Please read the following passage to answer question 30. You are trying to determine how a variety of drugs affects skeletal, cardiac, and smooth muscle contractions. When properly stimulated all 3 muscle preparations contract normally. When chemical Z is placed on each of the muscle preparations, you observe the following: A) the skeletal muscle and cardiac muscle preparations no longer contract in response to the stimuli, while the smooth muscle preparation contracts normally. Based on the information in the passage above, please choose the best answer from the statements below. 1. Poison Z caused the above effects by inhibiting the electrical signal going down the T-tubules
2. Poison Z prevented calcium from binding to myosin light chain kinase
3. Poison Z prevented myosin from binding to actin.
4. Poison Z prevented the movement of tropomyosin off the myosin binding sites
5. Poison Z prevented the binding of calcium to troponin 6. Poison Z destroyed the dense bodies.
A) Statements 1,4 and 5 are TRUE
B) Statements 3, 4 and 5 are TRUE
C) Statements 2 and 6 are TRUE
D) Statements 4.5. and 6 are TRUE
E) Statements 2 and 5 are TRUE