level: Cardiac Muscle
Questions and Answers List
level questions: Cardiac Muscle
| Question | Answer |
|---|---|
| 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 striated | true |
| 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 junction | intercalated 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 cells | Endomysium seperates cells |
| Function of endomysium | binds 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 innervated | No |
| Name this structure | Intercalated disc |
| Name this structure | Cardiac muscle cell |
| Name this structure | Nucleus |
| Name this structure | Sarcolemma |
| Name this structure | T tuble |
| Name this structure | Sarcoplasmic Reticulum |
| Name this structure | Nucleus |
| Name this structure | Intercalated Discs |
| Name this structure | Gap Junctions - intercalated disc for gap junctions |
| Name this structure | Fasciae adherens - intercalated disc for adherens |
| Name this structure | Mitochondria |
| Name this structure | Z disc |
| Name this structure | I band |
| Name this structure | A band |
| Name this structure | I band |