A major source of calcium that initiates contraction of smooth muscle is:

Multiple people are now ill, while two people have expired after injesting tainted fish from a new seafood resturant (Not Red Lobster). The suspect is botulism (Clostridium botulinum). Three other individuals begin improving soon after receiving the only treatment available, E antitoxin. The deadly effect of botulinum toxin results from:

Autonomic nervous system regulation of smooth muscle contraction is influenced by receptor types on muscle fibers. Acetylcholine generally causes contraction in smooth muscle by binding to:

A 24-year-old woman is admitted to the emergency department after an automobile accident in which lacerations to the left wrist severed a major tendon. The severed ends of the tendon were overlapped by 6 centimeter to facilitate suturing and reattachment. Which of the following characteristics would be expected after six weeks compared with the preinjured muscle? Assume that series growth of sarcomeres cannot be completed within 6 weeks.

The function of Titin is that of a:

The end plate potential in skeletal muscle, could, theoretically be generated by a decrease in permeability to:

Compared to a muscle containing predominately Type 1 fibers, the relatively high maximum velocity of shortening of a skeletal muscle containing Type 2 fibers can be partially attributed to a relative abundance of what substance? 

The increase in muscle mass that occurs with weight training is MOST likely caused by an increase in the number of:

The correct temporal order of events for the smooth muscle is:

A typical Type I skletal muscle fiber is: