The answer for you question is C
When a muscle cell receives a signal from a motor neuron, every sarcomere within that muscle cell is activated. The signal moves from the motor neuron to the muscle cell by crossing the synapse. When acetylcholine binds the sodium enters the T tubules and this causes calcium to be released from the sarcoplamic reticulum. Calcium binds to tropomyosin, which allows actin to bind to myosin and each sarcomere contracts. There is nothing and no way to separate individual sarcomeres. They are all activated together.
Answer
Practices that can support a circular economy are;
• Ensuring there is high efficiency in use of available resources
• Cutting down the wastes production
• Practicing maximum recycling of wastes
• Using other business models such as focusing on changing consumer behaviors
Explanation
A circular economy is one that focuses more on changing the consumer behavior of using activities that consumes the scarce resourcesto developing a design from waste system which will have positive outcomes to the society. For example , moving towards embracing renewable energy resources through keeping goods and material in use, continuous generation of natural systems and designing out wastes and pollution.
Answer:
A would be the correct answer I'm sure
Explanation:
Have a nice day