co-ordination

Question 1

how do multicellular organisms signal between cells (achieve coordination)?

Answer 1

Multicellular organisms signal between cells using extracellular signalling molecules (and complementary receptor molecules)

Question 1

receptor molecules of target cells are _______ with a ________ ______ for ________ _______ _________.

Answer 1

Receptor molecules of target cells are
proteins with a
- binding site for a specific
signal molecule

Question 2

Binding changes what on the receptor and this leads to?

Answer 2

Binding changes the conformation of the
receptor, which initiates a response within the cell.