Answer:
Power stroke (myosin head bends) coupled with the release of ADP and phosphate
Explanation:
Muscle contraction results from myosin heads adhering to actin and attracting it inwards. It uses ATP. Myosin adhers to actin at a binding site of its globular actin protein and adheres at another binding site for ATP (hydrolyzed ATP to ADP, Pi and energy)
ATP binding prompts myosin to detach from actin, ATP is changed to ADP and inorganic phosphate, Pi by ATPase. The energy formed at this process orientates myosin head to a “cocked” direction.
The myosin head goes in the direction of the M line, holding the actin with it in the process causing the filaments to orientate nearly 10 nm in the direction of the M line--- power stroke (force is produced), the sarcomere reduces in length and the muscle contracts.
Note: The power stroke is seen when ADP and phosphate disattaches itself from the myosin head.
At the terminal point of the power stroke, the myosin head as low-energy, followed by ADP release.
The attached image shows the cross-bridge muscle contraction cycle, which is activated by Ca2+ sticking to the actin active site. And how actin moves in relation to myosin.
Answer:
aceptable value is directly accessed where as experimental value is not coinfermed.
The three characteristics of the cellular theory are:
all cells came from other cells
all living things are made of cell
the basic unit of structure and function is a cell
lol, that's what we're learning in science.
The core
Hope this helps it’s been soo long
Explanation:
Renewable and Nonrenewable resources are types of natural resources.
Renewable resources are those resources that can be replaced and renewed naturally such as air, wind whereas nonrenewable resources are those resources that cannot be replaced naturally such as coal, natural gas.
- Human behavior has affected the natural resources and its quality.
- burning of fossil fuels by the human has affected the natural resources by releasing chemicals and toxic substances in the environment.
- Deforestation, land construction and mining activities have disturbed the ecosystem and natural resources.
- A large number of factories and vehicle used by the human has affected the natural resources as it affects the natural quality and increase in the demand for fossil fuels has resulted in depletion of the limited resources.