A 15-Year-old boy is brought to your office due to concerning muscles weakness. He Has no prior medical disease and take no medication. He states that he has difficulty climbing stairs. and he cannot left his upper extrimities above his head. On examination, he is unable to lift his arms or legs against resistance when fully outstretched. Muscle biopsy is done and shows sparse transverse tubules in some of the muscle fibers. Which of the following is the most likely consequence of this patient's biopsy findings?

Question

A 15-Year-old boy is brought to your office due to concerning muscles weakness. He Has no prior medical disease and take no medication. He states that he has difficulty climbing stairs. and he cannot left his upper extrimities above his head. On examination, he is unable to lift his arms or legs against resistance when fully outstretched. Muscle biopsy is done and shows sparse transverse tubules in some of the muscle fibers. Which of the following is the most likely consequence of this patient's biopsy findings?

Quizplus · Accepted Answer

Eductional Objective: T-tubules are invaginations of the plasma membrane(sacrolema), which are present exclusively in striated muscle. Their role is to maintain the SR calcium store under the tight control of membrane depolarization and maintain myofibril contraction at tbe same time which is necessary for efficient contraction

A 15-Year-Old Boy Is Brought to Your Office Due to Concerning