Winds in the atmosphere are created as a result of which of the following? Uneven heating of the air in the atmosphere
Collisions of the air particles in the atmosphere
Gravitational attraction from the Moon
Movement of high level clouds made of icy crystals

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these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.  

1) a

2)c

3)a

4)c

5)b

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