Which of the following is a function of the blood?
Which of the following is a function of the blood?
transport of nutrients and wastes
transport of body heat
transport of gases
All of the answers are correct
All of the following are components of the cardiovascular system except
blood.
arteries.
heart.
lymph vessels.
Each of the following is a way that blood transports materials around the body except
nutrients from the digestive tract to the body.
hormones from endocrine glands to target cells.
carbon dioxide from the lungs to the tissues.
wastes from the cells to the kidneys.
The combination of plasma and formed elements is called
serum.
lymph.
whole blood.
extracellular fluid.
The percent fraction of formed elements relative to whole blood is the
hematocrit.
specific gravity.
viscosity.
Platelets are
red cells that lack a nucleus.
blue cells that have a nucleus.
cytoplasmic fragments of large cells.
tiny cells with a polynucleus.
Which of these is not one of the formed elements of blood?
RBCs
platelets
antibodies
lymphocytes
True or False
Pulmonary artery carries blood to the lungs, and pulmonary veins return oxygenated blood to the heart.
The atrioventricular valves permit blood flow
in one direction only.
in both directions.
in many directions.
in opposite directions on the right and left.
The inner most layer of a blood vessel is the
tunica intima.
tunica externa.
tunica media.
tunica interna.
The outer most layer of a blood vessel is the
tunica intima.
tunica externa.
tunica media.
tunica interna.
Which layer of a blood vessel contains concentric sheets of smooth muscle tissue?
tunica intima.
tunica externa.
tunica media.
tunica interna
Arrange the structures in the following list in the order that blood will encounter as it starts flowing from the heart, moving throughout the body, and then back to the heart in the cardiovascular circuit.
venules
arterioles
capillaries
elastic arteries
medium veins
large veins
muscular arteries A) 4, 7, 2, 3, 1, 5, 6
B) 6, 5, 1, 3, 2, 7, 4
C) 5, 6, 1, 3, 2, 7, 4
D) 2, 7, 6, 3, 1, 5, 4
The large vessels that return blood to the heart are called
arteries.
arterioles.
capillaries.
venules.
veins.
B cells are part of ———
Antibody-mediated immunity
Cell-mediated immunity
Which of the following are the smallest venous vessels?
large veins
venules
medium veins
capillaries
True or False
Erythropoietin is a hormone produced by kidney and released into plasma in response to hypoxia.
Exchange substances between blood and tissues happens in
Arteries
Veins
Capillaries
True or False
Tunica media in veins, generally thinner than the tunica media in arteries.
The ———- has a greater workload than the———- –.
left ventricle; right ventricle
right ventricle; left ventricle
Elastic fibers in the walls of which vessels are stretched as the heart beats?
arteries
veins
capillaries
venules
RBCs (Red Blood Cells) move single file through this structure.
artery
arteriole
capillary
venule
Capillaries that have a complete lining are called
continuous capillaries.
fenestrated capillaries.
sinusoidal capillaries.
Capillaries with a perforated lining (pores) are called
continuous capillaries.
fenestrated capillaries.
sinusoidal capillaries.
sinusoids.
After blood leaves the capillaries, it enters the
arteries.
arterioles.
capillaries.
venules.
veins.
The type of capillary that permit the free exchange of water and solutes as large as plasma proteins are the
perforated capillaries.
discontinuous capillaries.
fenestrated capillaries.
sinusoids.
The superior portion of the heart where major blood vessels enter and exit is the
base.
apex.
right border.
left border.
The inferior point of the heart is called the
base.
apex.
right border.
left border.
Intercalated discs between cardiac muscle cells serve to transfer from cell to cell.
ionic currents
action potentials
the force of contraction
All of the answers are correct
Blood is supplied to the myocardium by
the coronary arteries
contact with blood in the pumping chambers.
arteries that branch from the pulmonary arteries.
None of the answers is correct.
Blood returning to the heart from the systemic circuit first enters the
right atrium.
right ventricle.
left atrium.
left ventricle.
Blood returning to the heart from the pulmonary circuit first enters the
right atrium.
right ventricle.
left atrium.
left ventricle.
The right ventricle pumps blood to the
right and left lungs.
left ventricle.
left atrium.
aorta.
The left ventricle pumps blood to the
lungs.
right ventricle.
right atrium.
aorta.
Lymphocytes function in:
Production of hormones
Transmission of nerve signals
Digestion of fats
Combatting infection
The following are structural components of the conducting system of the heart.
Purkinje fibers
AV node
SA node
bundle branches
The sequence in which excitation would move through this system is which of the following? A) 1, 3, 2, 4
B) 2, 3, 4, 1
C) 2, 4, 3, 1
D) 3, 2, 4, 1
Red Blood Cells are known as
Erythrocytes
Leucocytes
In cardiac muscle, the fast depolarization phase of the action potential is the result of
membrane permeability to ions.
increased; sodium
increased; potassium
decreased; calcium
The long plateau phase of the cardiac muscle action potential is due to
movement of fewer sodium ions across the cell membrane into the cell.
calcium channels remaining open.
decrease in the amount of calcium diffusing across the membrane.
As people age, their blood vessels harden and lose elasticity, a condition called
arteriosclerosis
myocardial infarction
If the arteries that deliver blood to the heart become completely blocked, can occur.
arteriosclerosis
myocardial infarction
True or False
A major role of the lymphatic system is to return tissue fluid to the circulatory system.
Lymph nodes are composed chiefly of:
Blood cells
Platelets
Lymphocytes
Fatty Tissues
If a person had the thymus gland removed, which of the following would NOT occur in his or her body?
production of B cells
production of T cells
maturation of B cells
maturation of T cells
Questions 45-48, match the components of the lymphatic System to their corresponding functions.
Spleen B) Thymus C) Lymph D) Lymph nodes
Fluid that travels in the lymphatic.
Lymphoid organs which house many Lymphocytes and monitor the composition of
lymph.
A primary lymphoid organ, the site of T cell development and maturation.
A secondary lymphoid organ, important for the phagocytosis of OLD Red Blood Cells.
Skin is part of ———
Innate immunity
adaptive immunity
T cells are part of ———
Antibody-mediated immunity
Cell-mediated immunity
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