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level: Cardiac Muscle

Questions and Answers List

level questions: Cardiac Muscle

QuestionAnswer
What forms the myocardium?cardiac muscle tissue forms the myocardium
What pumps the blood through the heart and blood vessels?Contractions resulting from sliding filament mechanisms pump the blood
True of False: Cardiac muscle tissue is striatedtrue
Mature cardiac muscle cells exhibit a _____.a cross striation pattern one or 2 centrally located nuclei numerous mitochondria
What surrounds the muscle cells?surrounding the muscle cells is a delicate sheath of endomysial connective tissue with a rich capillary network
What is the site of adhesion?intercalated disc
What is the site of gap junctionintercalated disc
what do intercalated disc provide the cell?structural integrity, allow cells to pull against something
Where do muscle cells join?at intercalated discs
What separates cellsEndomysium seperates cells
Function of endomysiumbinds adjacent cardiac fibers
What are the three types of cell junctions?- Desmosomes - Fasciae adherens - Gap junctions
What causes the sliding filament mechanism?contraction is triggered by Calcium entering the sarcoplasm and which they diffuse to the sarcomeres
What is the basis for the rhythmic heartbeat?inherent rhythmicity
Are all cardiac cells innervatedNo
Name this structureIntercalated disc
Name this structureCardiac muscle cell
Name this structureNucleus
Name this structureSarcolemma
Name this structureT tuble
Name this structureSarcoplasmic Reticulum
Name this structureNucleus
Name this structureIntercalated Discs
Name this structureGap Junctions - intercalated disc for gap junctions
Name this structureFasciae adherens - intercalated disc for adherens
Name this structureMitochondria
Name this structureZ disc
Name this structureI band
Name this structureA band
Name this structureI band