______________ muscle fibers have large myoglobin stores, slow contraction velocity, and the highest resistance to fatigue
Fill in the blank with correct word.
Slow-twitch
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What is the purpose of motor nerve varicosities as they relate to smooth muscle?
A. They link the thin filaments to the inside of the sarcolemma in smooth muscle. B. They reabsorb the decomposition products of acetylcholine after acetylcholinesterase breaks it down. C. They enable each cardiac myocyte to directly stimulate its neighbors. D. They release neurotransmitter onto smooth muscle cells. E. They prevent single-unit smooth muscle cells from pulling apart.
Which of the following is the primary second messenger in G-protein coupled post-synaptic cells?
A) NO B) CO C) cAMP D) GABA E) ATP
Dynamic equilibrium receptors that detect information about angular or rotational movements of the head are housed in the ________
A) cochlea B) vestibule C) semicircular canals D) oval window
Identify the following components:
