The motor neuron carries the nerve impulse.
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The nerve impulse reaches the neuromuscular junction.
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Calcium ions release into the myofibrils.
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Myosin and actin protein filaments attach to each other.
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Myosin filaments pull on the actin filaments.
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The sarcomere shortens.
The neurotransmitter (ACh) from motor neurons signals a muscle fiber to depolarize. The depolarization (Na+) will trigger Ca++ release and will initiate contraction by binding to troponin. Myosin pulls the actin strands. ATP sustains the contraction.
This has the potential to be a very long answer but I will try to be brief :) Structure is intertwined with function. Often, structure is what determines or enables function and this applies to molecules, macromolecules, and all the way up to organisms. If the structure of something is changed, often the function is too. One prime example of this is in proteins. This is why when they are denatured (their shape changes) they no longer function correctly.
Bioaccumulation. I hope this helps you out :D
Hi,
the order in which the houses will be flooded is A C D B, therefore the answer is letter C. You can see it looking at the lines drawn on the map, that show delimitation of areas with the same altitude from water level. The stripe of land closer to the water will be the first to be flooded.
Hope this helps! If my answer was not clear enough or you’d like further explanation please let me know. Also, English is not my first language, so I’m sorry for any mistake.
Sedimentary rock is the most likely. Igneous and metamorphic rocks go through too much pressure and heat for fossils to be preserved. The bones would just melt away.
