Cardiovascular System (Blood Vessels)
Exam Questions And Answers
What are arteries? -
correct answer -Blood vessels that carry blood away from the
heart
-Except for pulmonary circulation
What are capillaries? -
correct answer -Capillaries are the exchange vessels. They are
microscopic and have only one wall—tunica intima—allowing
substances to pass through quickly.
-Contact tissue cells; directly serve cellular needs
-Found where gas exchange occurred
What are veins? -
correct answer Blood vessels that carry blood back to the heart
What is a lumen? -
correct answer central blood-filled space of a vessel
What are the three layers in the arteries and veins? -
correct answer Tunica intima, tunica media, and tunica externa
,Cardiovascular System (Blood Vessels)
Exam Questions And Answers
What lining do the capillaries have? -
correct answer -one single layer of endothelium (thin layer)
-allow for diffusion
What is a capillary bed? -
correct answer network of interconnected capillary vessels that
lies between an arteriole and a venule
What happens to the capillaries when you need a lot of blood flow
and when you do not need a lot of blood flow? -
correct answer When you are needing more blood flow the
capillary bed are working at full capacity. When you are not needing
a large amount of blood flow then the collateral vessel will be shut
off and only have a little amount of blow flow.
Ex: digesting vs not digesting, exercising vs sitting
Why do veins have valves? -
correct answer prevent back flow of blood
-muscular milking
,Cardiovascular System (Blood Vessels)
Exam Questions And Answers
How does blood flow back to the heart via the veins? -
correct answer The return of blood to the heart is assisted by
the action of the skeletal- muscle pump. As muscles move, they
squeeze the veins running through them. Veins contain a series of
one-way valves, and they are squeezed, blood is pushed through
the valves, which then close to prevent backflow.
What is the tunica intima? -
correct answer Innermost endothelium:
Inner layer of the blood vessels
Lines lumen of all vessels
-Continuous with endocardium
-Slick surface reduces friction
Subendothelial layer in vessels larger than 1 mm; connective tissue
basement membrane
What is the tunica media? -
correct answer -Smooth muscle and elastic fiber layer, regulated
by the sympathetic nervous system.
, Cardiovascular System (Blood Vessels)
Exam Questions And Answers
-Sympathetic vasomotor nerve fibers control (lumen)
vasoconstriction and vasodilation of vessels
-Influence blood flow and blood pressure
What is the tunica externa (tunica adventitia)? -
correct answer -Collagen fibers protect and reinforce; anchor to
surrounding structures.
-Contains nerve fibers, lymphatic vessels
-Vasa Vasorum of larger vessels nourishes external layer
What is the vasa vasorum? -
correct answer Vessels of the vessels - larger vessels contain
this. Nourish the external tissues of the blood vessel wall.
How big are blood vessels? -
correct answer The closer it is to the heart the larger it is and
the farther away the smaller it is.
What is the arteries from large to small (blood flow from the heart
to the largest arteries down to the capillaries)? -
correct answer Elastic Arteries
Exam Questions And Answers
What are arteries? -
correct answer -Blood vessels that carry blood away from the
heart
-Except for pulmonary circulation
What are capillaries? -
correct answer -Capillaries are the exchange vessels. They are
microscopic and have only one wall—tunica intima—allowing
substances to pass through quickly.
-Contact tissue cells; directly serve cellular needs
-Found where gas exchange occurred
What are veins? -
correct answer Blood vessels that carry blood back to the heart
What is a lumen? -
correct answer central blood-filled space of a vessel
What are the three layers in the arteries and veins? -
correct answer Tunica intima, tunica media, and tunica externa
,Cardiovascular System (Blood Vessels)
Exam Questions And Answers
What lining do the capillaries have? -
correct answer -one single layer of endothelium (thin layer)
-allow for diffusion
What is a capillary bed? -
correct answer network of interconnected capillary vessels that
lies between an arteriole and a venule
What happens to the capillaries when you need a lot of blood flow
and when you do not need a lot of blood flow? -
correct answer When you are needing more blood flow the
capillary bed are working at full capacity. When you are not needing
a large amount of blood flow then the collateral vessel will be shut
off and only have a little amount of blow flow.
Ex: digesting vs not digesting, exercising vs sitting
Why do veins have valves? -
correct answer prevent back flow of blood
-muscular milking
,Cardiovascular System (Blood Vessels)
Exam Questions And Answers
How does blood flow back to the heart via the veins? -
correct answer The return of blood to the heart is assisted by
the action of the skeletal- muscle pump. As muscles move, they
squeeze the veins running through them. Veins contain a series of
one-way valves, and they are squeezed, blood is pushed through
the valves, which then close to prevent backflow.
What is the tunica intima? -
correct answer Innermost endothelium:
Inner layer of the blood vessels
Lines lumen of all vessels
-Continuous with endocardium
-Slick surface reduces friction
Subendothelial layer in vessels larger than 1 mm; connective tissue
basement membrane
What is the tunica media? -
correct answer -Smooth muscle and elastic fiber layer, regulated
by the sympathetic nervous system.
, Cardiovascular System (Blood Vessels)
Exam Questions And Answers
-Sympathetic vasomotor nerve fibers control (lumen)
vasoconstriction and vasodilation of vessels
-Influence blood flow and blood pressure
What is the tunica externa (tunica adventitia)? -
correct answer -Collagen fibers protect and reinforce; anchor to
surrounding structures.
-Contains nerve fibers, lymphatic vessels
-Vasa Vasorum of larger vessels nourishes external layer
What is the vasa vasorum? -
correct answer Vessels of the vessels - larger vessels contain
this. Nourish the external tissues of the blood vessel wall.
How big are blood vessels? -
correct answer The closer it is to the heart the larger it is and
the farther away the smaller it is.
What is the arteries from large to small (blood flow from the heart
to the largest arteries down to the capillaries)? -
correct answer Elastic Arteries
