Southeastern Louisiana University

ZOO 250

Ch. 11 quizzes

1)Which of the following contains overlapping thick and thin filaments?

2. The absence or inhibition of acetylcholinesterase at a synapse would lead to?
3. The plasma membrane of a muscle fiber is called?
4. During muscle contraction, a single myosin head consumes ATP at a rate of abt                   ATP per second?
5. Acetylcholine begins the process of depolarization across a sarcolemma by?

6. Myokinase and creatine kinase are two enzymes responsible for?
7. An antagonist?
8. Which statement best describes the goal of medications used to treat myasthenia gravis?
9. (NMJ) what is the function of the structure labeled A in the accompanying figure?
10. When acetylcholinesterase outlasts the release of acetylcholine from the synaptic vesicles, the skeletal muscle?
11. (Red ropes) What is the function of the structure indicated by the arrow in the accompanying figure?
12. What happens when acetylcholine stimulates its receptors in the neuromuscular junction?
13. A myofilament that runs thru the core of a thick filament and anchors it to a Z disc is called a?
14. All muscle types will respond to an electrical stimulus bc all muscle cells are?
15. To stimulate muscle contraction, acetylcholine is released from the                  into the synaptic cleft?
16. Movement?
17. Which of the following marks the boundaries of a sarcomere?
18. During excitation phase of muscle contraction/relaxation, which event(s) occur?
19. (sarcomere) In the accompanying figure, D represents the?
20. When a skeletal muscle lengthens, its           helps resist excessive stretching and subsequent injury to the muscle?
21. (different types of muscles) Which of the following is the correct order of decreasing strength?
22. Which muscle type depends solely on the sarcoplasmic reticulum as its calcium source?
23. (sarcomere) In the accompanying figure, A represents the?
24. A muscle twitch produces external tension and moves an object by shortening the muscle during the         phase?
25.  (NMJ) The structure in the following figure denoted by the letter C contains?
26. How do organophosphate pesticides cause paralysis?
27. The transfer of phosphate from CP to ADP is catalyzed by   ?
28. Which of the following best describes the resting membrane potential (RMP)?

29. At the neuromuscular junction, which chemical is released from the synaptic vesicles of an excited motor neuron?
30. A dark band formed by parallel thick filaments that partly overlap the thin filaments is known as an H band?
31. A deficiency of acetylcholine receptors leads to muscle paralysis in myasthenia gravis?
32. Which of the following do not occur during the muscle relaxation phase?
33. What is the voltage of a resting membrane potential in a neuron?
34. The axon terminal releases acetylcholine into the synaptic cleft, which is received by receptors on the motor end plate. Which structure does this describe?
35. (sarcomere) In the accompanying figure, B represents the?
36. Which of the following structures blocks the active site in G-actin, preventing it from binding to myosin?
37. People can be born natural sprinters, or natural endurance runners?
38. The minimum stimulus needed to cause muscle contraction is called the?
39. Which of the following is a property of collagen?
40. The protein that acts a calcium receptor in skeletal muscle is?
41. Skeletal muscle is called   , because it is usually subject to conscious control?
42. The following are types of myofilaments, EXCEPT?
43. Which of the following is predominately made up of myosin?
44. How many muscle fibers stimulate one somatic motor neuron?
45. (red ropes) What is the name of the structure indicated by the arrow in the accompanying figure?