Some hormones enter cells via . Select one: a. primary active transport b. exocytosis c. pinocytosis d. receptor-mediated endocytosis

It’s been a while since I’ve had biology but it could be answer D because endo means in.

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass