Explain the relationship between the sarcoplasmic reticulum and the transverse tubules

Sarcoplasmic reticulum resembles endoplasmic reticulum found in other cells; they are structures that surround the myofibrils of skeletal muscle fibers. T tubules or transverse tubules run perpendicular to the axis of the fiber and extend across the surface of sarcoplasmic reticulum. It's role is to conduct impulses from sarcolemma to cell and to sarcoplasmic reticulum.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.