Which symptom would most likely occur in an organism exposed to tetrodotoxin

The right naswer is D.paralysis due to lack of action potentials to signal muscle tissue.

Tetrodotoxin (TTX) is a toxin (neurotoxic) isolated for the first time in 1909 and present in some species of fish, tetraodons.

It is also called Fugu poison, and tetraodon poison.

Tetrodotoxin is a potent neurotoxin produced by four different strains of bacteria: Aliivibrio fischeri, Pseudomonas sp, Vibrio altermonas and Vibrio alginolyticus.

Tetrodotoxin selectively blocks the pore of voltage-gated sodium channels, thus preventing the passage of nerve impulses. This blockage under a certain level is reversible.

The clinical picture is as follows:

* Impairment of the nervous system with oral and perioral paresthesia, nausea often accompanied by vomiting, sometimes with diarrhea and abdominal pain;

* Dizziness, pallor, feeling unwell, then ataxia and general numbness with the sensation of floating. * Tingling and tingling of the extremities preceding paralysis of the lower limbs and extremities;

* Changes in deep sensitivity, throat and larynx are affected very early causing dysphagia or complete aphagia, and dysphonia;

* Dilation of the pupils (mydriasis);

in the case of acute intoxication, bradycardia and hypotension, hypersalivation, hypothermia, hypersudation, asthenia;

* Cyanosis of the extremities and the lips, petechial haemorrhages on the body.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!

the answer is :