Topic 7 Muscular System: Cardiac Muscle

Question 1

• Has a striated appearance due to sarcomeres, has one or two central nuclei, has cells separated by intercalated discs that have gap junctions to allow action potentials to chain flow via electrical synapse, contract involuntarily, and have lots of mitochondria. Cardiac muscle is not connected to bone, rather it forms a net that contracts upon itself and grows via hypertrophy. Finally, both smooth and cardiac muscle are myogenic, or capable of contracting without stimuli from nerve cells.

Answer 1

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