors will increase the net filtration pressure to move fluid out of capillaries?
decreased plasma albumin and
increased blood hydrostatic pressure
