Curare, a poison from a South American shrub, blocks the binding of ACh by muscle cells. What would happen to muscle function if a toxic dose of curare entered the bloodstream?

Paralysis: Action potentials would be impeded at the neuromuscular junction, and the nerve would be unable to trigger the muscle to act
Spasm: The muscle cell will run out of ATP and fluid, becoming hyperexcitable and developing uncontrolled forceful contractions

Seizure: A sudden surge of electrical activity in the brain would cause muscles to stiffen and tremble

No effect: Muscle function is not dependent on the binding of acetylcholine

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.