Put the following events of excitation-contraction coupling in the correct order. a. Calcium ions bind to troponin molecules on the actin myofilaments. open choices for ranking
b. The T tubules carry the action potential to the interior of the muscle fiber. open choices for ranking
c. The troponin-tropomysin complex moves, exposing active sites on the actin myofilaments.
c. Calcium ions are released into the sarcoplasm. open choices for ranking
d. A nerve impulse causes ACh to be released at a neuromuscular junction.
e. The heads of myosin myofilaments bind to sites on the actin myofilaments, forming cross-bridges.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation: