Use the Following Information to Answer the Question

question 4

Multiple Choice

Use the following information to answer the question.
"Marine cone snails from the genus Conus are estimated to consist of up to 700 species. These predatory molluscs have devised an efficient venom apparatus that allows them to successfully capture polychaete worms, other molluscs, or in some cases fish as their primary food sources.? . . . conotoxins from Australian species of Conus . . . have the capacity to inhibit specifically the nicotinic acetylcholine receptors in higher animals." (B. G. Livett, K. R. Gayler, and Z. Khalil. 2004. Drugs from the sea: Conopeptides as potential therapeutics. Current Medicinal Chemistry 11:1715-23.)
This particular conotoxin inhibits acetylcholine receptors that are located ________.

• A) along the motor neuron axon
• B) on motor neuron dendrites
• C) on the presynaptic membrane of the neuromuscular junction
• D) on the postsynaptic membrane, on the muscle cell

---

Definitions:

Replicable

Describes a study or experiment whose results can be achieved again when the study is repeated under the same conditions.

Replicable

Capable of being repeated or duplicated under similar conditions to achieve a similar result.

Independent Variables

Variables in a scientific experiment that are manipulated or changed by the researcher to determine their effect on the dependent variable.

Clever Hans

Refers to a case study from early 20th century of a horse that was claimed to perform arithmetic and other intellectual tasks, later found to be responding to involuntary cues from humans.