Match the neurotransmitter with its correct definition.

What is the role of tropomyosin in skeletal muscles?        

Which type of ion channel opens in response to a change in membrane potential?        

Hypothetically, if a muscle were stretched to the point where thick and thin filaments no longer overlapped, _____________.        

According to the lectures, the area that is located throughout the large blue enclosed area is a type of animal and plant biome called __________________________________:   

The Balfour Declaration, which cleared the way for Jews to move to Israel, was a __________________________ mandate: 

According to the lectures, Latin American plantations usually produce _________ crop(s):

The __________ division tends to prepare the body for action.          

Which of the following is not one of the ways that the “oxygen debt” is repayed?        

Essay Question Worth 10 points.   Chief Complaint: A 26-year-old woman with muscle weakness in the face. History: Jill Rothman, a 26-year-old gymnastics instructor, presents with complaints of muscle weakness in her face that comes and goes, but has been getting worse over the past two months. Most notably, she complains that her “jaw gets tired” as she chews and that swallowing has become difficult.  At work, it has become increasingly difficult to “spot” her gymnasts during acrobatic moves because of upper arm weakness. On physical examination, she has notable drooping of both eyelids after repeated blinking exercises. When smiling, she appears to be snarling. Electromyographic testing revealed progressive weakness and decreased amplitude of contraction of the distal arm muscles upon repeated mild shocks. Both her symptoms and electromyographic findings were reversed within 40 seconds of intravenous administration of an acetylcholinesterase inhibitor.  Blood testing revealed high levels of acetylcholine receptor antagonists in her plasma. To treat her symptoms, Jill was given a long-acting anticholinesterase drug. Describe in detail the neuromuscular junction, what you would find there and how it would work to release neurotransmitters in a normal, healthy synapse. How are the acetylcholine receptor antagonists interfering with her normal skeletal muscle activity? How do the anticholinesterase drugs act to improve Jill’s skeletal muscle function?