Cardiovascular System: Anatomy, Function, and
Cardiac Muscle Physiology Complete Exam |
100% Correct Answers | Verified Edition 2026
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Terms in this set (56)
What is the primary function of the To orchestrate the flow of blood, oxygen, and
cardiovascular system? nutrients to sustain life.
What is the role of the heart in the The heart acts as a pump, maintaining rhythm and
cardiovascular system? circulation essential for health.
What type of muscle tissue is found Cardiac muscle tissue, also known as myocardium.
only in the heart?
What is autorhythmicity in cardiac The ability of cardiac muscle to initiate its own
muscle? 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 muscle 99 percent.
cells are myocardial contractile
cells?
What is the function of myocardial To form the conduction system of the heart and
conducting cells? propagate electrical impulses.
, What are Purkinje cells? Specialized myocardial conducting cells that carry
electrical impulses to the ventricles.
What is the primary difference in size Cardiac contractile cells are 10-20 µm x 50-100 µm,
between cardiac contractile cells while skeletal muscle fibers can be up to 100 µm x
and skeletal muscle fibers? 40 cm.
How many nuclei do cardiac Typically 1, but can have 2-5.
contractile cells typically have?
What is the main energy source for Aerobic metabolism, primarily using lipids 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?
What is the function of intercalated To support synchronized contraction and allow ion
discs? passage between cells.
What initiates the contraction of The influx of calcium ions and the release of
cardiac muscle? calcium from the sarcoplasmic reticulum.
What is the role of calcium ions in Calcium ions bind to troponin, facilitating the
cardiac muscle contraction? interaction between actin and myosin.
What is excitation-contraction The process where an action potential triggers
coupling? calcium influx, leading to muscle contraction.
Cardiac Muscle Physiology Complete Exam |
100% Correct Answers | Verified Edition 2026
Save
Terms in this set (56)
What is the primary function of the To orchestrate the flow of blood, oxygen, and
cardiovascular system? nutrients to sustain life.
What is the role of the heart in the The heart acts as a pump, maintaining rhythm and
cardiovascular system? circulation essential for health.
What type of muscle tissue is found Cardiac muscle tissue, also known as myocardium.
only in the heart?
What is autorhythmicity in cardiac The ability of cardiac muscle to initiate its own
muscle? 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 muscle 99 percent.
cells are myocardial contractile
cells?
What is the function of myocardial To form the conduction system of the heart and
conducting cells? propagate electrical impulses.
, What are Purkinje cells? Specialized myocardial conducting cells that carry
electrical impulses to the ventricles.
What is the primary difference in size Cardiac contractile cells are 10-20 µm x 50-100 µm,
between cardiac contractile cells while skeletal muscle fibers can be up to 100 µm x
and skeletal muscle fibers? 40 cm.
How many nuclei do cardiac Typically 1, but can have 2-5.
contractile cells typically have?
What is the main energy source for Aerobic metabolism, primarily using lipids 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?
What is the function of intercalated To support synchronized contraction and allow ion
discs? passage between cells.
What initiates the contraction of The influx of calcium ions and the release of
cardiac muscle? calcium from the sarcoplasmic reticulum.
What is the role of calcium ions in Calcium ions bind to troponin, facilitating the
cardiac muscle contraction? interaction between actin and myosin.
What is excitation-contraction The process where an action potential triggers
coupling? calcium influx, leading to muscle contraction.
