Which part of the atom has to stay the same for it to be the same element

Four types of motile cells in human body?

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

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.