MCAT Question of the Day
    •

    Q:

    		 A sample of muscle tissue is noted to take significantly longer than regular muscle tissue when it comes to spreading an action potential from muscle cell to muscle cell. After investigation, biologists deduce that the problem with the tissue is structural, rather than chemical, and is likely related to a problem with the cellular membranes. Which of the following is the most likely reason for this problem?
    		 

    A

    		 There is an irregularity with the size or existence of gap junctions.

    B

    		 There is a structural error in the desmosomes of the cell, causing excessive membrane elasticity.

    C

    		 There is an excess of tight junctions, preventing the action potential from propagating.

    D

    		 There is a mutation in the gene for the membrane receptors which assist in propagating action potentials.



    Eukaryotic Cells | Musculoskeletal System |
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