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How are signals transmitted across a neuromuscular junction?

Calcium ions enter the presynaptic terminal via voltage gated calcium channels, once the presynaptic terminal is depolarised by an action potential.Calcium ions stimulate vesicles to fuse with the presynapti...
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Answered by Ishan J. • Biology tutor
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Briefly describe the stages of mitosis

Interphase: DNA in chromosomes replicates to have double copies of itself for mitosis. 1 . Prophase: DNA in chromosomes condenses therefore becomes more visible and the nucleus membrane disappears. 2. Metaph...
OA
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Explain the process of synaptic transmission

An action potential reaches the presynaptic neurone. This causes calcium channels to open, leading to calcium ions entering the synaptic knob via facilitated diffusion. This causes synaptic vesicles containi...
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Answered by Thomas K. • Biology tutor
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What is the difference between transcription and translation?

(Insert diagram of the central dogma DNA -> RNA -> Protein)Transcription is the process of converting DNA to RNA . First, within the nucleus , DNA helicase breaks hydrogen bonds between base pairs to u...
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Answered by Sabahat S. • Biology tutor
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What is mRNA splicing and why is it important?

mRNA splicing is a form of post-transcriptional modification of the mRNA transcript. DNA is made up of coding regions called Exons. These determine the amino acid sequence of a polypeptide chain during prote...
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Answered by Katherine P. • Biology tutor
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