The two sides of a nerve cell membrane have unequally distributed ions ( Na+ and K+). Sodium is inside, while potassium is outside. Carriers actively transport them. This active transport mechanism is called Sodium-Potassium Pump. Without stimulus, sodium channels are closed while some of the potassium channels are open.
Stimulus (depolarization) will cause the sodium channels to briefly open and the positively-charged ion diffuses into the nerve cell. The membrane potential becomes positive. The potassium channels open and positively-charged potassium diffuse out. With respect to the outside, the inside will become less positive again.
An organism that can be seen only through a microscope. Microorganisms include bacteria, protozoa, algae, and fungi. Although viruses are not considered living organisms, they are sometimes classified as microorganisms.
We define chemical reaction is a process in which old bonds break and new bonds are formed . So from the definition you can get the result easily
Answer:
No porque technicamente no podria ser testificado el ser viviente de los extraterrestes
A <span>lymphocyte is known as a white blood cell that fight germs in the immune system. The answer would be choice B. =)
-UnicornFudge aka Nadia</span>
