5 Questions
What is the main component of the thick filaments in a sarcomere?
Myosin II
How much do sarcomeres shorten to during muscle contraction compared to their resting length?
70%
What is the primary characteristic of paracrine signaling?
Messenger molecules act on cells in close proximity to the source
Why are paracrine messenger molecules typically limited in their ability to travel around the body?
They are inherently unstable or get degraded by enzymes
Which of the following is an example of paracrine signaling?
Neurotransmitter release at the neuromuscular junction
Explore the specialized function of muscle cells in contracting quickly and repetitively to move large loads. Learn about the structure of a typical skeletal muscle cell and its unique features.
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