After Reading the Paragraphs Below, Answer the Questions That Follow

question 36

Multiple Choice

After reading the paragraphs below, answer the questions that follow.
Curare is a potent neurotoxin extracted from the Strychnos toxifera plant in Central and South America. Indigenous peoples of South America applied curare to arrows, which they used to hunt and kill animals. Curare acts at synapses between motor neurons and skeletal muscle cells. When a motor neuron synapses with a skeletal muscle cell, the skeletal muscle cell may be stimulated or inhibited just like postsynaptic neurons are. Curare acts by binding temporarily to acetylcholine receptors on the postsynaptic cell and prevents acetylcholine from binding.
-Which could be an effective treatment for curare poisoning?

• A) a drug that promotes acetylcholine reuptake into the presynaptic cells
• B) a drug that removes acetylcholine receptors from the postsynaptic cell
• C) a drug that inhibits acetylcholinesterase (an enzyme that breaks down acetylcholine)

---

Definitions:

Accretionary Prism

A wedge-shaped mass of sediment and rock scraped off the top of a downgoing tectonic plate and accreted onto the overriding plate at a convergent plate boundary.

Fold and Thrust Belt

A region in the earth's crust where the rocks have been deformed by horizontal compression, leading to the formation of folds and thrust faults.

Anticlines

Upwardly convex folds in rock layers, typically formed through compression within the Earth's crust.

Synclines

Downward-curving folds in sedimentary strata, opposite of anticlines, which can also be indicators of oil and gas deposits.