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Why do the cardiac muscles cells demonstrate
autorhythmicity?
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- Why, even thoough theyhave an open circulatorysystem, can flying insects likeflies beat their wings withgreat speed?Which of the following is unique to cardiac musclecells?a. Only cardiac muscle contains a sarcoplasmicreticulum.b. Only cardiac muscle has gap junctions.c. Only cardiac muscle is capable ofautorhythmicityd. Only cardiac muscle has a high concentration ofmitochondria.Explain the structure of cardiac muscle and how it helps produce coordinated contraction in each heart chamber.
- Can cardiac muscle exhibit (normally or under experimental conditions) summation or complete tetanus as does skeletal muscle? Why not? (highlight the main answer)The mammalian heart can beat without input from the brain. True Or false?What would be the drawback of cardiac contractions being the same duration as skeletal muscle contractions?