What is acetylcholinesterase? Describe its action.

Put the following events in chronological order. (Some of the steps may be missing.)1) Ca*+ floods into the pre-synaptic neuron.2) ch (Acetylcholine) binds to ACh receptors in the sarcolemma.3) Na+ floods into the post-synaptic muscle cell.4) The A.P arrives at the pre-synaptic terminal causing Ca+ channels to open.5) Ach from the synaptic vesicles spills into the pre-synaptic cleft.6) A post-synaptic action potential results in the muscle fiber (depolarization

What is Myesin?

Define the term alpha–gamma coactivation? What is its role?

Caffeine is known to alter transmembrane movement of calcium. What are two possible sites in the nerve and/or muscle that caffeine can act upon?

are these True or False? Receptors on the post-synaptic cell membrane that bind the acetylcholine are voltage-gated channels (channels that open in response to a change in the electrical charge of the membrane). When a muscle cell is not contracting its cell membrane is negative on the inner surface. The effect of a neurotransmitter on the muscle cell membrane is to modify its ion permeability properties temporarily.

Cardiac and skeletal muscle are both “striated” types of muscle and yet they have very distinct functional characteristics.  a) Skeletal muscle functions as discrete motor units and the cardiac muscle works as a functional syncytium.  Define the italicized terms in the previous sentence, explain their importance, and describe the cellular features that underlie these functional differences. b) Cardiac muscle exhibits automaticity, while excitation of skeletal muscle is neurogenic.  Define the italicized terms and provide a brief explanation of mechanisms underlying each.

Explain in detail Muscarinic receptors in regards to the hisamine agonist.  How do they cause smooth muscle contraction.  Provide mechanism

Is Aval and EcoRV beta actin?

Which of the following is NOT true statement about acetylcholine? *       A) Acetylcholine stimulates a muscle to contract       B) Acetylcholine binds to receptors on the sarcolemma       C)Acetylcholine enters muscle fiber when stimulated       D)Acetylcholine is released into a synaptic cleft