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Questions and Answers
What is the main component of the thick filaments in a sarcomere?
What is the main component of the thick filaments in a sarcomere?
- Myofiber
- Sarcomere
- Myosin II (correct)
- Actin
How much do sarcomeres shorten to during muscle contraction compared to their resting length?
How much do sarcomeres shorten to during muscle contraction compared to their resting length?
- 30%
- 50%
- 70% (correct)
- 80%
What is the primary characteristic of paracrine signaling?
What is the primary characteristic of paracrine signaling?
- Messenger molecules travel long distances through the body
- Messenger molecules are highly stable and do not get degraded
- Paracrine signaling occurs between nerve cells and muscle cells
- Messenger molecules act on cells in close proximity to the source (correct)
Why are paracrine messenger molecules typically limited in their ability to travel around the body?
Why are paracrine messenger molecules typically limited in their ability to travel around the body?
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Which of the following is an example of paracrine signaling?
Which of the following is an example of paracrine signaling?
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