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What happens at neuromuscular junctions?

A wave of depolarisation is sent toward the neuromuscular junction, this causes voltage gates Ca2+ channels in the presynaptic membrane to open allowing the Ca2+ ions to enter following their concentration g...
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Answered by Max W. • Biology tutor
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What are the differences between the different sturctures of proteins?

There are 4 different structural forms of proteins; Primary, Secondary, Tertiary and Quaternary. The primary structure is a chain of amino acids joined by peptide bonds. The secondary structure is a chain of...
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Answered by Max W. • Biology tutor
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Describe and explain two features of starch that make it a good storage molecule.

One feature is its compact shape. Starch molecules consists of two components: Amylose and Amylopectin. Amylose is the straight chained part and amylopectin is the branch chained part. Both these structures ...
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Answered by Iulia B. • Biology tutor
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Name the respiration surface in humans, and describe how it is adapted to its function

The respiration surface in humans is the alveoli. It is adapted to its function as a gas exchange surface because it has a high surface area to volume ratio, this allows maximum surface area for gas exchange...
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Answered by Olivia G. • Biology tutor
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State one difference between an animal cell and plant cell

Animal cell doesn’t have a cell wall but a plant cell does
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Answered by Morgan C. • Biology tutor
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