Muscle types do differ in their anatomies; we’ve learned only about the most common types. Mark...

Muscle types do differ in their anatomies; we’ve learned only about the most common types. Mark each of the following A if they’d always co-occur; Sif they’d sometimes co-occur, or Nif they’d never co-occur in the same muscle type. (Hint: Base your answers on if one of the items is functional in the absence of the other.)

A. t-tubules and sarcoplasmic reticulum

B. motor units and troponin

Expert Solution

A. T- tubules and sarcoplasmic reticulum - A

They both always occur together in cardiac and skeletal muscles. T tubules conduct impulses from the surface of the cells to sarcoplasmic reticulum which stores calcium.

B. Motor units and troponin - S

They occur together in skeletal muscle but not in cardiac muscle of which troponin is a part.

Sydney Mullin answered 2 years ago

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