Which of the following statements is true? a. striated muscle cells are long and cylindrical with many nuclei. b. cardiac muscle cells have many nuclei. c. smooth muscle cells have t tubules. d. cardiac muscle cells are found in the heart and large blood vessels.

The statement 'striated muscle cells are long and cylindrical with many nuclei' is TRUE (Option A).

Skeletal muscle cells are multi-nucleated, thereby these cells have more than one nucleus.

Skeletal muscle cells are multinucleated due to the fusion of the myoblasts in order to form each long muscle fiber.

These cells (skeletal muscle cells) are in appearance cilindrical.

Skeletal muscle cells are also striated due to the regular arrangement of actin and myosin contractile proteins.

In conclusion, the statement 'striated muscle cells are long and cylindrical with many nuclei' is TRUE (Option A).

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The correct answer is option A.

Explanation:

Striated muscle tissues are muscle tissue that made up of repeated long functional units known as sarcomeres. The long bands of sarcomeres along with muscle fibers provide it a striated appearance. Striated muscles have more mitochondria in it and also contain cells that are multinucleated, unlike smooth muscles. The major function of these muscles is to generate force and contract. Heart and respiratory organs have such muscle.

Thus, the correct answer is option A.