Question

what is the speed of signals from nerves?

Answer 1

i could find this out if i wanted but i needed the points.... FREE MEDALS

Answer 2

lol why?

Answer 3

Depends on the type of nerve: the speed of signal conductance depends on the diameter of the nerve and whether it is myelinated. For example human nerves have myelin sheaths surrounding them meaning ion transfer only occurs at the nodes of Ranvier making it much faster than nodes without this. n fact some diseases result in the loss of these myelin sheaths and as a resultsignals travelling down the nerve are either lost of do not arrive as expected.
There is also the effect from diameter, the larger the diameter the quicker the conductance. Whilst the giant squid has no schwann cells for the myelin sheath the diameter of their nerves is enough to put a fniger inside one. These shoulfd be slow to conduct but due to their size they have a very rapid rate, around 100meters per second.

In a human speed of nerves can vary depending on the type - reactions in nerves for muscles can top 120m/s while thinking is 20-30m/s due to exchange at synapses.

Answer 4

@rsmith
Buddy, u get medals for answering questions posed by others not for asking questions...☺

Answer 5

it`s 1- 3 m/s in unmyelinated fibres while it`s 3 - 120 m/s in myelinated fibres
got it

Answer 6

so can the speed alter for a person who is sufferin 4rm a disease?