TASK DEFINITION: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
PROBLEM: When it interacts with ryanodine receptors, this element upregulates its own release, and this compound forms the cell plates of coccolithophores. Stimulation of Gq ("g-sub-q") opens a channel that allows for this ion's movement, and proteins that bind this ion have an EF hand motif. Cellular concentrations of this ion are regulated by IP3. Parafollicular cells of the (*) thyroid produce a compound that reduces the concentration of this ion in blood, and its intestinal absorption requires vitamin D. This ion interacts with Troponin to stimulate muscle contraction, and the lumens of sarcoplasmic reticula have high concentrations of this ion. For 10 points, name this divalent cation that is stored in bones.

SOLUTION: Science

PROBLEM: This novel was published in the U.S. under the title The Labyrinthine Ways. The main character is contrasted with criminals when his picture in the police station is put up next to that of a bank robber. The main character avoids the Red Shirts by traveling by mule into the country's interior, where he takes Marca for his wife, as did his counterpart Father Jos. The main character is then duped by a mestizo and then imprisoned for practicing the rituals of the Church despite being outlawed in Mexico. FTP, identify this novel centering on Father Montez, one of the most famous works of Graham Greene.

SOLUTION: Literature

PROBLEM: One member of this group killed the inhospitable king Amycus with a single blow to the elbow. Euphemus joined this group, which fought the Bebryces and dealt with a pair of rocks which repeatedly pulled apart and clashed together. This group made use of a sacred plank of oak which could talk. Castor and Pollux joined this larger group, which employed the wings of Calais and Zetes to deal with the Harpies. Its leader passed King Aeetes's challenges in Colchis and married the sorceress Medea. For 10 points, name this group of Greek heroes which sailed for the Golden Fleece aboard a similarly-named ship, led by Jason.

SOLUTION:
History