Answer: Water, land formations, minerals, air, and vegetation are examples of natural physical surroundings.
Explanation:
A. It's a sign of a Heart attack
Explain the role of Calcium(Ca+) in askeletal muscle contraction. Role of calcium { Ca++}: By BONDING to the TROPONIN it causes the TROPOMYOSIN to MOVE from its blocking position on the active sites on the actin filaments SO the CROSS BRIDGES CAN ATTACH.
C. Because the abuse will continue. In the other scenarios, the abuse stops.
