Which statement below is true? * O The atomic mass is equal to the number of protons plus the electrons
O The atomic number is always equal to the number of neutrons.
The atomic number is always equal to the number of protons.
O The atomic number is equal to the number of protons plus neutrons.

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.