Cardiovascular System: Anatomy, Function,
and Cardiac Muscle Physiology Complete
Exam Questions and Answers with Verified
Solutions | Latest Updated 2026
What is the primary function of the To orchestrate the flow of blood, oxygen,
cardiovascular system? and
nutrients to sustain life.
What is the role of the heart in the The heart acts as a pump, maintaining
cardiovascular system? rhythm and
circulation essential for health.
What type of muscle tissue is Cardiac muscle tissue, also known as
found myocardium.
only in the heart?
What is autorhythmicity in cardiac The ability of cardiac muscle to initiate its
muscle? own
electrical potential at a fixed rate.
What are the two major types of Myocardial contractile cells and myocardial
cardiac muscle cells? conducting cells.
What percentage of cardiac 99 percent.
muscle
cells are myocardial contractile
cells?
, What is the function of myocardial To form the conduction system of the heart
conducting cells? and
propagate electrical impulses.
What are Purkinje cells? Specialized myocardial conducting cells
that carry
electrical impulses to the ventricles.
What is the primary difference in Cardiac contractile cells are 10-20 µm x
size 50-100 µm,
between cardiac contractile cells while skeletal muscle fibers can be up to
and skeletal muscle fibers? 100 µm x
40 cm.
How many nuclei do cardiac Typically 1, but can have 2-5.
contractile cells typically have?
What is the main energy source Aerobic metabolism, primarily using lipids
for and
cardiac muscle metabolism? carbohydrates.
What is the role of mitochondria in Mitochondria provide energy for ongoing
cardiac muscle cells? contractions and make up about 25% of
cell
volume.
What structure connects adjacent Intercalated discs.
cardiac muscle cells?
and Cardiac Muscle Physiology Complete
Exam Questions and Answers with Verified
Solutions | Latest Updated 2026
What is the primary function of the To orchestrate the flow of blood, oxygen,
cardiovascular system? and
nutrients to sustain life.
What is the role of the heart in the The heart acts as a pump, maintaining
cardiovascular system? rhythm and
circulation essential for health.
What type of muscle tissue is Cardiac muscle tissue, also known as
found myocardium.
only in the heart?
What is autorhythmicity in cardiac The ability of cardiac muscle to initiate its
muscle? own
electrical potential at a fixed rate.
What are the two major types of Myocardial contractile cells and myocardial
cardiac muscle cells? conducting cells.
What percentage of cardiac 99 percent.
muscle
cells are myocardial contractile
cells?
, What is the function of myocardial To form the conduction system of the heart
conducting cells? and
propagate electrical impulses.
What are Purkinje cells? Specialized myocardial conducting cells
that carry
electrical impulses to the ventricles.
What is the primary difference in Cardiac contractile cells are 10-20 µm x
size 50-100 µm,
between cardiac contractile cells while skeletal muscle fibers can be up to
and skeletal muscle fibers? 100 µm x
40 cm.
How many nuclei do cardiac Typically 1, but can have 2-5.
contractile cells typically have?
What is the main energy source Aerobic metabolism, primarily using lipids
for and
cardiac muscle metabolism? carbohydrates.
What is the role of mitochondria in Mitochondria provide energy for ongoing
cardiac muscle cells? contractions and make up about 25% of
cell
volume.
What structure connects adjacent Intercalated discs.
cardiac muscle cells?
