BIOL 235 Final Exam Bank (Athabasca University)
Questions and Correct Detailed Answers (Verified Answers) |
Graded A+ | New 2025-2026 Update
Which of the following blood vessels carries blood away from the heart to other
organs?
a) arteries
b) capillaries
c) venules
d) arterioles
e) veins - ANSWER a) arteries
Which of the following blood vessels carries blood from the tissues back to the
heart?
a) arteries
b) arterioles
c) aorta
d) veins
e) capillaries - ANSWER d) veins
Which layer of the arterial wall is responsible for vasoconstriction?
a) tunica interna
b) tunica media
c) tunica externa
,d) tunica albuginea
e) tunica fascia - ANSWER b) tunica media
Which layer of the arterial wall is primarily composed of elastic and collagen
fibers?
a) tunica interna
b) tunica media
c) tunica externa
d) tunica albuginea
e) tunica fascia - ANSWER c) tunica externa
When an artery or arteriole is damaged, its smooth muscle layer contracts
producing
a) tear in the vessel.
b) new vessel branching off the artery or arteriole. c) a vascular spasm.
d) tetanus.
e) increased blood flow to the damaged vessel - ANSWER c) a vascular spasm.
Elastic arteries function as
a) vasodilators.
b) conduits to the tissues of the trunk only.
c) barriers to microcirculation.
d) pressure reservoirs.
e) vasoconstrictors. - ANSWER d) pressure reservoirs.
,In resting individuals, which vessels serve as a large blood reservoir from which
blood can be quickly diverted to other vessels as needed?
a) Arteries and arterioles
b) Arterioles and capillaries
c) Venules and capillaries
d) Veins and venules
e) Aorta and veins - ANSWER d) Veins and venules
Which type of blood vessel plays a key role in regulating blood flow into
capillaries?
a) arteries
b) arterioles
c) venules
d) veins
e) aorta - ANSWER b) arterioles
Which of the following structures are found in veins but NOT in arteries?
a) tunica externa
b) tunica media
c) tunica interna
d) valve
e) lumen - ANSWER d) valve
Capillaries are also referred to as
a) exchange vessels.
, b) vasoconstrictors.
c) vasodilators.
d) pressure reservoirs.
e) distributing vessels. - ANSWER a) exchange vessels.
Which of the following is the most important method of capillary exchange?
a) diffusion
b) transcytosis
c) bulk flow
d) primary active transport
e) secondary active transport - ANSWER a) diffusion
Which of the following structures is used to control the flow of blood through a
capillary bed?
a) thoroughfare channels
b) precapillary sphincters
c) postcapillary sphincters
d) venules
e) valves in veins - ANSWER b) precapillary sphincters
Which of the following types of tissues contains continuous capillaries?
a) skeletal muscle
b) smooth muscle
c) connective tissue
Questions and Correct Detailed Answers (Verified Answers) |
Graded A+ | New 2025-2026 Update
Which of the following blood vessels carries blood away from the heart to other
organs?
a) arteries
b) capillaries
c) venules
d) arterioles
e) veins - ANSWER a) arteries
Which of the following blood vessels carries blood from the tissues back to the
heart?
a) arteries
b) arterioles
c) aorta
d) veins
e) capillaries - ANSWER d) veins
Which layer of the arterial wall is responsible for vasoconstriction?
a) tunica interna
b) tunica media
c) tunica externa
,d) tunica albuginea
e) tunica fascia - ANSWER b) tunica media
Which layer of the arterial wall is primarily composed of elastic and collagen
fibers?
a) tunica interna
b) tunica media
c) tunica externa
d) tunica albuginea
e) tunica fascia - ANSWER c) tunica externa
When an artery or arteriole is damaged, its smooth muscle layer contracts
producing
a) tear in the vessel.
b) new vessel branching off the artery or arteriole. c) a vascular spasm.
d) tetanus.
e) increased blood flow to the damaged vessel - ANSWER c) a vascular spasm.
Elastic arteries function as
a) vasodilators.
b) conduits to the tissues of the trunk only.
c) barriers to microcirculation.
d) pressure reservoirs.
e) vasoconstrictors. - ANSWER d) pressure reservoirs.
,In resting individuals, which vessels serve as a large blood reservoir from which
blood can be quickly diverted to other vessels as needed?
a) Arteries and arterioles
b) Arterioles and capillaries
c) Venules and capillaries
d) Veins and venules
e) Aorta and veins - ANSWER d) Veins and venules
Which type of blood vessel plays a key role in regulating blood flow into
capillaries?
a) arteries
b) arterioles
c) venules
d) veins
e) aorta - ANSWER b) arterioles
Which of the following structures are found in veins but NOT in arteries?
a) tunica externa
b) tunica media
c) tunica interna
d) valve
e) lumen - ANSWER d) valve
Capillaries are also referred to as
a) exchange vessels.
, b) vasoconstrictors.
c) vasodilators.
d) pressure reservoirs.
e) distributing vessels. - ANSWER a) exchange vessels.
Which of the following is the most important method of capillary exchange?
a) diffusion
b) transcytosis
c) bulk flow
d) primary active transport
e) secondary active transport - ANSWER a) diffusion
Which of the following structures is used to control the flow of blood through a
capillary bed?
a) thoroughfare channels
b) precapillary sphincters
c) postcapillary sphincters
d) venules
e) valves in veins - ANSWER b) precapillary sphincters
Which of the following types of tissues contains continuous capillaries?
a) skeletal muscle
b) smooth muscle
c) connective tissue
