The sun does however, revolve about a point in the centre of our galaxy. Taking entire solar system with it at a speed of 220 km/s. This period of orbit takes 225 million years. The sun revolves at about once every 25days at its equator and up to 30 days near its poles.
Answer:
(c) Mechanical gated
Explanation:
Mechanical gated channels are controlled by mechanical forces applied to the channel, this happens when a distortion of the cell membrane causes a deformation on the membrane channels and thus they change their conformation in order to star or stop the exchange of some molecules.
