Anatomy and Physiology Exam 3 Cornell
ACTUAL QUESTIONS AND CORRECT
ANSWERS
What is the functional difference between arteries, veins, and capillaries? - CORRECT
ANSWERS Arteries: carry 02 blood away from heart
Veins: carry de-oxygenated blood to heart
Capillaries: connect arteries and veins
What is another name for tunica interna? - CORRECT ANSWERS "Endothelium"
What types of tissues are found in the tunica interna? - CORRECT ANSWERS Simple
squamous with basement membrane and connective tissue
What are the physical characteristics of the tunica interna? - CORRECT ANSWERS -
selectively permeable
-secretes chemicals (histamine & bradykinin)
-does not allow blood to stick
What types of tissues are found in the tunica media? - CORRECT ANSWERS collagen
and elastic tissue
(and smooth muscle)
What is the purpose of the tunica media? - CORRECT ANSWERS Causes
vasoconstriction
, What types of tissues are found in the tunica externa? - CORRECT ANSWERS Mostly
connective tissue- acts as adventicia (blends with other tissues)
What is the purpose of the tunica externa? - CORRECT ANSWERS Anchors the vessel
and provides passages for small nerves
Which tissue layer is the thickest? - CORRECT ANSWERS Usually tunica media... unless
in large vein (Tunica externa)
Explain how the tissues of the blood vessels get their nutrients. - CORRECT
ANSWERS Blood or Vasa Vasorum: blood vessels that supply blood to the outer half of
the larger vessels
Why are arteries called "resistance vessels"? - CORRECT ANSWERS They have strong,
resilient tissue that can resist high blood pressure
Compare and contrast the three classes of arteries. - CORRECT ANSWERS a) Conducting
arteries: largest, very elastic, good for high BP
b) Distributing arteries: medium sized, lead to organs, mostly thick muscle
c) Resistance arteries: smallest, enter specific organs, "arterioles"
What is the purpose of metarterioles? - CORRECT ANSWERS Lead to capillary bed,
contain pre-capillary sphincters
What is an aneurysm? - CORRECT ANSWERS Weak point in an artery or heart wall
What is a carotid sinus?
ACTUAL QUESTIONS AND CORRECT
ANSWERS
What is the functional difference between arteries, veins, and capillaries? - CORRECT
ANSWERS Arteries: carry 02 blood away from heart
Veins: carry de-oxygenated blood to heart
Capillaries: connect arteries and veins
What is another name for tunica interna? - CORRECT ANSWERS "Endothelium"
What types of tissues are found in the tunica interna? - CORRECT ANSWERS Simple
squamous with basement membrane and connective tissue
What are the physical characteristics of the tunica interna? - CORRECT ANSWERS -
selectively permeable
-secretes chemicals (histamine & bradykinin)
-does not allow blood to stick
What types of tissues are found in the tunica media? - CORRECT ANSWERS collagen
and elastic tissue
(and smooth muscle)
What is the purpose of the tunica media? - CORRECT ANSWERS Causes
vasoconstriction
, What types of tissues are found in the tunica externa? - CORRECT ANSWERS Mostly
connective tissue- acts as adventicia (blends with other tissues)
What is the purpose of the tunica externa? - CORRECT ANSWERS Anchors the vessel
and provides passages for small nerves
Which tissue layer is the thickest? - CORRECT ANSWERS Usually tunica media... unless
in large vein (Tunica externa)
Explain how the tissues of the blood vessels get their nutrients. - CORRECT
ANSWERS Blood or Vasa Vasorum: blood vessels that supply blood to the outer half of
the larger vessels
Why are arteries called "resistance vessels"? - CORRECT ANSWERS They have strong,
resilient tissue that can resist high blood pressure
Compare and contrast the three classes of arteries. - CORRECT ANSWERS a) Conducting
arteries: largest, very elastic, good for high BP
b) Distributing arteries: medium sized, lead to organs, mostly thick muscle
c) Resistance arteries: smallest, enter specific organs, "arterioles"
What is the purpose of metarterioles? - CORRECT ANSWERS Lead to capillary bed,
contain pre-capillary sphincters
What is an aneurysm? - CORRECT ANSWERS Weak point in an artery or heart wall
What is a carotid sinus?
