In this episode, Mike and Molly turn one of the most complex MCAT topics, muscle contraction, into a story you’ll actually remember. You’ll follow a single movement from brain to bicep: motor neuron → neuromuscular junction → calcium surge → actin–myosin “love story” → sarcomere changes.
We break down skeletal vs cardiac vs smooth muscle, why calcium is the real puppet master, and how ATP can both start and end contraction (and what that has to do with rigor mortis 👀). If sliding filaments, troponin, tropomyosin and band changes all blur together for you right now, this episode will finally make it click.
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