Ans: Single unit smooth muscle tissue has one neuron that synapses with
several muscle fibers that are connected via gap junctions so they contract
as a unit. In multi unit smooth muscle tissue each fiber has its own neuron.
In the diagram, which parts move to the center of the sarcomere (closer together)
when the fiber contracts?
d) Both a and b
e) None of the above
21. What regulatory proteins can be found on an actin molecule?
a) Troponin and Titin
b) Tropomyosin and Troponin
c) Myosin and Titin
d) Titin and Tropomyosin
e) Titin and Actin
In the diagram, which phase has the formation of the centrosome?
61. Compare and contrast primary and secondary active transport.
Ans: Both are mediated, energy-requiring processes movin