During contraction, the filaments slide past he thick filaments, shortening the sarcomere. The thick and thin filaments do the actual work of a muscle, and the way they do this is pretty cool. Thick filaments are made of a protein called myosin. At the molecular level, a thick filament is a shaft of myosin molecules arranged in a cylinder. Thin filaments are made of another protein called actin. The thin filaments look like two strands of pearls twisted around each other.
False there is no window period if you get HIV it will be in your blood when they test it
Hope this helps
The answer to your question is:
Specific immunity
Answer:
False. Field goal is in football and worth 3 points. Free throw is the only choice in basketball.
Explanation: