biology

Week 3 questions

1.- Please name and explain the functions of the Membrane proteins.

2.- Please explain the passive transport. Give an example. What is the difference between passive and active transport.

3.- What are the functions of gap junctions, and the tight junctions?

4.- Cells in multicellular organisms that respond to a chemical signal from other cells in the same organism are called:

a) Transmitter cell.   b) Target cell.   c) Signaling cells.   d) None of the above.