Which is true of drugs that decrease membrane permeability to sodium ions? some are used as local. they may block nerve impulses from moving along the axon. they may prevent the perception of pain. they work by blocking sodium channels in the cell membrane. all of these are true?

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave