Smooth muscles depolarize as a result of a transmembrane current of Calcium ions. When an action potential depolarizes the muscle cell membrane, it also travels into the body of the cell via the t-tubules. Unlike skeletal muscle, smooth muscle is dependent in two sources of calcium in order to intiate contraction. These two sources are calcium sequestered in the S.R. of the smooth muscle cell.
Answer:
1. no because the bacteria will stik on your clothes
2. yeah
Answer:
While looking for food and places to sleep, migrant birds might have more trouble
identifying windows and fly into them more often . However, it could also be that
there are simply more window collisions in the fall because there are more birds in
the area when migrant and resident birds co-occur in urban areas.
