KINESIOL 2Y03 Lecture Notes - Lecture 16: Endoplasmic Reticulum, T-Tubule, Myofibril
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One individual muscle fiber: mitochondria, depending on which muscle fiber type the number of mitochondria will (cid:448)ar(cid:455). So(cid:373)e use (cid:373)ore o(cid:454)(cid:455)ge(cid:374) so (cid:373)ore (cid:373)ito(cid:272)ho(cid:374)dria are (cid:374)eeded. They repeat in a repeating pattern, this organized structure is called the sarcomere muscle contraction. Extensions of the sarcolemma like a subway, invagination of the sarcolemma, so its pushed through the fiber and created some tubing. Which creates a larger surface area for the plasma mb, bc along the plasma mb ap will be happening, need the ap to move really fast throughout the entire fiber. But bc we only have 1 place were the neuron hits the fiber, so these help with moving the ap. So the ap travels through the fiber via the transverse tubule: brown structure sarcoplasmic reticulum (sr), sarco is a muscle term that is similar to smooth endoplasmic reticulum, version of it in muscles.
