There isn’t exactly a name for it other than “folded sarcolemma”, however, the end of the motor neuron does extend some projections into these spaces.
Inheritance Example
With respect to eye color, the allele for brown eyes (B) is dominant, and the allele for blue eyes (b) is recessive. If a person receives dominant alleles from both parents (BB) she will have brown eyes. ... But if she receives recessive alleles from both parents (bb), she will have blue eyes.
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All accept for “in some cultures there’s an increased risk for certain diseases” and “the populations live at extreme altitudes” because both of these statements do not relate to cultural values
