TopHat Circulation
Sort these vessel types in the order of blood flow, starting with those that first carry blood away from the heart and finishing with those that eventually return blood to the heart.
Arteries Arterioles Capillaries Venules Veins
Decreased HR
Decreased BP due to decreased CO.
Increased blood vessel diameter
Decreased BP due to decreased R.
What is the mean arterial pressure (in mm Hg) in that same person discussed previously? Systolic blood pressure is 180 mm Hg and diastolic blood pressure is 90 mm Hg.
Diastolic + pulse pressure/3 = 120
Peripheral resistance is:
Directly proportional to blood vessel length.
Increased SV
Increased BP due to increased CO.
Assume that the following are the hydrostatic and osmotic conditions at the venous end of a capillary bed: CHP = 17 mm Hg, IFHP = 0 mm Hg, BCOP = 26 mm Hg, IFCOP = 12 mm Hg. Based on these conditions, which statement below correctly describes NFP and the direction of fluid movement?
NFP is 3 mm Hg, filtration is occurring.
You are measuring a person's blood pressure following a brief bout of exercise. Their systolic blood pressure is 180 mm Hg and the diastolic blood pressure is 90 mm Hg. What is their pulse pressure in mm Hg?
Systolic - Diastolic = 90 mm Hg
Elastic arteries description
These arteries are closest to the heart and have relatively larger lumens than other arteries.
Arterioles description
These arteries can be so small that their wall is only an endothelium and a thin layer of smooth muscle fibers.
Muscular arteries description
These arteries have the thickest tunica media of any vessel type.
Which arteries are most directly responsible for controlling the amount of blood entering individual capillary beds?
arterioles
Sinusoid location
bone marrow
Tunica externa tissue content
collagen connective tissue
Which of the following effects would cause decreased venous return?
decreased breathing rate
Suppose that production of blood plasma proteins by the liver is significantly decreased. Will this directly cause an increase or a decrease in the net filtration pressure (NFP) in capillaries?
increase
Will the release of nitric oxide from the endothelial cells of an arteriole increase or decrease in response to a decreased pH of the tissue it serves?
increase
Which feature of the capillary wall results from incomplete tight junctions?
intercellular clefts
An artery with a relatively thick tunica media and a total diameter between 0.1 cm and 1 cm is most likely to be which type?
muscular artery
Name the vessel that drains blood from a capillary bed.
post capillary venule
Which blood vessels carry oxygenated blood?
pulmonary veins systemic/femoral arteries
Tunica intima tissue content
simple squamous epithelium
Arrange the capillary types in order of most to least permeable.
sinusoids fenestrated continuous
continuous location
skin
fenestrated location
small intenstine
Tunica media tissue content
smooth muscle and elastic connective tissue
Arrange the layers of a blood vessel wall, from superficial to deep.
tunica externa tunica media tunica intima
Which layer of the blood vessel wall is responsible for changing lumen diameter?
tunica media
Which component of the cardiovascular center can influence blood pressure by varying the total peripheral resistance?
vasomotor center
Which vessel types may be porous enough to allow diapedesis?
venules
Look closely at Poiseuille's equation. If the viscosity (thickness) of a fluid moving through a tube were to decrease, what would happen to the value of ΔP?
ΔP would decrease.
