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Describe the events which normally occur between the arrival of an action potential at the synaptic knob and its transmission across a neuromuscular junction.

Voltage gated calcium channels open in response to the action potential reaching the presynaptic knob. Calcium ions diffuse into the celll down their concentration gradient. This results in synaptic vesicels...
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Answered by Victoria S. • Biology tutor
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If an element has an atomic mass of 19 and a proton number of 9, how many neutrons does it have and how many electrons does it have?

The atomic mass is made up of all the protons and neutrons (which together form the nucleus) which each have a mass of approx. 1g. Therefore if the mass of the element is 19g and it has 9 protons (proton num...
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Answered by Jay T. • Chemistry tutor
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When do you use the subjunctive voice?

The subjunctive is associated with doubt so whenever an element of doubt is implied by the statement you are trying to compose eg I do not think/no pienso que triggers the subjunctive because you are doubtin...
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Answered by Megan P. • Spanish tutor
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Calcium carbonate is burnt substance B is created. What is the formula for substance B and what is the equation when water is added?

Cao Cao + H20 --> Ca(OH)2
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Answered by Thomas N. • Chemistry tutor
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Is the current American president imperial?

Conclusion: The current American President shows signs of both being imperial and imperilled. Different elements of his incumbency indicate his weak nature; the constraints from Congress and from the courts ...
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Answered by Thomas N. • Politics tutor
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