Sanshool is a natural compound found in sichuan pepper, which is commonly used in making spicy asian food, and creates a numbing sensation in the mouth. it is known to inhibit a subset of potassium leak channels involved in maintaining the resting membrane potential in sensory neurons. how do you think sanshool affects these sensory neurons?
a. it elevates the resting potential (to less negative values) and makes it easier to excite the neuron.
b. it elevates the resting potential and makes it harder to excite the neuron.
c. it lowers the resting potential and makes it easier to excite the neuron.
d. it lowers the resting potential and makes it harder to excite the neuron.
e. it causes hyperpolarization and decreases the spontaneous firing of the neuron.

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.