Prokaryotic cell don't undergo mitosis. If you observe a cell undergoing mitosis, then it is eukaryotic. In order for mitosis to occur, a nucleus must be present.
Moreover, Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus, meaning its DNA is surrounded by a membrane, and has other membrane-bound organelles. which allow the division of functions. The primary difference between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. The nucleus is where eukaryotes store their genetic information.
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I’d say it’s alveoli because across which diffusion occurs and they’re elastic so they can adjust to different pressures of gases within the lungs...
We have two surfaces of nerve cell the outer and inner surface
- resting : when the outer layer ion charges more positively than the inner layer - depolarization : we have the counter part of this state
- repolarization : return to the polarization
- hyperpolarization : the inner negative ion charges will be more negative even more than the resting potential
Resting potential: the inside of the neuron's axon is -70mV versus the outside of the membrane
Threshold potential: If the impulse that is received by this neuron's dendrtes meets or exceeds its threshold level enough Na+ activation gates (which are protein ion channels in the axon membrane) will open and Na+ will start to flow into the axon following a charge and concentration gradient.
Depolarization: If the action potential has been initiated (and Na+ has started to move into the axon) then the internal negative charged areas of the membrane will open their Na+ gates as well.
Repolarization: Once K+ have started to move outside of the axon, the original charges along the axon membrane start to become reestablished
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