Where are gap junctions commonly found? Where are gap junctions commonly found? single-unit smooth muscle only multi-unit smooth muscle only cardiac muscle only both single-unit smooth muscle and cardiac muscle both single-unit and multi-unit smooth muscle

Gap junctions are commonly found in Single unit smooth muscle only.

Explanation:

Gap junctions are specialized proteins channel in the cell membranes that allow ions and molecules to move through between adjacent cells. They are found in single unit smooth muscle. This type of muscles are found in the uterus, gastrointestinal tracts and bladder. They contain gap junctions to synchronise membrane depolarization and contracts so that the muscles contracts as single unit

the answer is d.) homologous; have mammary glands