BIO 235 CHAPTER 21 CORRECT 100%
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
Which of the following characteristics of blood depends mostly on the ratio of RBCs to
plasma volume?
A) Total blood volume
B) Blood viscosity
C) Venous return
D) Clotting time
E) Immunoglobulin profile - ANSWER B) Blood viscosity
Which of the following is NOT a contribution of the cardiovascular system to other body
systems?
A) Blood delivers clotting factors and WBCs that aid in hemostasis when skin is
damaged
B) Blood delivers calcium and phosphate ions that are needed for building bone
extracellular matrix
C) Blood carries carbon dioxide to body tissues and removes oxygen for use by other
organs
D) Blood carries newly absorbed nutrients and water to the liver
E) Blood circulates cells and chemicals that carry out immune functions - ANSWER E)
Blood circulates cells and chemicals that carry out immune functions
The cardiovascular center is located
A) In the thoracic cavity
B) In the cerebral cortex
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
Which of the following characteristics of blood depends mostly on the ratio of RBCs to
plasma volume?
A) Total blood volume
B) Blood viscosity
C) Venous return
D) Clotting time
E) Immunoglobulin profile - ANSWER B) Blood viscosity
Which of the following is NOT a contribution of the cardiovascular system to other body
systems?
A) Blood delivers clotting factors and WBCs that aid in hemostasis when skin is
damaged
B) Blood delivers calcium and phosphate ions that are needed for building bone
extracellular matrix
C) Blood carries carbon dioxide to body tissues and removes oxygen for use by other
organs
D) Blood carries newly absorbed nutrients and water to the liver
E) Blood circulates cells and chemicals that carry out immune functions - ANSWER E)
Blood circulates cells and chemicals that carry out immune functions
The cardiovascular center is located
A) In the thoracic cavity
B) In the cerebral cortex
