Exam Bank BIO 235 - Final Exam-can be used for the Athabasca University bio 235 Final

Exam Bank BIO 235 - Final Exam-can be used for the Athabasca
University bio 235 Final


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 - correct 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 - correct 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 - correct 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 - correct 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 - correct 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. - correct 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 - correct 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 - correct 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 - correct answer d) valve
Capillaries are also referred to as
a) exchange vessels.
b) vasoconstrictors.
c) vasodilators.
d) pressure reservoirs.
e) distributing vessels. - correct 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 - correct 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 - correct answer b) precapillary sphincters
Which of the following types of tissues contains continuous capillaries?
a) skeletal muscle
b) smooth muscle
c) connective tissue
d) lungs
e) all of these choices - correct answer e) all of these choices

, The alternate route of blood flow to a body part through an anastomosis is called
a) a thoroughfare channel.
b) a blood reservoir.
c) a detour route.
d) collateral circulation.
e) microcirculation - correct answer d) collateral circulation.
The largest driving force for pulling fluid from the interstitial spaces back into the capillaries is
a) interstitial fluid hydrostatic pressure.
b) interstitial fluid osmotic pressure.
c) blood colloid osmotic pressure.
d) blood hydrostatic pressure.
e) glomerular hydrostatic pressure. - correct answer c) blood colloid osmotic pressure.
The pressure-driven movement of fluids and solutes from blood into interstitial fluid is called
a) reabsorption.
b) filtration.
c) bulk flow.
d) osmosis.
e) transcytosis. - correct answer b) filtration.
The volume of blood that circulates through the systemic (or pulmonary) blood vessels per
minute is called
a) stroke volume.
b) tidal volume.
c) cardiac output.
d) cardiac reserve.
e) total peripheral resistance - correct answer c) cardiac output.
Cardiac output is dependent on both
a) heart rate and stroke volume.