Answer: Option D: Neuromuscular junction
Explanation:
This is the site of transmission of chemical signal also known as a chemical synapse between a neuron and a muscle fibre. Most of the time the chemical released which is a neurotransmitter is acetylcholine. When released, it stimulates the release of calcuim ions present in the sarcoplasm: an endoplasm like structure in the muscle fiber that contains calcium ions.
A dependent variable is a value that depends on another, so what relies on the other! :)
Up to 30,000 kelvins (or 53,540 degrees Fahrenheit)
Active transport and transpiration about 90% sure on this answer
