Dr. Reinhardt Lectures

Question 1

What is an important quality of the smooth muscle? What makes it up?

Answer 1

It has the ability to contract!

1) Circular fibres
2) longitudinal fibers
3) connective tissue

Question 2

What are the two occluding junctions?

Answer 2

1. tight junctions (vertebrates only)
2. septate junctions (invertebrates mainly)

Question 3

What are the 2 anchoring junctions that anchor to the actin filament attachment sites?

Answer 3

1. cell-cell junctions (adherens junctions)
2. cell-matrix junctions (focal adhesions)

Question 4

What are the two anchoring junctions that attach to the intermediate filament attachment sites?

Answer 4

1. cell-cell junctions (desmosomes)
2. cell-matrix junctions (hemidesmosomes)

Question 5

What are the 3 kinds of communicating junctions?

Answer 5

1) gap junctions
2) chemical synapses
3) plasmodesmata (plants only)