Why are strong forces able to hold atomic nuclei together? a. strong forces increase the mass of neutrons. b. strong forces act only between protons at long distances. c. strong forces overcome electrostatic repulsion among protons. d. strong forces act at short distances between electrons and protons.

The strong force is responsible for binding the quarks and gluons into protons and neutrons. so the nucleus of an atom is held together by the strong force, while electrons are held in the atom by the electric force.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later