7. If radiation collides with molecules in your body, the molecules lose electrons. When this happens, you produce charged particles called ions. If this happens in our body, the cells may die or they may undergo a change called a . a. Isotope
b. Telomere
c. Mutation
d. Synapse

C maybe I think hope Thais helps

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