A reliable source many have used and says .org
also one that has a short link
Answer:
impulse
Explanation:
Nerve impulse occur when the electrical charges across a nerve cell membrane reverse
2. Releases a substance called pathogen to fight the invader.
Explanation:
The organs of the female reproductive system produce and sustain the female s=x cells (egg cells or ova), transport these cells to a site where they may be fertilized by sperm, provide a favorable environment for the developing fetus, move the fetus to the outside at the end of the development period.
Please be mature w/ sudden words in this!