Act myosin is responsible for muscle contraction.

It is important to act upon the feedback received from customers.

He has been working in the acting profession for over 20 years.

The self-acting door closed behind me.

He showed a courageous act by saving the child from the burning building.

As soon as she saw my two toothbrushes, she started acting funny.

My computer always acts up when I'm in the middle of something important.

He decided to clean up his act and start living a healthier lifestyle.

I always keep a flashlight handy to act as a backup in case of power failure.