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Which muscle can become enlarged with the parafunctional habit of bruxism (grinding)?

Which of these muscles is used in frowning?

Which muscle is involved in rotating the head?

The following are major cause(s) of temporomandibular joint disorder, except one. Which one is the exception?

Which of the following muscles raises each labial commissure of the lips to contribute to a smile

  Embryonic stem cells growing in a lab dish are bathed in a “cocktail” of chemicals that cause them to specialize into branching networks of single-nucleated cells that pulsate in unison. This tissue is most likely  

  A warm surface loses heat to the air molecules continuously circulating over it by  

The palatopharyngeal muscle originates from the anterolateral part of the soft palate. It narrows the fauces and elevates the pharynx.

  There are __ types of muscle cells.  

  Functions of neuroglia include which of the following?