Neurons have long, thin processes called axons, which are structures specialized for conducting signals throughout the organism's nervous system. some axonal processes, such as the axons that originate in the spinal cord and terminate in the muscles of the toes, can be over 1 m in length. small membrane‑enclosed vesicles carrying materials essential to axonal function move along microtubules of the cytoskeleton, from the cell body to the tips of the axons. given an average vesicle velocity of 1 μm/s, how long would it take for a vesicle to move through an axon that started in the spinal cord and ended in the toes (a distance of 1 m)?

1,000,000s

Explanation:

A micrometer (μm) is equal to 1 x 10⁻⁶ m

This means that 1 m = 1 x 10⁶ micrometers or 1,000,000 μm.

You can calculate the time it would take using the formula:

So based on the formula above, you can derive the formula for time which will be:

Distance = 1m or 1,000,000 μmeters

Velocity = 1μm/s

We just plug it into our formula:

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.