Question

In general size of the cell has no relationship to the size of the organisation how do the nerve cell in a rat and giraffe compare in their length

Answer 1

Thanks for the question!

It is definitely a very interesting question to solve and do some brainstorming.

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Generally size of the cells are not dependent upon the size of the organisms, as, the cells are always generating inside the human body and getting destroyed at a same time.

Giraffe (Scientific Name: Giraffa camelopardalis tippelskirchi) have neurons supported in the spinal cord which is about 2.6 meter long this makes the distance between the brain and the impulses travelling through dendritic branching to project a little slower than expected, making the terms of sending messages a lot more slower, so, the stimulus sensed by the organism will be delayed and the organism will surely get affected due to slower responses given by the body to the stimuli. This was a evolutionary change (through some sorts of Charles Darwin theory can be applied as the cellular conventions could bring about rapid neuronal change) adept by the ancestors to develop a long neck for reaching food resources when in a bad state or condition which permits them to show a bigger body on the Base to evade the predators.

Rat on the other hand (Rattus rattus, Rattus norvegicus, Mus musculus) have quick responses given as a effector as the nerves (in length) are shorter rather than while comparing to Giraffe the show fast actions and the stimuli acted on them makes the to show twitchy movements, as, the are quick respondents they have the ability to react faster than most of the organisms. Mus musculus are used for biological and medicinal purposes and because of the fast responses given by the rat, the chemicals injected and genomic changes give quick results too. They are also found in abundance as of which it makes it a perfect organism for a model in a vast diversification of sciences in genetically engineering or in molecular neuronal neocortical morphology or neuroscience, short nerve lengths have huge advantages.

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Hope it helps and solves your query!!

Answer 2

Your answer
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- Yes, it's true that the size of cell has no relationship to the size of organisation. Many cells are generating continuously and many cells are degenerating also at the same time.
Size of cells varies on a wide range.

- According to Darwin's theory on Evolution, Giraffe also shows evolutionary changes. Giraffe developed their extremely long Neck and massive body to get proper food from big trees. Due to long neck the distance between brain and body also becomes long. Because of this, the nerve cell becomes too long. This made them to respond slow to external environment.

While, in case of rat there body size is much smaller than a Giraffe. So, it's obvious that the impulse projects faster to whole body. Due to which they respond much faster than Giraffe.

So, we can compare in terms of length of nerve cells of both animals. And we find that Giraffe has longer nerve cells so they respond slower and rats have smaller nerve cells that's why they respond faster.
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Thanks !!!