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.

[Q]: 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.
[A]: Science


[Q]: This results from phonon interactions in simple metals. Joule heating is caused by this, while Wheatstone bridges are used to find unknown values for this quantity. The thermal form of this quantity is equal to the length of the material over the conductivity times the cross-sectional area. "Drug" this occurs when pathogens become able to survive exposure to certain drugs, rendering those drugs obsolete. Drag is sometimes called this of air. Name this term, the electrical type of which measures of the degree an object opposes the flow of an electrical current, measured in ohms.
[A]: Science


[Q]: The Kapuas River is the longest river on this island, the site of Gunung Mulu National Park. Its province of East Kalimantan contains the cities of Samarinda and Balikpapan. This island's Crocker Range contains its highest point, Mount(*) Kinabalu. One country owns the provinces of Sabah and Sarawak on this island. This island lies across the Makassar Strait from Sulawesi and is directly north of Java. A small principality on this island has its capital at Bandar Seri Begawan. For 10 points, name this island, split between Brunei, Malaysia, and Indonesia.
[A]:
Social Science