Item 9 Which example is a way that intercellular communication occurs?

A molecule is sent from one part of a cell to another.

A signal is translated into action for a muscle cell to contract.

A signal is sent from a nerve cell to a muscle cell.

A signal is sent down an exon within a nerve cell.

What must be true for natural selection to heppen

Name the glands associated with human digestive system

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen