The tissue that is affected during the process in which Platyhelminthes exhibit cephalization is the nervous system. <span>Cephalization is actually a process in which the nervous tissues get clustered towards the end of an organism. I hope that this answer has actually come to your help.</span>
Its chloroplast, mitochondria is power cell nucleus houses DNA and cytoplasm is everything inside cell membrane besides nucleus, or others say cytoplasm is the liquid substance in cell
Answer:
the correct sequence of the events happened during nerve impulse is (d): 2,1,4,3
Explanation:
Originally K+ ions remains inward the membranes while Na+ ions remains outward to maintain a resting potential of membrane.
Upon stimuli Sodium channels open on membrane and Na+ diffuses inward leading to the depolarization of membrane that is it becoming more positive due to Na+ and K+ ions.
To regain it polarized state or in repolarization state Potassium channels open and K+ begun to diffuse outward while Sodium channels gets closed and Na+ ions remains inside the membrane.
Potassium channels are not efficient as compared to Sodium Channels, so an excess amount of K+ion move outward so Hyperpolarization state achieved.
As the both ions are on the wrong side and will not be available for the next nerve impulse. Hence in Refractory period by the help of Na+/K+ pum, both ions move back to their original place and membrane achieve its resting membrane potential state.
Termination? it would make sense if
